org.apache.tools.ant

## Class Project

- java.lang.Object
- - org.apache.tools.ant.Project

- All Implemented Interfaces:
    ResourceFactory

      public class Project
      extends java.lang.Object
      implements ResourceFactory

  Central representation of an Ant project. This class defines an Ant project with all of its targets, tasks and various other properties. It also provides the mechanism to kick off a build using a particular target name.

  This class also encapsulates methods which allow files to be referred to using abstract path names which are translated to native system file paths at runtime.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static java.lang.String` | `JAVA_1_0` Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_0` instead.
    `static java.lang.String` | `JAVA_1_1` Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_1` instead.
    `static java.lang.String` | `JAVA_1_2` Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_2` instead.
    `static java.lang.String` | `JAVA_1_3` Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_3` instead.
    `static java.lang.String` | `JAVA_1_4` Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_4` instead.
    `static int` | `MSG_DEBUG` Message priority of "debug".
    `static int` | `MSG_ERR` Message priority of "error".
    `static int` | `MSG_INFO` Message priority of "information".
    `static int` | `MSG_VERBOSE` Message priority of "verbose".
    `static int` | `MSG_WARN` Message priority of "warning".
    `static java.lang.String` | `TOKEN_END` Default filter end token.
    `static java.lang.String` | `TOKEN_START` Default filter start token.

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `Project()` Create a new Ant project.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addBuildListener(BuildListener listener)` Add a build listener to the list.
    `void` | `addDataTypeDefinition(java.lang.String typeName, java.lang.Class typeClass)` Add a new datatype definition.
    `void` | `addFilter(java.lang.String token, java.lang.String value)` Deprecated. since 1.4.x. Use getGlobalFilterSet().addFilter(token,value)
    `void` | `addIdReference(java.lang.String id, java.lang.Object value)` Add an id reference.
    `void` | `addOrReplaceTarget(java.lang.String targetName, Target target)` Add a target to the project, or replaces one with the same name.
    `void` | `addOrReplaceTarget(Target target)` Add a target to the project, or replaces one with the same name.
    `void` | `addReference(java.lang.String referenceName, java.lang.Object value)` Add a reference to the project.
    `void` | `addTarget(java.lang.String targetName, Target target)` Add a new target to the project.
    `void` | `addTarget(Target target)` Add a new target to the project.
    `void` | `addTaskDefinition(java.lang.String taskName, java.lang.Class taskClass)` Add a new task definition to the project.
    `void` | `checkTaskClass(java.lang.Class taskClass)` Check whether or not a class is suitable for serving as Ant task.
    `void` | `copyFile(java.io.File sourceFile, java.io.File destFile)` Deprecated. since 1.4.x
    `void` | `copyFile(java.io.File sourceFile, java.io.File destFile, boolean filtering)` Deprecated. since 1.4.x
    `void` | `copyFile(java.io.File sourceFile, java.io.File destFile, boolean filtering, boolean overwrite)` Deprecated. since 1.4.x
    `void` | `copyFile(java.io.File sourceFile, java.io.File destFile, boolean filtering, boolean overwrite, boolean preserveLastModified)` Deprecated. since 1.4.x
    `void` | `copyFile(java.lang.String sourceFile, java.lang.String destFile)` Deprecated. since 1.4.x
    `void` | `copyFile(java.lang.String sourceFile, java.lang.String destFile, boolean filtering)` Deprecated. since 1.4.x
    `void` | `copyFile(java.lang.String sourceFile, java.lang.String destFile, boolean filtering, boolean overwrite)` Deprecated. since 1.4.x
    `void` | `copyFile(java.lang.String sourceFile, java.lang.String destFile, boolean filtering, boolean overwrite, boolean preserveLastModified)` Deprecated. since 1.4.x
    `void` | `copyInheritedProperties(Project other)` Copy all user properties that have not been set on the command line or a GUI tool from this instance to the Project instance given as the argument.
    `void` | `copyUserProperties(Project other)` Copy all user properties that have been set on the command line or a GUI tool from this instance to the Project instance given as the argument.
    `AntClassLoader` | `createClassLoader(java.lang.ClassLoader parent, Path path)` Factory method to create a class loader for loading classes from a given path.
    `AntClassLoader` | `createClassLoader(Path path)` Factory method to create a class loader for loading classes from a given path.
    `java.lang.Object` | `createDataType(java.lang.String typeName)` Create a new instance of a data type.
    `Project` | `createSubProject()` Create and initialize a subproject.
    `Task` | `createTask(java.lang.String taskType)` Create a new instance of a task, adding it to a list of created tasks for later invalidation.
    `int` | `defaultInput(byte[] buffer, int offset, int length)` Read data from the default input stream.
    `void` | `demuxFlush(java.lang.String output, boolean isError)` Demultiplex flush operations so that each task receives the appropriate messages.
    `int` | `demuxInput(byte[] buffer, int offset, int length)` Demux an input request to the correct task.
    `void` | `demuxOutput(java.lang.String output, boolean isWarning)` Demultiplex output so that each task receives the appropriate messages.
    `void` | `executeSortedTargets(java.util.Vector sortedTargets)` Execute a `Vector` of sorted targets.
    `void` | `executeTarget(java.lang.String targetName)` Execute the specified target and any targets it depends on.
    `void` | `executeTargets(java.util.Vector names)` Execute the specified sequence of targets, and the targets they depend on.
    `void` | `fireBuildFinished(java.lang.Throwable exception)` Send a "build finished" event to the build listeners for this project.
    `void` | `fireBuildStarted()` Send a "build started" event to the build listeners for this project.
    `protected void` | `fireMessageLogged(Project project, java.lang.String message, int priority)` Send a "message logged" project level event to the build listeners for this project.
    `protected void` | `fireMessageLogged(Project project, java.lang.String message, java.lang.Throwable throwable, int priority)` Send a "message logged" project level event to the build listeners for this project.
    `protected void` | `fireMessageLogged(Target target, java.lang.String message, int priority)` Send a "message logged" target level event to the build listeners for this project.
    `protected void` | `fireMessageLogged(Target target, java.lang.String message, java.lang.Throwable throwable, int priority)` Send a "message logged" target level event to the build listeners for this project.
    `protected void` | `fireMessageLogged(Task task, java.lang.String message, int priority)` Send a "message logged" task level event to the build listeners for this project.
    `protected void` | `fireMessageLogged(Task task, java.lang.String message, java.lang.Throwable throwable, int priority)` Send a "message logged" task level event to the build listeners for this project.
    `void` | `fireSubBuildFinished(java.lang.Throwable exception)` Send a "subbuild finished" event to the build listeners for this project.
    `void` | `fireSubBuildStarted()` Send a "subbuild started" event to the build listeners for this project.
    `protected void` | `fireTargetFinished(Target target, java.lang.Throwable exception)` Send a "target finished" event to the build listeners for this project.
    `protected void` | `fireTargetStarted(Target target)` Send a "target started" event to the build listeners for this project.
    `protected void` | `fireTaskFinished(Task task, java.lang.Throwable exception)` Send a "task finished" event to the build listeners for this project.
    `protected void` | `fireTaskStarted(Task task)` Send a "task started" event to the build listeners for this project.
    `java.io.File` | `getBaseDir()` Return the base directory of the project as a file object.
    `java.util.Vector` | `getBuildListeners()` Return a copy of the list of build listeners for the project.
    `java.util.Map` | `getCopyOfDataTypeDefinitions()` Return the current datatype definition map.
    `java.util.Map` | `getCopyOfReferences()` Return a map of the references in the project (String to Object).
    `java.util.Map` | `getCopyOfTargets()` Return the map of targets.
    `java.util.Map` | `getCopyOfTaskDefinitions()` Return the current task definition map.
    `java.lang.ClassLoader` | `getCoreLoader()` Return the core classloader to use for this project.
    `java.util.Hashtable` | `getDataTypeDefinitions()` Return the current datatype definition hashtable.
    `java.io.InputStream` | `getDefaultInputStream()` Get this project's input stream.
    `java.lang.String` | `getDefaultTarget()` Return the name of the default target of the project.
    `java.lang.String` | `getDescription()` Return the project description, if one has been set.
    `java.lang.String` | `getElementName(java.lang.Object element)` Return a description of the type of the given element, with special handling for instances of tasks and data types.
    `Executor` | `getExecutor()` Get this Project's Executor (setting it if necessary).
    `java.util.Hashtable` | `getFilters()` Deprecated. since 1.4.x Use getGlobalFilterSet().getFilterHash().
    `FilterSet` | `getGlobalFilterSet()` Return the set of global filters.
    `java.util.Hashtable` | `getInheritedProperties()` Return a copy of the inherited property hashtable.
    `InputHandler` | `getInputHandler()` Retrieve the current input handler.
    `static java.lang.String` | `getJavaVersion()` Deprecated. since 1.5.x. Use org.apache.tools.ant.util.JavaEnvUtils instead.
    `java.lang.String` | `getName()` Return the project name, if one has been set.
    `static Project` | `getProject(java.lang.Object o)` Get the Project instance associated with the specified object.
    `java.util.Hashtable` | `getProperties()` Return a copy of the properties table.
    `java.lang.String` | `getProperty(java.lang.String propertyName)` Return the value of a property, if it is set.
    `java.lang.Object` | `getReference(java.lang.String key)` Look up a reference by its key (ID).
    `java.util.Hashtable` | `getReferences()` Return a map of the references in the project (String to Object).
    `Resource` | `getResource(java.lang.String name)` Resolve the file relative to the project's basedir and return it as a FileResource.
    `java.util.Hashtable` | `getTargets()` Return the hashtable of targets.
    `java.util.Hashtable` | `getTaskDefinitions()` Return the current task definition hashtable.
    `Task` | `getThreadTask(java.lang.Thread thread)` Get the current task associated with a thread, if any.
    `java.util.Hashtable` | `getUserProperties()` Return a copy of the user property hashtable.
    `java.lang.String` | `getUserProperty(java.lang.String propertyName)` Return the value of a user property, if it is set.
    `boolean` | `hasReference(java.lang.String key)` Does the project know this reference?
    `void` | `inheritIDReferences(Project parent)` Inherit the id references.
    `void` | `init()` Initialise the project.
    `void` | `initProperties()` Initializes the properties.
    `void` | `initSubProject(Project subProject)` Initialize a subproject.
    `boolean` | `isKeepGoingMode()` Return the keep-going mode.
    `void` | `log(java.lang.String message)` Write a message to the log with the default log level of MSG_INFO .
    `void` | `log(java.lang.String message, int msgLevel)` Write a project level message to the log with the given log level.
    `void` | `log(java.lang.String message, java.lang.Throwable throwable, int msgLevel)` Write a project level message to the log with the given log level.
    `void` | `log(Target target, java.lang.String message, int msgLevel)` Write a target level message to the log with the given log level.
    `void` | `log(Target target, java.lang.String message, java.lang.Throwable throwable, int msgLevel)` Write a target level message to the log with the given log level.
    `void` | `log(Task task, java.lang.String message, int msgLevel)` Write a task level message to the log with the given log level.
    `void` | `log(Task task, java.lang.String message, java.lang.Throwable throwable, int msgLevel)` Write a task level message to the log with the given log level.
    `void` | `registerThreadTask(java.lang.Thread thread, Task task)` Register a task as the current task for a thread.
    `void` | `removeBuildListener(BuildListener listener)` Remove a build listener from the list.
    `java.lang.String` | `replaceProperties(java.lang.String value)` Replace ${} style constructions in the given value with the string value of the corresponding data types.
    `java.io.File` | `resolveFile(java.lang.String fileName)` Return the canonical form of a filename.
    `java.io.File` | `resolveFile(java.lang.String fileName, java.io.File rootDir)` Deprecated. since 1.4.x
    `void` | `setBaseDir(java.io.File baseDir)` Set the base directory for the project, checking that the given file exists and is a directory.
    `void` | `setBasedir(java.lang.String baseD)` Set the base directory for the project, checking that the given filename exists and is a directory.
    `void` | `setCoreLoader(java.lang.ClassLoader coreLoader)` Set the core classloader for the project.
    `void` | `setDefault(java.lang.String defaultTarget)` Set the default target of the project.
    `void` | `setDefaultInputStream(java.io.InputStream defaultInputStream)` Set the default System input stream.
    `void` | `setDefaultTarget(java.lang.String defaultTarget)` Deprecated. since 1.5.x. Use setDefault.
    `void` | `setDescription(java.lang.String description)` Set the project description.
    `void` | `setExecutor(Executor e)` Set the Executor instance for this Project.
    `void` | `setFileLastModified(java.io.File file, long time)` Deprecated. since 1.4.x
    `void` | `setInheritedProperty(java.lang.String name, java.lang.String value)` Set a user property, which cannot be overwritten by set/unset property calls.
    `void` | `setInputHandler(InputHandler handler)` Set the input handler.
    `void` | `setJavaVersionProperty()` Set the `ant.java.version` property and tests for unsupported JVM versions.
    `void` | `setKeepGoingMode(boolean keepGoingMode)` Set "keep-going" mode.
    `void` | `setName(java.lang.String name)` Set the name of the project, also setting the user property `ant.project.name`.
    `void` | `setNewProperty(java.lang.String name, java.lang.String value)` Set a property if no value currently exists.
    `void` | `setProjectReference(java.lang.Object obj)` Set a reference to this Project on the parameterized object.
    `void` | `setProperty(java.lang.String name, java.lang.String value)` Set a property.
    `void` | `setSystemProperties()` Add all system properties which aren't already defined as user properties to the project properties.
    `void` | `setUserProperty(java.lang.String name, java.lang.String value)` Set a user property, which cannot be overwritten by set/unset property calls.
    `static boolean` | `toBoolean(java.lang.String s)` Return the boolean equivalent of a string, which is considered `true` if either `"on"`, `"true"`, or `"yes"` is found, ignoring case.
    `java.util.Vector` | `topoSort(java.lang.String[] root, java.util.Hashtable targetTable, boolean returnAll)` Topologically sort a set of targets.
    `java.util.Vector` | `topoSort(java.lang.String root, java.util.Hashtable targetTable)` Topologically sort a set of targets.
    `java.util.Vector` | `topoSort(java.lang.String root, java.util.Hashtable targetTable, boolean returnAll)` Topologically sort a set of targets.
    `static java.lang.String` | `translatePath(java.lang.String toProcess)` Deprecated. since 1.7 Use FileUtils.translatePath instead.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### MSG_ERR

          public static final int MSG_ERR

      Message priority of "error".
      See Also:
        Constant Field Values

    - #### MSG_WARN

          public static final int MSG_WARN

      Message priority of "warning".
      See Also:
        Constant Field Values

    - #### MSG_INFO

          public static final int MSG_INFO

      Message priority of "information".
      See Also:
        Constant Field Values

    - #### MSG_VERBOSE

          public static final int MSG_VERBOSE

      Message priority of "verbose".
      See Also:
        Constant Field Values

    - #### MSG_DEBUG

          public static final int MSG_DEBUG

      Message priority of "debug".
      See Also:
        Constant Field Values

    - #### JAVA_1_0

          public static final java.lang.String JAVA_1_0

      Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_0` instead.
      Version constant for Java 1.0 .
      See Also:
        Constant Field Values

    - #### JAVA_1_1

          public static final java.lang.String JAVA_1_1

      Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_1` instead.
      Version constant for Java 1.1 .
      See Also:
        Constant Field Values

    - #### JAVA_1_2

          public static final java.lang.String JAVA_1_2

      Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_2` instead.
      Version constant for Java 1.2 .
      See Also:
        Constant Field Values

    - #### JAVA_1_3

          public static final java.lang.String JAVA_1_3

      Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_3` instead.
      Version constant for Java 1.3 .
      See Also:
        Constant Field Values

    - #### JAVA_1_4

          public static final java.lang.String JAVA_1_4

      Deprecated. since 1.5.x. Use `JavaEnvUtils.JAVA_1_4` instead.
      Version constant for Java 1.4 .
      See Also:
        Constant Field Values

    - #### TOKEN_START

          public static final java.lang.String TOKEN_START

      Default filter start token.
      See Also:
        Constant Field Values

    - #### TOKEN_END

          public static final java.lang.String TOKEN_END

      Default filter end token.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### Project

          public Project()

      Create a new Ant project.

  - ### Method Detail

    - #### setInputHandler

          public void setInputHandler(InputHandler handler)

      Set the input handler.
      Parameters:
        `handler` - the InputHandler instance to use for gathering input.

    - #### setDefaultInputStream

          public void setDefaultInputStream(java.io.InputStream defaultInputStream)

      Set the default System input stream. Normally this stream is set to System.in. This inputStream is used when no task input redirection is being performed.
      Parameters:
        `defaultInputStream` - the default input stream to use when input is requested.
      Since:
        Ant 1.6

    - #### getDefaultInputStream

          public java.io.InputStream getDefaultInputStream()

      Get this project's input stream.
      Returns:
        the InputStream instance in use by this Project instance to read input.

    - #### getInputHandler

          public InputHandler getInputHandler()

      Retrieve the current input handler.
      Returns:
        the InputHandler instance currently in place for the project instance.

    - #### createSubProject

          public Project createSubProject()

      Create and initialize a subproject. By default the subproject will be of the same type as its parent. If a no-arg constructor is unavailable, the `Project` class will be used.
      Returns:
        a Project instance configured as a subproject of this Project.
      Since:
        Ant 1.7

    - #### initSubProject

          public void initSubProject(Project subProject)

      Initialize a subproject.
      Parameters:
        `subProject` - the subproject to initialize.

    - #### init

          public void init()
                    throws BuildException

      Initialise the project. This involves setting the default task definitions and loading the system properties.
      Throws:
        `BuildException` - if the default task list cannot be loaded.

    - #### initProperties

          public void initProperties()
                              throws BuildException

      Initializes the properties.
      Throws:
        `BuildException` - if an vital property could not be set.
      Since:
        Ant 1.7

    - #### createClassLoader

          public AntClassLoader createClassLoader(Path path)

      Factory method to create a class loader for loading classes from a given path.
      Parameters:
        `path` - the path from which classes are to be loaded.
      Returns:
        an appropriate classloader.

    - #### createClassLoader

          public AntClassLoader createClassLoader(java.lang.ClassLoader parent,
                                         Path path)

      Factory method to create a class loader for loading classes from a given path.
      Parameters:
        `parent` - the parent classloader for the new loader.
        `path` - the path from which classes are to be loaded.
      Returns:
        an appropriate classloader.

    - #### setCoreLoader

          public void setCoreLoader(java.lang.ClassLoader coreLoader)

      Set the core classloader for the project. If a `null` classloader is specified, the parent classloader should be used.
      Parameters:
        `coreLoader` - The classloader to use for the project. May be `null`.

    - #### getCoreLoader

          public java.lang.ClassLoader getCoreLoader()

      Return the core classloader to use for this project. This may be `null`, indicating that the parent classloader should be used.
      Returns:
        the core classloader to use for this project.

    - #### addBuildListener

          public void addBuildListener(BuildListener listener)

      Add a build listener to the list. This listener will be notified of build events for this project.
      Parameters:
        `listener` - The listener to add to the list. Must not be `null`.

    - #### removeBuildListener

          public void removeBuildListener(BuildListener listener)

      Remove a build listener from the list. This listener will no longer be notified of build events for this project.
      Parameters:
        `listener` - The listener to remove from the list. Should not be `null`.

    - #### getBuildListeners

          public java.util.Vector getBuildListeners()

      Return a copy of the list of build listeners for the project.
      Returns:
        a list of build listeners for the project

    - #### log

          public void log(java.lang.String message)

      Write a message to the log with the default log level of MSG_INFO .
      Parameters:
        `message` - The text to log. Should not be `null`.

    - #### log

          public void log(java.lang.String message,
                 int msgLevel)

      Write a project level message to the log with the given log level.
      Parameters:
        `message` - The text to log. Should not be `null`.
        `msgLevel` - The log priority level to use.

    - #### log

          public void log(java.lang.String message,
                 java.lang.Throwable throwable,
                 int msgLevel)

      Write a project level message to the log with the given log level.
      Parameters:
        `message` - The text to log. Should not be `null`.
        `throwable` - The exception causing this log, may be `null`.
        `msgLevel` - The log priority level to use.
      Since:
        1.7

    - #### log

          public void log(Task task,
                 java.lang.String message,
                 int msgLevel)

      Write a task level message to the log with the given log level.
      Parameters:
        `task` - The task to use in the log. Must not be `null`.
        `message` - The text to log. Should not be `null`.
        `msgLevel` - The log priority level to use.

    - #### log

          public void log(Task task,
                 java.lang.String message,
                 java.lang.Throwable throwable,
                 int msgLevel)

      Write a task level message to the log with the given log level.
      Parameters:
        `task` - The task to use in the log. Must not be `null`.
        `message` - The text to log. Should not be `null`.
        `throwable` - The exception causing this log, may be `null`.
        `msgLevel` - The log priority level to use.
      Since:
        1.7

    - #### log

          public void log(Target target,
                 java.lang.String message,
                 int msgLevel)

      Write a target level message to the log with the given log level.
      Parameters:
        `target` - The target to use in the log. Must not be `null`.
        `message` - The text to log. Should not be `null`.
        `msgLevel` - The log priority level to use.

    - #### log

          public void log(Target target,
                 java.lang.String message,
                 java.lang.Throwable throwable,
                 int msgLevel)

      Write a target level message to the log with the given log level.
      Parameters:
        `target` - The target to use in the log. Must not be `null`.
        `message` - The text to log. Should not be `null`.
        `throwable` - The exception causing this log, may be `null`.
        `msgLevel` - The log priority level to use.
      Since:
        1.7

    - #### getGlobalFilterSet

          public FilterSet getGlobalFilterSet()

      Return the set of global filters.
      Returns:
        the set of global filters.

    - #### setProperty

          public void setProperty(java.lang.String name,
                         java.lang.String value)

      Set a property. Any existing property of the same name is overwritten, unless it is a user property.
      Parameters:
        `name` - The name of property to set. Must not be `null`.
        `value` - The new value of the property. Must not be `null`.

    - #### setNewProperty

          public void setNewProperty(java.lang.String name,
                            java.lang.String value)

      Set a property if no value currently exists. If the property exists already, a message is logged and the method returns with no other effect.
      Parameters:
        `name` - The name of property to set. Must not be `null`.
        `value` - The new value of the property. Must not be `null`.
      Since:
        1.5

    - #### setUserProperty

          public void setUserProperty(java.lang.String name,
                             java.lang.String value)

      Set a user property, which cannot be overwritten by set/unset property calls. Any previous value is overwritten.
      Parameters:
        `name` - The name of property to set. Must not be `null`.
        `value` - The new value of the property. Must not be `null`.
      See Also:
        `setProperty(String,String)`

    - #### setInheritedProperty

          public void setInheritedProperty(java.lang.String name,
                                  java.lang.String value)

      Set a user property, which cannot be overwritten by set/unset property calls. Any previous value is overwritten. Also marks these properties as properties that have not come from the command line.
      Parameters:
        `name` - The name of property to set. Must not be `null`.
        `value` - The new value of the property. Must not be `null`.
      See Also:
        `setProperty(String,String)`

    - #### getProperty

          public java.lang.String getProperty(java.lang.String propertyName)

      Return the value of a property, if it is set.
      Parameters:
        `propertyName` - The name of the property. May be `null`, in which case the return value is also `null`.
      Returns:
        the property value, or `null` for no match or if a `null` name is provided.

    - #### replaceProperties

          public java.lang.String replaceProperties(java.lang.String value)
                                             throws BuildException

      Replace ${} style constructions in the given value with the string value of the corresponding data types.
      Parameters:
        `value` - The string to be scanned for property references. May be `null`.
      Returns:
        the given string with embedded property names replaced by values, or `null` if the given string is `null`.
      Throws:
        `BuildException` - if the given value has an unclosed property name, e.g. `${xxx`.

    - #### getUserProperty

          public java.lang.String getUserProperty(java.lang.String propertyName)

      Return the value of a user property, if it is set.
      Parameters:
        `propertyName` - The name of the property. May be `null`, in which case the return value is also `null`.
      Returns:
        the property value, or `null` for no match or if a `null` name is provided.

    - #### getProperties

          public java.util.Hashtable getProperties()

      Return a copy of the properties table.
      Returns:
        a hashtable containing all properties (including user properties).

    - #### getUserProperties

          public java.util.Hashtable getUserProperties()

      Return a copy of the user property hashtable.
      Returns:
        a hashtable containing just the user properties.

    - #### getInheritedProperties

          public java.util.Hashtable getInheritedProperties()

      Return a copy of the inherited property hashtable.
      Returns:
        a hashtable containing just the inherited properties.
      Since:
        Ant 1.8.0

    - #### copyUserProperties

          public void copyUserProperties(Project other)

      Copy all user properties that have been set on the command line or a GUI tool from this instance to the Project instance given as the argument.

      To copy all "user" properties, you will also have to call `copyInheritedProperties`.

      Parameters:
        `other` - the project to copy the properties to. Must not be null.
      Since:
        Ant 1.5

    - #### copyInheritedProperties

          public void copyInheritedProperties(Project other)

      Copy all user properties that have not been set on the command line or a GUI tool from this instance to the Project instance given as the argument.

      To copy all "user" properties, you will also have to call `copyUserProperties`.

      Parameters:
        `other` - the project to copy the properties to. Must not be null.
      Since:
        Ant 1.5

    - #### setDefaultTarget

          public void setDefaultTarget(java.lang.String defaultTarget)

      Deprecated. since 1.5.x. Use setDefault.
      Set the default target of the project.
      Parameters:
        `defaultTarget` - The name of the default target for this project. May be `null`, indicating that there is no default target.
      See Also:
        `setDefault(String)`

    - #### getDefaultTarget

          public java.lang.String getDefaultTarget()

      Return the name of the default target of the project.
      Returns:
        name of the default target or `null` if no default has been set.

    - #### setDefault

          public void setDefault(java.lang.String defaultTarget)

      Set the default target of the project.
      Parameters:
        `defaultTarget` - The name of the default target for this project. May be `null`, indicating that there is no default target.

    - #### setName

          public void setName(java.lang.String name)

      Set the name of the project, also setting the user property `ant.project.name`.
      Parameters:
        `name` - The name of the project. Must not be `null`.

    - #### getName

          public java.lang.String getName()

      Return the project name, if one has been set.
      Returns:
        the project name, or `null` if it hasn't been set.

    - #### setDescription

          public void setDescription(java.lang.String description)

      Set the project description.
      Parameters:
        `description` - The description of the project. May be `null`.

    - #### getDescription

          public java.lang.String getDescription()

      Return the project description, if one has been set.
      Returns:
        the project description, or `null` if it hasn't been set.

    - #### addFilter

          public void addFilter(java.lang.String token,
                       java.lang.String value)

      Deprecated. since 1.4.x. Use getGlobalFilterSet().addFilter(token,value)
      Add a filter to the set of global filters.
      Parameters:
        `token` - The token to filter. Must not be `null`.
        `value` - The replacement value. Must not be `null`.
      See Also:
        `getGlobalFilterSet()`, `FilterSet.addFilter(String,String)`

    - #### getFilters

          public java.util.Hashtable getFilters()

      Deprecated. since 1.4.x Use getGlobalFilterSet().getFilterHash().
      Return a hashtable of global filters, mapping tokens to values.
      Returns:
        a hashtable of global filters, mapping tokens to values (String to String).
      See Also:
        `getGlobalFilterSet()`, `FilterSet.getFilterHash()`

    - #### setBasedir

          public void setBasedir(java.lang.String baseD)
                          throws BuildException

      Set the base directory for the project, checking that the given filename exists and is a directory.
      Parameters:
        `baseD` - The project base directory. Must not be `null`.
      Throws:
        `BuildException` - if the directory if invalid.

    - #### setBaseDir

          public void setBaseDir(java.io.File baseDir)
                          throws BuildException

      Set the base directory for the project, checking that the given file exists and is a directory.
      Parameters:
        `baseDir` - The project base directory. Must not be `null`.
      Throws:
        `BuildException` - if the specified file doesn't exist or isn't a directory.

    - #### getBaseDir

          public java.io.File getBaseDir()

      Return the base directory of the project as a file object.
      Returns:
        the project base directory, or `null` if the base directory has not been successfully set to a valid value.

    - #### setKeepGoingMode

          public void setKeepGoingMode(boolean keepGoingMode)

      Set "keep-going" mode. In this mode Ant will try to execute as many targets as possible. All targets that do not depend on failed target(s) will be executed. If the keepGoing settor/getter methods are used in conjunction with the `ant.executor.class` property, they will have no effect.
      Parameters:
        `keepGoingMode` - "keep-going" mode
      Since:
        Ant 1.6

    - #### isKeepGoingMode

          public boolean isKeepGoingMode()

      Return the keep-going mode. If the keepGoing settor/getter methods are used in conjunction with the `ant.executor.class` property, they will have no effect.
      Returns:
        "keep-going" mode
      Since:
        Ant 1.6

    - #### getJavaVersion

          public static java.lang.String getJavaVersion()

      Deprecated. since 1.5.x. Use org.apache.tools.ant.util.JavaEnvUtils instead.
      Return the version of Java this class is running under.
      Returns:
        the version of Java as a String, e.g. "1.1" .
      See Also:
        `JavaEnvUtils.getJavaVersion()`

    - #### setJavaVersionProperty

          public void setJavaVersionProperty()
                                      throws BuildException

      Set the `ant.java.version` property and tests for unsupported JVM versions. If the version is supported, verbose log messages are generated to record the Java version and operating system name.
      Throws:
        `BuildException` - if this Java version is not supported.
      See Also:
        `JavaEnvUtils.getJavaVersion()`

    - #### setSystemProperties

          public void setSystemProperties()

      Add all system properties which aren't already defined as user properties to the project properties.

    - #### addTaskDefinition

          public void addTaskDefinition(java.lang.String taskName,
                               java.lang.Class taskClass)
                                 throws BuildException

      Add a new task definition to the project. Attempting to override an existing definition with an equivalent one (i.e. with the same classname) results in a verbose log message. Attempting to override an existing definition with a different one results in a warning log message and invalidates any tasks which have already been created with the old definition.
      Parameters:
        `taskName` - The name of the task to add. Must not be `null`.
        `taskClass` - The full name of the class implementing the task. Must not be `null`.
      Throws:
        `BuildException` - if the class is unsuitable for being an Ant task. An error level message is logged before this exception is thrown.
      See Also:
        `checkTaskClass(Class)`

    - #### checkTaskClass

          public void checkTaskClass(java.lang.Class taskClass)
                              throws BuildException

      Check whether or not a class is suitable for serving as Ant task. Ant task implementation classes must be public, concrete, and have a no-arg constructor.
      Parameters:
        `taskClass` - The class to be checked. Must not be `null`.
      Throws:
        `BuildException` - if the class is unsuitable for being an Ant task. An error level message is logged before this exception is thrown.

    - #### getTaskDefinitions

          public java.util.Hashtable getTaskDefinitions()

      Return the current task definition hashtable. The returned hashtable is "live" and so should not be modified.
      Returns:
        a map of from task name to implementing class (String to Class).

    - #### getCopyOfTaskDefinitions

          public java.util.Map getCopyOfTaskDefinitions()

      Return the current task definition map. The returned map is a copy of the "live" definitions.
      Returns:
        a map of from task name to implementing class (String to Class).
      Since:
        Ant 1.8.1

    - #### addDataTypeDefinition

          public void addDataTypeDefinition(java.lang.String typeName,
                                   java.lang.Class typeClass)

      Add a new datatype definition. Attempting to override an existing definition with an equivalent one (i.e. with the same classname) results in a verbose log message. Attempting to override an existing definition with a different one results in a warning log message, but the definition is changed.
      Parameters:
        `typeName` - The name of the datatype. Must not be `null`.
        `typeClass` - The full name of the class implementing the datatype. Must not be `null`.

    - #### getDataTypeDefinitions

          public java.util.Hashtable getDataTypeDefinitions()

      Return the current datatype definition hashtable. The returned hashtable is "live" and so should not be modified.
      Returns:
        a map of from datatype name to implementing class (String to Class).

    - #### getCopyOfDataTypeDefinitions

          public java.util.Map getCopyOfDataTypeDefinitions()

      Return the current datatype definition map. The returned map is a copy pf the "live" definitions.
      Returns:
        a map of from datatype name to implementing class (String to Class).
      Since:
        Ant 1.8.1

    - #### addTarget

          public void addTarget(Target target)
                         throws BuildException

      Add a new target to the project.
      Parameters:
        `target` - The target to be added to the project. Must not be `null`.
      Throws:
        `BuildException` - if the target already exists in the project
      See Also:
        `addOrReplaceTarget(Target)`

    - #### addTarget

          public void addTarget(java.lang.String targetName,
                       Target target)
                         throws BuildException

      Add a new target to the project.
      Parameters:
        `targetName` - The name to use for the target. Must not be `null`.
        `target` - The target to be added to the project. Must not be `null`.
      Throws:
        `BuildException` - if the target already exists in the project.
      See Also:
        `addOrReplaceTarget(String, Target)`

    - #### addOrReplaceTarget

          public void addOrReplaceTarget(Target target)

      Add a target to the project, or replaces one with the same name.
      Parameters:
        `target` - The target to be added or replaced in the project. Must not be `null`.

    - #### addOrReplaceTarget

          public void addOrReplaceTarget(java.lang.String targetName,
                                Target target)

      Add a target to the project, or replaces one with the same name.
      Parameters:
        `targetName` - The name to use for the target. Must not be `null`.
        `target` - The target to be added or replaced in the project. Must not be `null`.

    - #### getTargets

          public java.util.Hashtable getTargets()

      Return the hashtable of targets. The returned hashtable is "live" and so should not be modified.
      Returns:
        a map from name to target (String to Target).

    - #### getCopyOfTargets

          public java.util.Map getCopyOfTargets()

      Return the map of targets. The returned map is a copy of the "live" targets.
      Returns:
        a map from name to target (String to Target).
      Since:
        Ant 1.8.1

    - #### createTask

          public Task createTask(java.lang.String taskType)
                          throws BuildException

      Create a new instance of a task, adding it to a list of created tasks for later invalidation. This causes all tasks to be remembered until the containing project is removed
      Parameters:
        `taskType` - The name of the task to create an instance of. Must not be `null`.
      Returns:
        an instance of the specified task, or `null` if the task name is not recognised.
      Throws:
        `BuildException` - if the task name is recognised but task creation fails.

    - #### createDataType

          public java.lang.Object createDataType(java.lang.String typeName)
                                          throws BuildException

      Create a new instance of a data type.
      Parameters:
        `typeName` - The name of the data type to create an instance of. Must not be `null`.
      Returns:
        an instance of the specified data type, or `null` if the data type name is not recognised.
      Throws:
        `BuildException` - if the data type name is recognised but instance creation fails.

    - #### setExecutor

          public void setExecutor(Executor e)

      Set the Executor instance for this Project.
      Parameters:
        `e` - the Executor to use.

    - #### getExecutor

          public Executor getExecutor()

      Get this Project's Executor (setting it if necessary).
      Returns:
        an Executor instance.

    - #### executeTargets

          public void executeTargets(java.util.Vector names)
                              throws BuildException

      Execute the specified sequence of targets, and the targets they depend on.
      Parameters:
        `names` - A vector of target name strings to execute. Must not be `null`.
      Throws:
        `BuildException` - if the build failed.

    - #### demuxOutput

          public void demuxOutput(java.lang.String output,
                         boolean isWarning)

      Demultiplex output so that each task receives the appropriate messages. If the current thread is not currently executing a task, the message is logged directly.
      Parameters:
        `output` - Message to handle. Should not be `null`.
        `isWarning` - Whether the text represents an warning (`true`) or information (`false`).

    - #### defaultInput

          public int defaultInput(byte[] buffer,
                         int offset,
                         int length)
                           throws java.io.IOException

      Read data from the default input stream. If no default has been specified, System.in is used.
      Parameters:
        `buffer` - the buffer into which data is to be read.
        `offset` - the offset into the buffer at which data is stored.
        `length` - the amount of data to read.
      Returns:
        the number of bytes read.
      Throws:
        `java.io.IOException` - if the data cannot be read.
      Since:
        Ant 1.6

    - #### demuxInput

          public int demuxInput(byte[] buffer,
                       int offset,
                       int length)
                         throws java.io.IOException

      Demux an input request to the correct task.
      Parameters:
        `buffer` - the buffer into which data is to be read.
        `offset` - the offset into the buffer at which data is stored.
        `length` - the amount of data to read.
      Returns:
        the number of bytes read.
      Throws:
        `java.io.IOException` - if the data cannot be read.
      Since:
        Ant 1.6

    - #### demuxFlush

          public void demuxFlush(java.lang.String output,
                        boolean isError)

      Demultiplex flush operations so that each task receives the appropriate messages. If the current thread is not currently executing a task, the message is logged directly.
      Parameters:
        `output` - Message to handle. Should not be `null`.
        `isError` - Whether the text represents an error (`true`) or information (`false`).
      Since:
        Ant 1.5.2

    - #### executeTarget

          public void executeTarget(java.lang.String targetName)
                             throws BuildException

      Execute the specified target and any targets it depends on.
      Parameters:
        `targetName` - The name of the target to execute. Must not be `null`.
      Throws:
        `BuildException` - if the build failed.

    - #### executeSortedTargets

          public void executeSortedTargets(java.util.Vector sortedTargets)
                                    throws BuildException

      Execute a `Vector` of sorted targets.
      Parameters:
        `sortedTargets` - the aforementioned `Vector`.
      Throws:
        `BuildException` - on error.

    - #### resolveFile

          public java.io.File resolveFile(java.lang.String fileName,
                                 java.io.File rootDir)

      Deprecated. since 1.4.x
      Return the canonical form of a filename.

      If the specified file name is relative it is resolved with respect to the given root directory.

      Parameters:
        `fileName` - The name of the file to resolve. Must not be `null`.
        `rootDir` - The directory respective to which relative file names are resolved. May be `null`, in which case the current directory is used.
      Returns:
        the resolved File.

    - #### resolveFile

          public java.io.File resolveFile(java.lang.String fileName)

      Return the canonical form of a filename.

      If the specified file name is relative it is resolved with respect to the project's base directory.

      Parameters:
        `fileName` - The name of the file to resolve. Must not be `null`.
      Returns:
        the resolved File.

    - #### translatePath

          public static java.lang.String translatePath(java.lang.String toProcess)

      Deprecated. since 1.7 Use FileUtils.translatePath instead.
      Translate a path into its native (platform specific) format.

      This method uses PathTokenizer to separate the input path into its components. This handles DOS style paths in a relatively sensible way. The file separators are then converted to their platform specific versions.

      Parameters:
        `toProcess` - The path to be translated. May be `null`.
      Returns:
        the native version of the specified path or an empty string if the path is `null` or empty.
      See Also:
        `PathTokenizer`

    - #### copyFile

          public void copyFile(java.lang.String sourceFile,
                      java.lang.String destFile)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination. No filtering is performed.
      Parameters:
        `sourceFile` - Name of file to copy from. Must not be `null`.
        `destFile` - Name of file to copy to. Must not be `null`.
      Throws:
        `java.io.IOException` - if the copying fails.

    - #### copyFile

          public void copyFile(java.lang.String sourceFile,
                      java.lang.String destFile,
                      boolean filtering)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination specifying if token filtering should be used.
      Parameters:
        `sourceFile` - Name of file to copy from. Must not be `null`.
        `destFile` - Name of file to copy to. Must not be `null`.
        `filtering` - Whether or not token filtering should be used during the copy.
      Throws:
        `java.io.IOException` - if the copying fails.

    - #### copyFile

          public void copyFile(java.lang.String sourceFile,
                      java.lang.String destFile,
                      boolean filtering,
                      boolean overwrite)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination specifying if token filtering should be used and if source files may overwrite newer destination files.
      Parameters:
        `sourceFile` - Name of file to copy from. Must not be `null`.
        `destFile` - Name of file to copy to. Must not be `null`.
        `filtering` - Whether or not token filtering should be used during the copy.
        `overwrite` - Whether or not the destination file should be overwritten if it already exists.
      Throws:
        `java.io.IOException` - if the copying fails.

    - #### copyFile

          public void copyFile(java.lang.String sourceFile,
                      java.lang.String destFile,
                      boolean filtering,
                      boolean overwrite,
                      boolean preserveLastModified)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination specifying if token filtering should be used, if source files may overwrite newer destination files, and if the last modified time of the resulting file should be set to that of the source file.
      Parameters:
        `sourceFile` - Name of file to copy from. Must not be `null`.
        `destFile` - Name of file to copy to. Must not be `null`.
        `filtering` - Whether or not token filtering should be used during the copy.
        `overwrite` - Whether or not the destination file should be overwritten if it already exists.
        `preserveLastModified` - Whether or not the last modified time of the resulting file should be set to that of the source file.
      Throws:
        `java.io.IOException` - if the copying fails.

    - #### copyFile

          public void copyFile(java.io.File sourceFile,
                      java.io.File destFile)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination. No filtering is performed.
      Parameters:
        `sourceFile` - File to copy from. Must not be `null`.
        `destFile` - File to copy to. Must not be `null`.
      Throws:
        `java.io.IOException` - if the copying fails.

    - #### copyFile

          public void copyFile(java.io.File sourceFile,
                      java.io.File destFile,
                      boolean filtering)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination specifying if token filtering should be used.
      Parameters:
        `sourceFile` - File to copy from. Must not be `null`.
        `destFile` - File to copy to. Must not be `null`.
        `filtering` - Whether or not token filtering should be used during the copy.
      Throws:
        `java.io.IOException` - if the copying fails.

    - #### copyFile

          public void copyFile(java.io.File sourceFile,
                      java.io.File destFile,
                      boolean filtering,
                      boolean overwrite)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination specifying if token filtering should be used and if source files may overwrite newer destination files.
      Parameters:
        `sourceFile` - File to copy from. Must not be `null`.
        `destFile` - File to copy to. Must not be `null`.
        `filtering` - Whether or not token filtering should be used during the copy.
        `overwrite` - Whether or not the destination file should be overwritten if it already exists.
      Throws:
        `java.io.IOException` - if the file cannot be copied.

    - #### copyFile

          public void copyFile(java.io.File sourceFile,
                      java.io.File destFile,
                      boolean filtering,
                      boolean overwrite,
                      boolean preserveLastModified)
                        throws java.io.IOException

      Deprecated. since 1.4.x
      Convenience method to copy a file from a source to a destination specifying if token filtering should be used, if source files may overwrite newer destination files, and if the last modified time of the resulting file should be set to that of the source file.
      Parameters:
        `sourceFile` - File to copy from. Must not be `null`.
        `destFile` - File to copy to. Must not be `null`.
        `filtering` - Whether or not token filtering should be used during the copy.
        `overwrite` - Whether or not the destination file should be overwritten if it already exists.
        `preserveLastModified` - Whether or not the last modified time of the resulting file should be set to that of the source file.
      Throws:
        `java.io.IOException` - if the file cannot be copied.

    - #### setFileLastModified

          public void setFileLastModified(java.io.File file,
                                 long time)
                                   throws BuildException

      Deprecated. since 1.4.x
      Call File.setLastModified(long time) on Java above 1.1, and logs a warning on Java 1.1.
      Parameters:
        `file` - The file to set the last modified time on. Must not be `null`.
        `time` - the required modification time.
      Throws:
        `BuildException` - if the last modified time cannot be set despite running on a platform with a version above 1.1.

    - #### toBoolean

          public static boolean toBoolean(java.lang.String s)

      Return the boolean equivalent of a string, which is considered `true` if either `"on"`, `"true"`, or `"yes"` is found, ignoring case.
      Parameters:
        `s` - The string to convert to a boolean value.
      Returns:
        `true` if the given string is `"on"`, `"true"` or `"yes"`, or `false` otherwise.

    - #### getProject

          public static Project getProject(java.lang.Object o)

      Get the Project instance associated with the specified object.
      Parameters:
        `o` - the object to query.
      Returns:
        Project instance, if any.
      Since:
        Ant 1.7.1

    - #### topoSort

          public final java.util.Vector topoSort(java.lang.String root,
                                  java.util.Hashtable targetTable)
                                          throws BuildException

      Topologically sort a set of targets. Equivalent to calling `topoSort(new String[] {root}, targets, true)`.
      Parameters:
        `root` - The name of the root target. The sort is created in such a way that the sequence of Targets up to the root target is the minimum possible such sequence. Must not be `null`.
        `targetTable` - A Hashtable mapping names to Targets. Must not be `null`.
      Returns:
        a Vector of ALL Target objects in sorted order.
      Throws:
        `BuildException` - if there is a cyclic dependency among the targets, or if a named target does not exist.

    - #### topoSort

          public final java.util.Vector topoSort(java.lang.String root,
                                  java.util.Hashtable targetTable,
                                  boolean returnAll)
                                          throws BuildException

      Topologically sort a set of targets. Equivalent to calling `topoSort(new String[] {root}, targets, returnAll)`.
      Parameters:
        `root` - The name of the root target. The sort is created in such a way that the sequence of Targets up to the root target is the minimum possible such sequence. Must not be `null`.
        `targetTable` - A Hashtable mapping names to Targets. Must not be `null`.
        `returnAll` - `boolean` indicating whether to return all targets, or the execution sequence only.
      Returns:
        a Vector of Target objects in sorted order.
      Throws:
        `BuildException` - if there is a cyclic dependency among the targets, or if a named target does not exist.
      Since:
        Ant 1.6.3

    - #### topoSort

          public final java.util.Vector topoSort(java.lang.String[] root,
                                  java.util.Hashtable targetTable,
                                  boolean returnAll)
                                          throws BuildException

      Topologically sort a set of targets.
      Parameters:
        `root` - `String[]` containing the names of the root targets. The sort is created in such a way that the ordered sequence of Targets is the minimum possible such sequence to the specified root targets. Must not be `null`.
        `targetTable` - A map of names to targets (String to Target). Must not be `null`.
        `returnAll` - `boolean` indicating whether to return all targets, or the execution sequence only.
      Returns:
        a Vector of Target objects in sorted order.
      Throws:
        `BuildException` - if there is a cyclic dependency among the targets, or if a named target does not exist.
      Since:
        Ant 1.6.3

    - #### inheritIDReferences

          public void inheritIDReferences(Project parent)

      Inherit the id references.
      Parameters:
        `parent` - the parent project of this project.

    - #### addIdReference

          public void addIdReference(java.lang.String id,
                            java.lang.Object value)

      Add an id reference. Used for broken build files.
      Parameters:
        `id` - the id to set.
        `value` - the value to set it to (Unknown element in this case.

    - #### addReference

          public void addReference(java.lang.String referenceName,
                          java.lang.Object value)

      Add a reference to the project.
      Parameters:
        `referenceName` - The name of the reference. Must not be `null`.
        `value` - The value of the reference.

    - #### getReferences

          public java.util.Hashtable getReferences()

      Return a map of the references in the project (String to Object). The returned hashtable is "live" and so must not be modified.
      Returns:
        a map of the references in the project (String to Object).

    - #### hasReference

          public boolean hasReference(java.lang.String key)

      Does the project know this reference?
      Since:
        Ant 1.8.0

    - #### getCopyOfReferences

          public java.util.Map getCopyOfReferences()

      Return a map of the references in the project (String to Object). The returned hashtable is a copy of the "live" references.
      Returns:
        a map of the references in the project (String to Object).
      Since:
        Ant 1.8.1

    - #### getReference

          public java.lang.Object getReference(java.lang.String key)

      Look up a reference by its key (ID).
      Parameters:
        `key` - The key for the desired reference. Must not be `null`.
      Returns:
        the reference with the specified ID, or `null` if there is no such reference in the project.

    - #### getElementName

          public java.lang.String getElementName(java.lang.Object element)

      Return a description of the type of the given element, with special handling for instances of tasks and data types.

      This is useful for logging purposes.

      Parameters:
        `element` - The element to describe. Must not be `null`.
      Returns:
        a description of the element type.
      Since:
        1.95, Ant 1.5

    - #### fireBuildStarted

          public void fireBuildStarted()

      Send a "build started" event to the build listeners for this project.

    - #### fireBuildFinished

          public void fireBuildFinished(java.lang.Throwable exception)

      Send a "build finished" event to the build listeners for this project.
      Parameters:
        `exception` - an exception indicating a reason for a build failure. May be `null`, indicating a successful build.

    - #### fireSubBuildStarted

          public void fireSubBuildStarted()

      Send a "subbuild started" event to the build listeners for this project.
      Since:
        Ant 1.6.2

    - #### fireSubBuildFinished

          public void fireSubBuildFinished(java.lang.Throwable exception)

      Send a "subbuild finished" event to the build listeners for this project.
      Parameters:
        `exception` - an exception indicating a reason for a build failure. May be `null`, indicating a successful build.
      Since:
        Ant 1.6.2

    - #### fireTargetStarted

          protected void fireTargetStarted(Target target)

      Send a "target started" event to the build listeners for this project.
      Parameters:
        `target` - The target which is starting to build. Must not be `null`.

    - #### fireTargetFinished

          protected void fireTargetFinished(Target target,
                                java.lang.Throwable exception)

      Send a "target finished" event to the build listeners for this project.
      Parameters:
        `target` - The target which has finished building. Must not be `null`.
        `exception` - an exception indicating a reason for a build failure. May be `null`, indicating a successful build.

    - #### fireTaskStarted

          protected void fireTaskStarted(Task task)

      Send a "task started" event to the build listeners for this project.
      Parameters:
        `task` - The target which is starting to execute. Must not be `null`.

    - #### fireTaskFinished

          protected void fireTaskFinished(Task task,
                              java.lang.Throwable exception)

      Send a "task finished" event to the build listeners for this project.
      Parameters:
        `task` - The task which has finished executing. Must not be `null`.
        `exception` - an exception indicating a reason for a build failure. May be `null`, indicating a successful build.

    - #### fireMessageLogged

          protected void fireMessageLogged(Project project,
                               java.lang.String message,
                               int priority)

      Send a "message logged" project level event to the build listeners for this project.
      Parameters:
        `project` - The project generating the event. Should not be `null`.
        `message` - The message to send. Should not be `null`.
        `priority` - The priority of the message.

    - #### fireMessageLogged

          protected void fireMessageLogged(Project project,
                               java.lang.String message,
                               java.lang.Throwable throwable,
                               int priority)

      Send a "message logged" project level event to the build listeners for this project.
      Parameters:
        `project` - The project generating the event. Should not be `null`.
        `message` - The message to send. Should not be `null`.
        `throwable` - The exception that caused this message. May be `null`.
        `priority` - The priority of the message.
      Since:
        1.7

    - #### fireMessageLogged

          protected void fireMessageLogged(Target target,
                               java.lang.String message,
                               int priority)

      Send a "message logged" target level event to the build listeners for this project.
      Parameters:
        `target` - The target generating the event. Must not be `null`.
        `message` - The message to send. Should not be `null`.
        `priority` - The priority of the message.

    - #### fireMessageLogged

          protected void fireMessageLogged(Target target,
                               java.lang.String message,
                               java.lang.Throwable throwable,
                               int priority)

      Send a "message logged" target level event to the build listeners for this project.
      Parameters:
        `target` - The target generating the event. Must not be `null`.
        `message` - The message to send. Should not be `null`.
        `throwable` - The exception that caused this message. May be `null`.
        `priority` - The priority of the message.
      Since:
        1.7

    - #### fireMessageLogged

          protected void fireMessageLogged(Task task,
                               java.lang.String message,
                               int priority)

      Send a "message logged" task level event to the build listeners for this project.
      Parameters:
        `task` - The task generating the event. Must not be `null`.
        `message` - The message to send. Should not be `null`.
        `priority` - The priority of the message.

    - #### fireMessageLogged

          protected void fireMessageLogged(Task task,
                               java.lang.String message,
                               java.lang.Throwable throwable,
                               int priority)

      Send a "message logged" task level event to the build listeners for this project.
      Parameters:
        `task` - The task generating the event. Must not be `null`.
        `message` - The message to send. Should not be `null`.
        `throwable` - The exception that caused this message. May be `null`.
        `priority` - The priority of the message.
      Since:
        1.7

    - #### registerThreadTask

          public void registerThreadTask(java.lang.Thread thread,
                                Task task)

      Register a task as the current task for a thread. If the task is null, the thread's entry is removed.
      Parameters:
        `thread` - the thread on which the task is registered.
        `task` - the task to be registered.
      Since:
        Ant 1.5

    - #### getThreadTask

          public Task getThreadTask(java.lang.Thread thread)

      Get the current task associated with a thread, if any.
      Parameters:
        `thread` - the thread for which the task is required.
      Returns:
        the task which is currently registered for the given thread or null if no task is registered.

    - #### setProjectReference

          public final void setProjectReference(java.lang.Object obj)

      Set a reference to this Project on the parameterized object. Need to set the project before other set/add elements are called.
      Parameters:
        `obj` - the object to invoke setProject(this) on.

    - #### getResource

          public Resource getResource(java.lang.String name)

      Resolve the file relative to the project's basedir and return it as a FileResource.
      Specified by:
        `getResource` in interface `ResourceFactory`
      Parameters:
        `name` - the name of the file to resolve.
      Returns:
        the file resource.
      Since:
        Ant 1.7