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## org.dom4j.io
Class SAXWriter

    java.lang.Object
      org.dom4j.io.SAXWriter

All Implemented Interfaces:
  XMLReader

public class SAXWriter
extends Object
implements XMLReader

`SAXWriter` writes a DOM4J tree to a SAX ContentHandler.

Version:
  $Revision: 1.24 $
Author:
  James Strachan

Field Summary
`protected static String` | `FEATURE_NAMESPACE_PREFIXES`
`protected static String` | `FEATURE_NAMESPACES`
`protected static String[]` | `LEXICAL_HANDLER_NAMES`

Constructor Summary
`SAXWriter()`
`SAXWriter(ContentHandler contentHandler)`
`SAXWriter(ContentHandler contentHandler, LexicalHandler lexicalHandler)`
`SAXWriter(ContentHandler contentHandler, LexicalHandler lexicalHandler, EntityResolver entityResolver)`

Method Summary
`protected AttributesImpl` | `addNamespaceAttribute(AttributesImpl attrs, Namespace namespace)` If isDelcareNamespaceAttributes() is enabled then this method will add the given namespace declaration to the supplied attributes object, creating one if it does not exist.
`protected void` | `checkForNullHandlers()` Ensures non-null content handlers?
`protected Attributes` | `createAttributes(Element element, Attributes namespaceAttributes)`
`protected void` | `documentLocator(Document document)` The `Locator`is only really useful when parsing a textual document as its main purpose is to identify the line and column number.
`protected void` | `dtdHandler(Document document)` We do not yet support DTD or XML Schemas so this method does nothing right now.
`protected void` | `endDocument()`
`protected void` | `endElement(Element element)`
`protected void` | `endPrefixMapping(NamespaceStack stack, int stackSize)` Fires a SAX endPrefixMapping event for all the namespaceStack which have gone out of scope
`protected void` | `entityResolver(Document document)`
`ContentHandler` | `getContentHandler()` DOCUMENT ME!
`DTDHandler` | `getDTDHandler()` DOCUMENT ME!
`EntityResolver` | `getEntityResolver()` DOCUMENT ME!
`ErrorHandler` | `getErrorHandler()` DOCUMENT ME!
`boolean` | `getFeature(String name)` Looks up the value of a feature.
`LexicalHandler` | `getLexicalHandler()` DOCUMENT ME!
`Object` | `getProperty(String name)` Gets the given SAX property
`boolean` | `isDeclareNamespaceAttributes()` Should namespace declarations be converted to "xmlns" attributes.
`protected boolean` | `isIgnoreableNamespace(Namespace namespace, NamespaceStack namespaceStack)` DOCUMENT ME!
`void` | `parse(InputSource input)` Parses an XML document.
`void` | `parse(String systemId)` This method is not supported.
`void` | `setContentHandler(ContentHandler contentHandler)` Sets the `ContentHandler` called when SAX events are raised
`void` | `setDeclareNamespaceAttributes(boolean declareNamespaceAttrs)` Sets whether namespace declarations should be exported as "xmlns" attributes or not.
`void` | `setDTDHandler(DTDHandler handler)` Sets the `DTDHandler`.
`void` | `setEntityResolver(EntityResolver entityResolver)` Sets the `EntityResolver`.
`void` | `setErrorHandler(ErrorHandler errorHandler)` Sets the `ErrorHandler`.
`void` | `setFeature(String name, boolean value)` This implementation does actually use any features but just stores them for later retrieval
`void` | `setLexicalHandler(LexicalHandler lexicalHandler)` Sets the `LexicalHandler`.
`void` | `setProperty(String name, Object value)` Sets the given SAX property
`void` | `setXMLReader(XMLReader xmlReader)` Sets the `XMLReader` used to write SAX events to
`protected void` | `startDocument()`
`protected void` | `startElement(Element element, AttributesImpl namespaceAttributes)`
`protected AttributesImpl` | `startPrefixMapping(Element element, NamespaceStack namespaceStack)` Fires a SAX startPrefixMapping event for all the namespaceStack which have just come into scope
`void` | `write(CDATA cdata)` Generates SAX events for the given CDATA
`void` | `write(Comment comment)` Generates SAX events for the given Comment
`void` | `write(Document document)` Generates SAX events for the given Document and all its content
`void` | `write(Element element)` Generates SAX events for the given Element and all its content
`protected void` | `write(Element element, NamespaceStack namespaceStack)`
`void` | `write(Entity entity)` Generates SAX events for the given Entity
`void` | `write(Node node)` A polymorphic method to write any Node to this SAX stream
`void` | `write(ProcessingInstruction pi)` Generates SAX events for the given ProcessingInstruction
`void` | `write(String text)` Generates SAX events for the given text
`void` | `writeClose(Element element)` Writes the closing tag of an `Element`
`protected void` | `writeContent(Branch branch, NamespaceStack namespaceStack)`
`void` | `writeOpen(Element element)` Writes the opening tag of an `Element`, including its `Attribute`s but without its content.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### LEXICAL_HANDLER_NAMES

    protected static final String[] LEXICAL_HANDLER_NAMES

### FEATURE_NAMESPACE_PREFIXES

    protected static final String FEATURE_NAMESPACE_PREFIXES

See Also:
  Constant Field Values

### FEATURE_NAMESPACES

    protected static final String FEATURE_NAMESPACES

See Also:
  Constant Field Values

Constructor Detail

### SAXWriter

    public SAXWriter()

### SAXWriter

    public SAXWriter(ContentHandler contentHandler)

### SAXWriter

    public SAXWriter(ContentHandler contentHandler,
                     LexicalHandler lexicalHandler)

### SAXWriter

    public SAXWriter(ContentHandler contentHandler,
                     LexicalHandler lexicalHandler,
                     EntityResolver entityResolver)

Method Detail

### write

    public void write(Node node)
               throws SAXException

  A polymorphic method to write any Node to this SAX stream

  Parameters:
    `node` - DOCUMENT ME!
  Throws:
    `SAXException` - DOCUMENT ME!

### write

    public void write(Document document)
               throws SAXException

  Generates SAX events for the given Document and all its content

  Parameters:
    `document` - is the Document to parse
  Throws:
    `SAXException` - if there is a SAX error processing the events

### write

    public void write(Element element)
               throws SAXException

  Generates SAX events for the given Element and all its content

  Parameters:
    `element` - is the Element to parse
  Throws:
    `SAXException` - if there is a SAX error processing the events

### writeOpen

    public void writeOpen(Element element)
                   throws SAXException

  Writes the opening tag of an `Element`, including its `Attribute`s but without its content.

  Parameters:
    `element` - `Element` to output.
  Throws:
    `SAXException` - DOCUMENT ME!

### writeClose

    public void writeClose(Element element)
                    throws SAXException

  Writes the closing tag of an `Element`

  Parameters:
    `element` - `Element` to output.
  Throws:
    `SAXException` - DOCUMENT ME!

### write

    public void write(String text)
               throws SAXException

  Generates SAX events for the given text

  Parameters:
    `text` - is the text to send to the SAX ContentHandler
  Throws:
    `SAXException` - if there is a SAX error processing the events

### write

    public void write(CDATA cdata)
               throws SAXException

  Generates SAX events for the given CDATA

  Parameters:
    `cdata` - is the CDATA to parse
  Throws:
    `SAXException` - if there is a SAX error processing the events

### write

    public void write(Comment comment)
               throws SAXException

  Generates SAX events for the given Comment

  Parameters:
    `comment` - is the Comment to parse
  Throws:
    `SAXException` - if there is a SAX error processing the events

### write

    public void write(Entity entity)
               throws SAXException

  Generates SAX events for the given Entity

  Parameters:
    `entity` - is the Entity to parse
  Throws:
    `SAXException` - if there is a SAX error processing the events

### write

    public void write(ProcessingInstruction pi)
               throws SAXException

  Generates SAX events for the given ProcessingInstruction

  Parameters:
    `pi` - is the ProcessingInstruction to parse
  Throws:
    `SAXException` - if there is a SAX error processing the events

### isDeclareNamespaceAttributes

    public boolean isDeclareNamespaceAttributes()

  Should namespace declarations be converted to "xmlns" attributes. This property defaults to `false` as per the SAX specification. This property is set via the SAX feature "http://xml.org/sax/features/namespace-prefixes"

  Returns:
    DOCUMENT ME!

### setDeclareNamespaceAttributes

    public void setDeclareNamespaceAttributes(boolean declareNamespaceAttrs)

  Sets whether namespace declarations should be exported as "xmlns" attributes or not. This property is set from the SAX feature "http://xml.org/sax/features/namespace-prefixes"

  Parameters:
    `declareNamespaceAttrs` - DOCUMENT ME!

### getContentHandler

    public ContentHandler getContentHandler()

  DOCUMENT ME!

  Specified by:
    `getContentHandler` in interface `XMLReader`
  Returns:
    the `ContentHandler` called when SAX events are raised

### setContentHandler

    public void setContentHandler(ContentHandler contentHandler)

  Sets the `ContentHandler` called when SAX events are raised

  Specified by:
    `setContentHandler` in interface `XMLReader`
  Parameters:
    `contentHandler` - is the `ContentHandler` called when SAX events are raised

### getDTDHandler

    public DTDHandler getDTDHandler()

  DOCUMENT ME!

  Specified by:
    `getDTDHandler` in interface `XMLReader`
  Returns:
    the `DTDHandler`

### setDTDHandler

    public void setDTDHandler(DTDHandler handler)

  Sets the `DTDHandler`.

  Specified by:
    `setDTDHandler` in interface `XMLReader`
  Parameters:
    `handler` - DOCUMENT ME!

### getErrorHandler

    public ErrorHandler getErrorHandler()

  DOCUMENT ME!

  Specified by:
    `getErrorHandler` in interface `XMLReader`
  Returns:
    the `ErrorHandler`

### setErrorHandler

    public void setErrorHandler(ErrorHandler errorHandler)

  Sets the `ErrorHandler`.

  Specified by:
    `setErrorHandler` in interface `XMLReader`
  Parameters:
    `errorHandler` - DOCUMENT ME!

### getEntityResolver

    public EntityResolver getEntityResolver()

  DOCUMENT ME!

  Specified by:
    `getEntityResolver` in interface `XMLReader`
  Returns:
    the `EntityResolver` used when a Document contains a DTD

### setEntityResolver

    public void setEntityResolver(EntityResolver entityResolver)

  Sets the `EntityResolver`.

  Specified by:
    `setEntityResolver` in interface `XMLReader`
  Parameters:
    `entityResolver` - is the `EntityResolver`

### getLexicalHandler

    public LexicalHandler getLexicalHandler()

  DOCUMENT ME!

  Returns:
    the `LexicalHandler` used when a Document contains a DTD

### setLexicalHandler

    public void setLexicalHandler(LexicalHandler lexicalHandler)

  Sets the `LexicalHandler`.

  Parameters:
    `lexicalHandler` - is the `LexicalHandler`

### setXMLReader

    public void setXMLReader(XMLReader xmlReader)

  Sets the `XMLReader` used to write SAX events to

  Parameters:
    `xmlReader` - is the `XMLReader`

### getFeature

    public boolean getFeature(String name)
                       throws SAXNotRecognizedException,
                              SAXNotSupportedException

  Looks up the value of a feature.

  Specified by:
    `getFeature` in interface `XMLReader`
  Parameters:
    `name` - DOCUMENT ME!
  Returns:
    DOCUMENT ME!
  Throws:
    `SAXNotRecognizedException` - DOCUMENT ME!
    `SAXNotSupportedException` - DOCUMENT ME!

### setFeature

    public void setFeature(String name,
                           boolean value)
                    throws SAXNotRecognizedException,
                           SAXNotSupportedException

  This implementation does actually use any features but just stores them for later retrieval

  Specified by:
    `setFeature` in interface `XMLReader`
  Parameters:
    `name` - DOCUMENT ME!
    `value` - DOCUMENT ME!
  Throws:
    `SAXNotRecognizedException` - DOCUMENT ME!
    `SAXNotSupportedException` - DOCUMENT ME!

### setProperty

    public void setProperty(String name,
                            Object value)

  Sets the given SAX property

  Specified by:
    `setProperty` in interface `XMLReader`
  Parameters:
    `name` - DOCUMENT ME!
    `value` - DOCUMENT ME!

### getProperty

    public Object getProperty(String name)
                       throws SAXNotRecognizedException,
                              SAXNotSupportedException

  Gets the given SAX property

  Specified by:
    `getProperty` in interface `XMLReader`
  Parameters:
    `name` - DOCUMENT ME!
  Returns:
    DOCUMENT ME!
  Throws:
    `SAXNotRecognizedException` - DOCUMENT ME!
    `SAXNotSupportedException` - DOCUMENT ME!

### parse

    public void parse(String systemId)
               throws SAXNotSupportedException

  This method is not supported.

  Specified by:
    `parse` in interface `XMLReader`
  Parameters:
    `systemId` - DOCUMENT ME!
  Throws:
    `SAXNotSupportedException` - DOCUMENT ME!

### parse

    public void parse(InputSource input)
               throws SAXException

  Parses an XML document. This method can only accept DocumentInputSource inputs otherwise a `SAXNotSupportedException`exception is thrown.

  Specified by:
    `parse` in interface `XMLReader`
  Parameters:
    `input` - DOCUMENT ME!
  Throws:
    `SAXException` - DOCUMENT ME!
    `SAXNotSupportedException` - if the input source is not wrapping a dom4j document

### writeContent

    protected void writeContent(Branch branch,
                                NamespaceStack namespaceStack)
                         throws SAXException

  Throws:
    `SAXException`

### documentLocator

    protected void documentLocator(Document document)
                            throws SAXException

  The `Locator`is only really useful when parsing a textual document as its main purpose is to identify the line and column number. Since we are processing an in memory tree which will probably have its line number information removed, we'll just use -1 for the line and column numbers.

  Parameters:
    `document` - DOCUMENT ME!
  Throws:
    `SAXException` - DOCUMENT ME!

### entityResolver

    protected void entityResolver(Document document)
                           throws SAXException

  Throws:
    `SAXException`

### dtdHandler

    protected void dtdHandler(Document document)
                       throws SAXException

  We do not yet support DTD or XML Schemas so this method does nothing right now.

  Parameters:
    `document` - DOCUMENT ME!
  Throws:
    `SAXException` - DOCUMENT ME!

### startDocument

    protected void startDocument()
                          throws SAXException

  Throws:
    `SAXException`

### endDocument

    protected void endDocument()
                        throws SAXException

  Throws:
    `SAXException`

### write

    protected void write(Element element,
                         NamespaceStack namespaceStack)
                  throws SAXException

  Throws:
    `SAXException`

### startPrefixMapping

    protected AttributesImpl startPrefixMapping(Element element,
                                                NamespaceStack namespaceStack)
                                         throws SAXException

  Fires a SAX startPrefixMapping event for all the namespaceStack which have just come into scope

  Parameters:
    `element` - DOCUMENT ME!
    `namespaceStack` - DOCUMENT ME!
  Returns:
    DOCUMENT ME!
  Throws:
    `SAXException` - DOCUMENT ME!

### endPrefixMapping

    protected void endPrefixMapping(NamespaceStack stack,
                                    int stackSize)
                             throws SAXException

  Fires a SAX endPrefixMapping event for all the namespaceStack which have gone out of scope

  Parameters:
    `stack` - DOCUMENT ME!
    `stackSize` - DOCUMENT ME!
  Throws:
    `SAXException` - DOCUMENT ME!

### startElement

    protected void startElement(Element element,
                                AttributesImpl namespaceAttributes)
                         throws SAXException

  Throws:
    `SAXException`

### endElement

    protected void endElement(Element element)
                       throws SAXException

  Throws:
    `SAXException`

### createAttributes

    protected Attributes createAttributes(Element element,
                                          Attributes namespaceAttributes)
                                   throws SAXException

  Throws:
    `SAXException`

### addNamespaceAttribute

    protected AttributesImpl addNamespaceAttribute(AttributesImpl attrs,
                                                   Namespace namespace)

  If isDelcareNamespaceAttributes() is enabled then this method will add the given namespace declaration to the supplied attributes object, creating one if it does not exist.

  Parameters:
    `attrs` - DOCUMENT ME!
    `namespace` - DOCUMENT ME!
  Returns:
    DOCUMENT ME!

### isIgnoreableNamespace

    protected boolean isIgnoreableNamespace(Namespace namespace,
                                            NamespaceStack namespaceStack)

  DOCUMENT ME!

  Parameters:
    `namespace` - DOCUMENT ME!
    `namespaceStack` - DOCUMENT ME!
  Returns:
    true if the given namespace is an ignorable namespace (such as Namespace.NO_NAMESPACE or Namespace.XML_NAMESPACE) or if the namespace has already been declared in the current scope

### checkForNullHandlers

    protected void checkForNullHandlers()

  Ensures non-null content handlers?

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