## org.springframework.web.servlet.view.document
Class AbstractPdfStamperView

    java.lang.Object
      org.springframework.context.support.ApplicationObjectSupport
          org.springframework.web.context.support.WebApplicationObjectSupport
              org.springframework.web.servlet.view.AbstractView
                  org.springframework.web.servlet.view.AbstractUrlBasedView
                      org.springframework.web.servlet.view.document.AbstractPdfStamperView

All Implemented Interfaces:
  Aware, BeanNameAware, InitializingBean, ApplicationContextAware, ServletContextAware, View

    public abstract class AbstractPdfStamperView

extends AbstractUrlBasedView

Abstract superclass for PDF views that operate on an existing document with an AcroForm. Application-specific view classes will extend this class to merge the PDF form with model data.

Thanks to Bryant Larsen for the suggestion and the original prototype!

Since:
  2.5.4
Author:
  Juergen Hoeller
See Also:
  `AbstractPdfView`

Field Summary

Fields inherited from class org.springframework.web.servlet.view.AbstractView
`DEFAULT_CONTENT_TYPE`

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport
`logger`

Fields inherited from interface org.springframework.web.servlet.View
`PATH_VARIABLES, RESPONSE_STATUS_ATTRIBUTE`

Constructor Summary
`AbstractPdfStamperView()`

Method Summary
`protected boolean` `generatesDownloadContent()` Return whether this view generates download content (typically binary content like PDF or Excel files).
`protected abstract void` `mergePdfDocument(Map<String,Object> model, com.lowagie.text.pdf.PdfStamper stamper, HttpServletRequest request, HttpServletResponse response)` Subclasses must implement this method to merge the PDF form with the given model data.
`protected com.lowagie.text.pdf.PdfReader` `readPdfResource()` Read the raw PDF resource into an iText PdfReader.
`protected void` `renderMergedOutputModel(Map<String,Object> model, HttpServletRequest request, HttpServletResponse response)` Subclasses must implement this method to actually render the view.

Methods inherited from class org.springframework.web.servlet.view.AbstractUrlBasedView
`afterPropertiesSet, checkResource, getUrl, isUrlRequired, setUrl, toString`

Methods inherited from class org.springframework.web.servlet.view.AbstractView

`addStaticAttribute, createMergedOutputModel, createRequestContext, createTemporaryOutputStream, exposeModelAsRequestAttributes, getAttributesMap, getBeanName, getContentType, getRequestContextAttribute, getStaticAttributes, isExposePathVariables, prepareResponse, render, setAttributes, setAttributesCSV, setAttributesMap, setBeanName, setContentType, setExposePathVariables, setRequestContextAttribute, writeToResponse`

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport
`getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext`

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport
`getApplicationContext, getMessageSourceAccessor, initApplicationContext, requiredContextClass, setApplicationContext`

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

Constructor Detail

### AbstractPdfStamperView

    public AbstractPdfStamperView()

Method Detail

### generatesDownloadContent

    protected boolean generatesDownloadContent()

  Description copied from class: `AbstractView`
  Return whether this view generates download content (typically binary content like PDF or Excel files).

  The default implementation returns `false`. Subclasses are encouraged to return `true` here if they know that they are generating download content that requires temporary caching on the client side, typically via the response OutputStream.

  Overrides:
    `generatesDownloadContent` in class `AbstractView`
  See Also:
    `AbstractView.prepareResponse(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)`, `ServletResponse.getOutputStream()`

### renderMergedOutputModel

    protected final void renderMergedOutputModel(Map<String,Object> model,
                                                 HttpServletRequest request,
                                                 HttpServletResponse response)
                                          throws Exception

  Description copied from class: `AbstractView`
  Subclasses must implement this method to actually render the view.

  The first step will be preparing the request: In the JSP case, this would mean setting model objects as request attributes. The second step will be the actual rendering of the view, for example including the JSP via a RequestDispatcher.

  Specified by:
    `renderMergedOutputModel` in class `AbstractView`
  Parameters:
    `model` - combined output Map (never `null`), with dynamic values taking precedence over static attributes
    `request` - current HTTP request
    `response` - current HTTP response
  Throws:
    `Exception` - if rendering failed

### readPdfResource

    protected com.lowagie.text.pdf.PdfReader readPdfResource()
                                                      throws IOException

  Read the raw PDF resource into an iText PdfReader.

  The default implementation resolve the specified "url" property as ApplicationContext resource.

  Returns:
    the PdfReader instance
  Throws:
    `IOException` - if resource access failed
  See Also:
    `AbstractUrlBasedView.setUrl(java.lang.String)`

### mergePdfDocument

    protected abstract void mergePdfDocument(Map<String,Object> model,
                                             com.lowagie.text.pdf.PdfStamper stamper,
                                             HttpServletRequest request,
                                             HttpServletResponse response)
                                      throws Exception

  Subclasses must implement this method to merge the PDF form with the given model data.

  This is where you are able to set values on the AcroForm. An example of what can be done at this level is:

       // get the form from the document
       AcroFields form = stamper.getAcroFields();

       // set some values on the form
       form.setField("field1", "value1");
       form.setField("field2", "Vvlue2");

       // set the disposition and filename
       response.setHeader("Content-disposition", "attachment; FILENAME=someName.pdf");

  Note that the passed-in HTTP response is just supposed to be used for setting cookies or other HTTP headers. The built PDF document itself will automatically get written to the response after this method returns.

  Parameters:
    `model` - the model Map
    `stamper` - the PdfStamper instance that will contain the AcroFields. You may also customize this PdfStamper instance according to your needs, e.g. setting the "formFlattening" property.
    `request` - in case we need locale etc. Shouldn't look at attributes.
    `response` - in case we need to set cookies. Shouldn't write to it.
  Throws:
    `Exception` - any exception that occured during document building