Class AbstractPdfStamperView

  extended by
      extended by
          extended by org.springframework.web.servlet.view.AbstractView
              extended by org.springframework.web.servlet.view.AbstractUrlBasedView
                  extended by org.springframework.web.servlet.view.document.AbstractPdfStamperView
All Implemented Interfaces:
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!

Juergen Hoeller
See Also:

Field Summary
Fields inherited from class org.springframework.web.servlet.view.AbstractView
Fields inherited from class
Constructor Summary
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 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 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, getUrl, isUrlRequired, setUrl, toString
Methods inherited from class org.springframework.web.servlet.view.AbstractView
addStaticAttribute, createRequestContext, createTemporaryOutputStream, exposeModelAsRequestAttributes, getAttributesMap, getBeanName, getContentType, getRequestContextAttribute, getStaticAttributes, prepareResponse, render, setAttributes, setAttributesCSV, setAttributesMap, setBeanName, setContentType, setRequestContextAttribute, writeToResponse
Methods inherited from class
getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext
Methods inherited from class
getApplicationContext, getMessageSourceAccessor, initApplicationContext, requiredContextClass, setApplicationContext
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail


public AbstractPdfStamperView()
Method Detail


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.

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


protected final void renderMergedOutputModel(Map 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
model - combined output Map (never null), with dynamic values taking precedence over static attributes
request - current HTTP request
response - current HTTP response
Exception - if rendering failed


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.

the PdfReader instance
IOException - if resource access failed
See Also:


protected abstract void mergePdfDocument(Map 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.

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.
Exception - any exception that occured during document building

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