org.springframework.web.servlet.view.document
Class AbstractPdfView

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.document.AbstractPdfView

All Implemented Interfaces:

ApplicationContextAware, BeanNameAware, View

public abstract class AbstractPdfView

extends AbstractView

Abstract superclass for PDF views, using Bruno Lowagie's iText package. Application-specific view classes will extend this class. The view will be held in the subclass itself, not in a template.

See Expert One-On-One J2EE Design and Development by Rod Johnson, pp 571-575 for an example of use of this class.

Note: Internet Explorer requires a ".pdf" extension, as it doesn't always respect the declared content type.

Author:

Rod Johnson, Jean-Pierre Pawlak, Juergen Hoeller

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

Constructor Summary

AbstractPdfView()
This constructor sets the appropriate content type "application/pdf".

Method Summary

protected abstract void	buildPdfDocument(Map model, com.lowagie.text.Document document, com.lowagie.text.pdf.PdfWriter writer, HttpServletRequest request, HttpServletResponse response) Subclasses must implement this method to build an iText PDF document, given the model.
protected void	buildPdfMetadata(Map model, com.lowagie.text.Document document, HttpServletRequest request) Populate the iText Document's meta fields (author, title, etc.).
protected com.lowagie.text.Document	getDocument() Deprecated. in favor of newDocument
protected int	getViewerPreferences() Return the viewer preferences for the PDF file.
protected com.lowagie.text.Document	newDocument() Create a new document to hold the PDF contents.
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.AbstractView

addStaticAttribute, createRequestContext, getAttributesMap, getBeanName, getContentType, getRequestContextAttribute, getStaticAttributes, render, setAttributes, setAttributesCSV, setAttributesMap, setBeanName, setContentType, setRequestContextAttribute, toString

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, isContextRequired

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

AbstractPdfView

public AbstractPdfView()

This constructor sets the appropriate content type "application/pdf". Note that IE won't take much notice of this, but there's not a lot we can do about this. Generated documents should have a ".pdf" extension.

Method Detail

renderMergedOutputModel

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

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

getDocument

protected com.lowagie.text.Document getDocument()

Deprecated. in favor of newDocument

See Also:

newDocument()

newDocument

protected com.lowagie.text.Document newDocument()

Create a new document to hold the PDF contents.

By default returns an A4 document, but the subclass can specify any Document, possibly parameterized via bean properties defined on the View.

Returns:

the newly created iText Document

See Also:

Document.Document(com.lowagie.text.Rectangle)

getViewerPreferences

protected int getViewerPreferences()

Return the viewer preferences for the PDF file.

By default returns AllowPrinting and PageLayoutSinglePage, but can be subclassed. The subclass can either have fixed preferences or retrieve them from bean properties defined on the View.

Returns:

an int containing the bits information against PdfWriter definitions

See Also:

PdfWriter.AllowPrinting, PdfWriter.PageLayoutSinglePage

buildPdfMetadata

protected void buildPdfMetadata(Map model,
                                com.lowagie.text.Document document,
                                HttpServletRequest request)

Populate the iText Document's meta fields (author, title, etc.).
Default is an empty implementation. Subclasses may override this method to add meta fields such as title, subject, author, creator, keywords, etc. This method is called after assigning a PdfWriter to the Document and before calling document.open().

Parameters:

model - provides the model, in case meta information must be populated from it

document - the iText document being populated

request - in case we need locale etc. Shouldn't look at attributes.

See Also:

Document.addTitle(java.lang.String), Document.addSubject(java.lang.String), Document.addKeywords(java.lang.String), Document.addAuthor(java.lang.String), Document.addCreator(java.lang.String), Document.addProducer(), Document.addCreationDate(), Document.addHeader(java.lang.String, java.lang.String)

buildPdfDocument

protected abstract void buildPdfDocument(Map model,
                                         com.lowagie.text.Document document,
                                         com.lowagie.text.pdf.PdfWriter writer,
                                         HttpServletRequest request,
                                         HttpServletResponse response)
                                  throws Exception

Subclasses must implement this method to build an iText PDF document, given the model.

Parameters:

model - the model Map

document - the iText Document to use

writer - the PdfWriter to use

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