Hi,
We have been using iText to generate PDF reports. We have a 1 page PDF
template(eg:Employee profile) which is populated at run time to generate
reports. We use this template and generate a PDF report which will have
multiple copies of this template(Profile report of multiple employees). PDF
template is section 508 compliant. Tags, Reading order is set.
Approach 1: Please see the code below. We can generate reports perfectly
fine but the report looses all it's accessibility tags.
APPROACH 2: Please see the code below. Report keeps the accessibility tags
but report has only 1 page i.e. Profile page of 1st record. While debugging,
I see that it is filling the fields on AcroForm but somehow report does not
contain those pages.
Can you help us figure out what we are doing wrong ?
Below is the code that we used:
/################## APPROACH 1 file starts ###################
/******************* MultiPdfView.java*******************
public class MultiPdfView extends PdfView {
protected int doPdf(HttpServletRequest request, Object pdfList,
PdfCopyFields writer) throws Exception {
if (pdfList == null) {
return 0;
}
List valueList = (List) pdfList;
int pdfLength = 0;
Object[] objList;
Object pdfObj;
for (Iterator it = valueList.iterator(); it.hasNext();) {
objList = (Object[]) it.next();
for (int i = 0; i < objList.length; i++) {
pdfObj = objList[i];
pdfLength += addPdfPage(request, pdfObj,
writer, this
.getPdfPages()[i], pdfLength);
}
}
return pdfLength;
}
}
*******************/
/******************PdfView *******************
public class PdfView extends AbstractView {
private PdfPageGenerator[] pdfPages;
private String fileName;
private String commandName;
protected void renderMergedOutputModel(Map model,
HttpServletRequest request, HttpServletResponse
response)
throws Exception {
WebUtils.exposeRequestAttributes(request, model);
Object pdfObj = model.get(this.commandName);
ServletOutputStream out = response.getOutputStream();
out.flush();
PdfCopyFields writer = new PdfCopyFields(out);
int pdfLength = doPdf(request, pdfObj, writer);
// write content type and also length (determined via
byte array)
response.setContentType("application/pdf");
response.setContentLength(pdfLength);
response.setHeader("Content-disposition", "filename="
+ this.fileName);
// flush byte array to servlet output stream
writer.getWriter().flush();
writer.close();
}
protected int addPdfPages(HttpServletRequest request, Object pdfObj,
PdfCopyFields writer) throws Exception {
int pdfLength = 0;
for (int i = 0; i < pdfPages.length; i++) {
pdfLength += addPdfPage(request, pdfObj, writer,
pdfPages[i],
pdfLength);
}
return pdfLength;
}
protected int addPdfPage(HttpServletRequest request, Object pdfObj,
PdfCopyFields writer, PdfPageGenerator pdfPage, int
fieldIndexer)
throws Exception {
int pdfLength;
String field;
ByteArrayOutputStream baos = pdfPage.getStream(request, pdfObj);
pdfLength = baos.toByteArray().length;
PdfReader reader = new PdfReader(baos.toByteArray());
// Rename the fields
AcroFields af = reader.getAcroFields();
// HashMap fields = (HashMap) af.getFields().clone();
// Iterator iter = fields.keySet().iterator();
// logger.debug(pdfPage.getTemplateFileName());
// while (iter.hasNext()) {
// field = (String) iter.next();
// logger.debug(field);
//
// // use <code>fieldIndexer</code> to ensure that all the
fields have
// // different names
// // it is the caller's responcibility to pass in the
indexer variable
// // with the correct inital value
// af.renameField(field, new
StringBuffer(field).append('_').append(
// ++fieldIndexer).toString());
// }
HashMap<String,AcroFields.Item> fieldsOriginal =
(HashMap<String,AcroFields.Item>)af.getFields();
HashMap<String,AcroFields.Item> fields =
(HashMap<String,AcroFields.Item>) fieldsOriginal.clone();
Iterator iter = fields.keySet( ).iterator( );
logger.debug(pdfPage.getTemplateFileName());
while ( iter.hasNext( ) ) {
field = ( String ) iter.next( );
logger.debug(field);
// use <code>fieldIndexer</code> to ensure that all the fields
have different names
// it is the caller's responcibility to pass in the indexer
variable with the correct inital value
af.renameField( field, new StringBuffer( field ).append( '_'
).append(++fieldIndexer).toString( ) );
}
writer.addDocument(reader);
return pdfLength;
}
protected int doPdf(HttpServletRequest request, Object pdfObj,
PdfCopyFields writer) throws Exception {
return addPdfPages(request, pdfObj, writer);
}
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public PdfPageGenerator[] getPdfPages() {
return pdfPages;
}
public void setPdfPages(PdfPageGenerator[] pdfPages) {
this.pdfPages = pdfPages;
}
public void setPdfPage(PdfPageGenerator pdfPage) {
setPdfPages(new PdfPageGenerator[] { pdfPage });
}
public String getCommandName() {
return commandName;
}
public void setCommandName(String commandName) {
this.commandName = commandName;
}
}
*******************/
/********************PdfPageGenerator****************
public abstract class PdfPageGenerator
{
protected final Log log = LogFactory.getLog(getClass());
private ApplicationContext applicationContext;
private PdfReader pdfReaderTemplate;
private String templateFileName;
public ByteArrayOutputStream getStream(HttpServletRequest request,
Object command) throws Exception
{
if(pdfReaderTemplate == null)
{
pdfReaderTemplate = new
PdfReader(request.getSession().getServletContext().getRealPath(this.templateFileName));
}
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PdfReader reader = new PdfReader(pdfReaderTemplate);
PdfStamper stamp = new PdfStamper(reader, baos);
AcroFields form = stamp.getAcroFields();
fillFields(request, form, command);
stamp.close();
return baos;
}
protected abstract void fillFields(HttpServletRequest request,
AcroFields form, Object command) throws Exception;
public void setApplicationContext(ApplicationContext context)
{
this.applicationContext = context;
}
public PdfReader getPdfReaderTemplate()
{
return pdfReaderTemplate;
}
public void setPdfReaderTemplate(PdfReader pdfReaderTemplate)
{
this.pdfReaderTemplate = pdfReaderTemplate;
}
public String getTemplateFileName()
{
return templateFileName;
}
public void setTemplateFileName(String templateFileName)
{
this.templateFileName = templateFileName;
}
}
*********************/
######################APPROACH 1 files end #####################/
/############APPROACH 2 starts########################
/*******************MultiPdfView ********************
public class MultiPdfView extends PdfView
{
protected int doPdf(HttpServletRequest request, Object pdfList,
ServletOutputStream out) throws Exception
{
if(pdfList == null)
{
return 0;
}
List valueList = (List) pdfList;
int pdfLength = 0;
Object[] objList;
Object pdfObj;
for (Iterator it = valueList.iterator(); it.hasNext(); ) {
objList = (Object[]) it.next();
for(int i=0; i<objList.length; i++)
{
pdfObj = objList[i];
pdfLength += addPdfPage(request, pdfObj, out,
this.getPdfPages()[i], pdfLength);
}
}
return pdfLength;
}
}
/*******************************
/**********************************PdfView
public class PdfView extends AbstractView
{
private PdfPageGenerator[] pdfPages;
private String fileName;
private String commandName;
protected void renderMergedOutputModel(Map model, HttpServletRequest
request, HttpServletResponse response) throws Exception
{
ServletOutputStream out = response.getOutputStream();
out.flush();
WebUtils.exposeRequestAttributes(request, model);
Object pdfObj = model.get(this.commandName);
//PdfCopyFields writer = new PdfCopyFields(out);
int pdfLength = doPdf(request, pdfObj, out);
// write content type and also length (determined via byte
array)
response.setContentType("application/pdf");
response.setContentLength(pdfLength);
response.setHeader("Content-disposition",
"filename="+this.fileName);
// flush byte array to servlet output stream
//writer.getWriter().flush();
//writer.close();
out.flush();
out.close();
}
protected int addPdfPages(HttpServletRequest request, Object pdfObj,
ServletOutputStream out) throws Exception
{
int pdfLength = 0;
for (int i=0; i<pdfPages.length; i++) {
pdfLength += addPdfPage(request, pdfObj, out, pdfPages[i],
pdfLength);
}
return pdfLength;
}
protected int addPdfPage(HttpServletRequest request, Object pdfObj,
ServletOutputStream out, PdfPageGenerator pdfPage,
int fieldIndexer) throws
Exception
{
int pdfLength;
String field;
ByteArrayOutputStream baos = pdfPage.getStream(request, pdfObj);
pdfLength = baos.toByteArray().length;
PdfReader reader = new PdfReader(baos.toByteArray());
// Rename the fields
AcroFields af = reader.getAcroFields( );
//HashMap fields = ( HashMap ) af.getFields( ).clone( );
HashMap<String,AcroFields.Item> fieldsOriginal =
(HashMap<String,AcroFields.Item>)af.getFields();
HashMap<String,AcroFields.Item> fields =
(HashMap<String,AcroFields.Item>) fieldsOriginal.clone();
Iterator iter = fields.keySet( ).iterator( );
logger.debug(pdfPage.getTemplateFileName());
while ( iter.hasNext( ) ) {
field = ( String ) iter.next( );
logger.debug(field);
// use <code>fieldIndexer</code> to ensure that all the fields
have different names
// it is the caller's responcibility to pass in the indexer
variable with the correct inital value
af.renameField( field, new StringBuffer( field ).append( '_'
).append(++fieldIndexer).toString( ) );
}
PdfStamper stamp = new PdfStamper(reader, out);
stamp.close();
out.flush();
//writer.addDocument(reader);
return pdfLength;
}
protected int doPdf(HttpServletRequest request, Object pdfObj,
ServletOutputStream out) throws Exception
{
return addPdfPages(request, pdfObj, out);
}
public String getFileName()
{
return fileName;
}
public void setFileName(String fileName)
{
this.fileName = fileName;
}
public PdfPageGenerator[] getPdfPages()
{
return pdfPages;
}
public void setPdfPages(PdfPageGenerator[] pdfPages)
{
this.pdfPages = pdfPages;
}
public void setPdfPage(PdfPageGenerator pdfPage)
{
setPdfPages(new PdfPageGenerator[] {pdfPage});
}
public String getCommandName()
{
return commandName;
}
public void setCommandName(String commandName)
{
this.commandName = commandName;
}
}
***********************************/
PdfPageGenerator.java is same as the first approach
Thanks,
abhi
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