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xylophone - LGPL Java library
/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.hwpf.converter;
import java.io.File;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.poi.hpsf.SummaryInformation;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.HWPFDocumentCore;
import org.apache.poi.hwpf.usermodel.Bookmark;
import org.apache.poi.hwpf.usermodel.CharacterRun;
import org.apache.poi.hwpf.usermodel.OfficeDrawing;
import org.apache.poi.hwpf.usermodel.Paragraph;
import org.apache.poi.hwpf.usermodel.Picture;
import org.apache.poi.hwpf.usermodel.Range;
import org.apache.poi.hwpf.usermodel.Section;
import org.apache.poi.hwpf.usermodel.Table;
import org.apache.poi.hwpf.usermodel.TableCell;
import org.apache.poi.hwpf.usermodel.TableRow;
import org.apache.poi.poifs.filesystem.DirectoryNode;
import org.apache.poi.poifs.filesystem.Entry;
import org.apache.poi.util.Beta;
import org.apache.poi.util.POILogFactory;
import org.apache.poi.util.POILogger;
import org.apache.poi.util.XMLHelper;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
@Beta
public class WordToTextConverter extends AbstractWordConverter
{
private static final POILogger logger = POILogFactory
.getLogger( WordToTextConverter.class );
public static String getText( DirectoryNode root ) throws Exception
{
final HWPFDocumentCore wordDocument = AbstractWordUtils.loadDoc( root );
return getText( wordDocument );
}
public static String getText( File docFile ) throws Exception
{
final HWPFDocumentCore wordDocument = AbstractWordUtils
.loadDoc( docFile );
return getText( wordDocument );
}
public static String getText( final HWPFDocumentCore wordDocument )
throws Exception
{
WordToTextConverter wordToTextConverter = new WordToTextConverter(
XMLHelper.getDocumentBuilderFactory().newDocumentBuilder().newDocument() );
wordToTextConverter.processDocument( wordDocument );
return wordToTextConverter.getText();
}
/**
* Java main() interface to interact with {@link WordToTextConverter}
*
*
* Usage: WordToTextConverter infile outfile
*
* Where infile is an input .doc file ( Word 95-2007) which will be rendered
* as plain text into outfile
*/
public static void main( String[] args ) throws Exception {
if ( args.length < 2 )
{
System.err.println( "Usage: WordToTextConverter " );
return;
}
System.out.println( "Converting " + args[0] );
System.out.println( "Saving output to " + args[1] );
Document doc = WordToTextConverter.process( new File( args[0] ) );
DOMSource domSource = new DOMSource( doc );
StreamResult streamResult = new StreamResult( new File( args[1] ) );
TransformerFactory tf = TransformerFactory.newInstance();
Transformer serializer = tf.newTransformer();
// TODO set encoding from a command argument
serializer.setOutputProperty( OutputKeys.ENCODING, "UTF-8" );
serializer.setOutputProperty( OutputKeys.INDENT, "no" );
serializer.setOutputProperty( OutputKeys.METHOD, "text" );
serializer.transform( domSource, streamResult );
}
static Document process( File docFile ) throws Exception
{
final HWPFDocumentCore wordDocument = AbstractWordUtils
.loadDoc( docFile );
WordToTextConverter wordToTextConverter = new WordToTextConverter(
XMLHelper.getDocumentBuilderFactory().newDocumentBuilder().newDocument() );
wordToTextConverter.processDocument( wordDocument );
return wordToTextConverter.getDocument();
}
private AtomicInteger noteCounters = new AtomicInteger( 1 );
private Element notes = null;
private boolean outputSummaryInformation = false;
private final TextDocumentFacade textDocumentFacade;
/**
* Creates new instance of {@link WordToTextConverter}. Can be used for
* output several {@link HWPFDocument}s into single text document.
*
* @throws ParserConfigurationException
* if an internal {@link DocumentBuilder} cannot be created
*/
public WordToTextConverter() throws ParserConfigurationException
{
this.textDocumentFacade = new TextDocumentFacade(
DocumentBuilderFactory.newInstance().newDocumentBuilder()
.newDocument() );
}
/**
* Creates new instance of {@link WordToTextConverter}. Can be used for
* output several {@link HWPFDocument}s into single text document.
*
* @param document
* XML DOM Document used as storage for text pieces
*/
public WordToTextConverter( Document document )
{
this.textDocumentFacade = new TextDocumentFacade( document );
}
public WordToTextConverter( TextDocumentFacade textDocumentFacade )
{
this.textDocumentFacade = textDocumentFacade;
}
@Override
protected void afterProcess()
{
if ( notes != null )
textDocumentFacade.getBody().appendChild( notes );
}
public Document getDocument()
{
return textDocumentFacade.getDocument();
}
public String getText() throws Exception
{
StringWriter stringWriter = new StringWriter();
DOMSource domSource = new DOMSource( getDocument() );
StreamResult streamResult = new StreamResult( stringWriter );
TransformerFactory tf = TransformerFactory.newInstance();
Transformer serializer = tf.newTransformer();
// TODO set encoding from a command argument
serializer.setOutputProperty( OutputKeys.ENCODING, "UTF-8" );
serializer.setOutputProperty( OutputKeys.INDENT, "no" );
serializer.setOutputProperty( OutputKeys.METHOD, "text" );
serializer.transform( domSource, streamResult );
return stringWriter.toString();
}
public boolean isOutputSummaryInformation()
{
return outputSummaryInformation;
}
@Override
protected void outputCharacters( Element block, CharacterRun characterRun,
String text )
{
block.appendChild( textDocumentFacade.createText( text ) );
}
@Override
protected void processBookmarks( HWPFDocumentCore wordDocument,
Element currentBlock, Range range, int currentTableLevel,
List rangeBookmarks )
{
processCharacters( wordDocument, currentTableLevel, range, currentBlock );
}
@Override
protected void processDocumentInformation(
SummaryInformation summaryInformation )
{
if ( isOutputSummaryInformation() )
{
if ( AbstractWordUtils.isNotEmpty( summaryInformation.getTitle() ) )
textDocumentFacade.setTitle( summaryInformation.getTitle() );
if ( AbstractWordUtils.isNotEmpty( summaryInformation.getAuthor() ) )
textDocumentFacade.addAuthor( summaryInformation.getAuthor() );
if ( AbstractWordUtils
.isNotEmpty( summaryInformation.getComments() ) )
textDocumentFacade.addDescription( summaryInformation
.getComments() );
if ( AbstractWordUtils
.isNotEmpty( summaryInformation.getKeywords() ) )
textDocumentFacade.addKeywords( summaryInformation
.getKeywords() );
}
}
@Override
public void processDocumentPart( HWPFDocumentCore wordDocument, Range range )
{
super.processDocumentPart( wordDocument, range );
afterProcess();
}
@Override
protected void processDrawnObject( HWPFDocument doc,
CharacterRun characterRun, OfficeDrawing officeDrawing,
String path, Element block )
{
// ignore
}
@Override
protected void processEndnoteAutonumbered( HWPFDocument wordDocument,
int noteIndex, Element block, Range endnoteTextRange )
{
processNote( wordDocument, block, endnoteTextRange );
}
@Override
protected void processFootnoteAutonumbered( HWPFDocument wordDocument,
int noteIndex, Element block, Range footnoteTextRange )
{
processNote( wordDocument, block, footnoteTextRange );
}
@Override
protected void processHyperlink( HWPFDocumentCore wordDocument,
Element currentBlock, Range textRange, int currentTableLevel,
String hyperlink )
{
processCharacters( wordDocument, currentTableLevel, textRange,
currentBlock );
currentBlock.appendChild( textDocumentFacade.createText( " ("
+ UNICODECHAR_ZERO_WIDTH_SPACE
+ hyperlink.replaceAll( "\\/", UNICODECHAR_ZERO_WIDTH_SPACE
+ "\\/" + UNICODECHAR_ZERO_WIDTH_SPACE )
+ UNICODECHAR_ZERO_WIDTH_SPACE + ")" ) );
}
@Override
protected void processImage( Element currentBlock, boolean inlined,
Picture picture )
{
// ignore
}
@Override
protected void processImage( Element currentBlock, boolean inlined,
Picture picture, String url )
{
// ignore
}
@Override
protected void processImageWithoutPicturesManager( Element currentBlock,
boolean inlined, Picture picture )
{
// ignore
}
@Override
protected void processLineBreak( Element block, CharacterRun characterRun )
{
block.appendChild( textDocumentFacade.createText( "\n" ) );
}
protected void processNote( HWPFDocument wordDocument, Element block,
Range noteTextRange )
{
final int noteIndex = noteCounters.getAndIncrement();
block.appendChild( textDocumentFacade
.createText( UNICODECHAR_ZERO_WIDTH_SPACE + "[" + noteIndex
+ "]" + UNICODECHAR_ZERO_WIDTH_SPACE ) );
if ( notes == null )
notes = textDocumentFacade.createBlock();
Element note = textDocumentFacade.createBlock();
notes.appendChild( note );
note.appendChild( textDocumentFacade.createText( "^" + noteIndex
+ "\t " ) );
processCharacters( wordDocument, Integer.MIN_VALUE, noteTextRange, note );
note.appendChild( textDocumentFacade.createText( "\n" ) );
}
@Override
protected boolean processOle2( HWPFDocument wordDocument, Element block,
Entry entry ) throws Exception
{
if ( !( entry instanceof DirectoryNode ) )
return false;
DirectoryNode directoryNode = (DirectoryNode) entry;
/*
* even if there is no ExtractorFactory in classpath, still support
* included Word's objects
*/
if ( directoryNode.hasEntry( "WordDocument" ) )
{
String text = WordToTextConverter.getText( (DirectoryNode) entry );
block.appendChild( textDocumentFacade
.createText( UNICODECHAR_ZERO_WIDTH_SPACE + text
+ UNICODECHAR_ZERO_WIDTH_SPACE ) );
return true;
}
Object extractor;
try
{
Class cls = Class
.forName( "org.apache.poi.extractor.ExtractorFactory" );
Method createExtractor = cls.getMethod( "createExtractor",
DirectoryNode.class );
extractor = createExtractor.invoke( null, directoryNode );
}
catch ( Exception exc )
{
// no extractor in classpath
logger.log( POILogger.WARN, "There is an OLE object entry '",
entry.getName(),
"', but there is no text extractor for this object type ",
"or text extractor factory is not available: ", "" + exc );
return false;
}
try
{
Method getText = extractor.getClass().getMethod( "getText" );
String text = (String) getText.invoke( extractor );
block.appendChild( textDocumentFacade
.createText( UNICODECHAR_ZERO_WIDTH_SPACE + text
+ UNICODECHAR_ZERO_WIDTH_SPACE ) );
return true;
}
catch ( Exception exc )
{
logger.log( POILogger.ERROR,
"Unable to extract text from OLE entry '", entry.getName(),
"': ", exc, exc );
return false;
}
}
@Override
protected void processPageBreak( HWPFDocumentCore wordDocument, Element flow )
{
Element block = textDocumentFacade.createBlock();
block.appendChild( textDocumentFacade.createText( "\n" ) );
flow.appendChild( block );
}
@Override
protected void processPageref( HWPFDocumentCore wordDocument,
Element currentBlock, Range textRange, int currentTableLevel,
String pageref )
{
processCharacters( wordDocument, currentTableLevel, textRange,
currentBlock );
}
@Override
protected void processParagraph( HWPFDocumentCore wordDocument,
Element parentElement, int currentTableLevel, Paragraph paragraph,
String bulletText )
{
Element pElement = textDocumentFacade.createParagraph();
pElement.appendChild( textDocumentFacade.createText( bulletText ) );
processCharacters( wordDocument, currentTableLevel, paragraph, pElement );
pElement.appendChild( textDocumentFacade.createText( "\n" ) );
parentElement.appendChild( pElement );
}
@Override
protected void processSection( HWPFDocumentCore wordDocument,
Section section, int s )
{
Element sectionElement = textDocumentFacade.createBlock();
processParagraphes( wordDocument, sectionElement, section,
Integer.MIN_VALUE );
sectionElement.appendChild( textDocumentFacade.createText( "\n" ) );
textDocumentFacade.body.appendChild( sectionElement );
}
protected void processTable( HWPFDocumentCore wordDocument, Element flow,
Table table )
{
final int tableRows = table.numRows();
for ( int r = 0; r < tableRows; r++ )
{
TableRow tableRow = table.getRow( r );
Element tableRowElement = textDocumentFacade.createTableRow();
final int rowCells = tableRow.numCells();
for ( int c = 0; c < rowCells; c++ )
{
TableCell tableCell = tableRow.getCell( c );
Element tableCellElement = textDocumentFacade.createTableCell();
if ( c != 0 )
tableCellElement.appendChild( textDocumentFacade
.createText( "\t" ) );
processCharacters( wordDocument, table.getTableLevel(),
tableCell, tableCellElement );
tableRowElement.appendChild( tableCellElement );
}
tableRowElement.appendChild( textDocumentFacade.createText( "\n" ) );
flow.appendChild( tableRowElement );
}
}
public void setOutputSummaryInformation( boolean outputDocumentInformation )
{
this.outputSummaryInformation = outputDocumentInformation;
}
}