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Optimized the loading of ODF files (the old xmerge code is completely rewritten)

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git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@144 f0f2a975-2e09-46c8-9428-3b39399b9f3c
This commit is contained in:
henrikjust 2012-03-27 08:31:31 +00:00
parent e3a808f820
commit ecacd13bce
26 changed files with 1215 additions and 2603 deletions
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123
source/java/writer2latex/util/SimpleDOMBuilder.java Normal file
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/************************************************************************
*
* SimpleDOMBuilder.java
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Copyright: 2002-2012 by Henrik Just
*
* All Rights Reserved.
*
* Version 1.4 (2012-03-22)
*
*/
package writer2latex.util;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
/** This class provides a simple way to create and populate a DOM tree in logical order
*/
public class SimpleDOMBuilder {
private Document dom=null;
private Element currentElement=null;
/**
* Append an element to the current element and set this new element to be the current element.
* If there is no current element, a new DOM tree will be created (discarding the current DOM tree if any)
* with the new element as the document element.
*
* @param sTagName
* @return true on success
*/
public boolean startElement(String sTagName) {
if (currentElement!=null) {
currentElement = (Element) currentElement.appendChild(dom.createElement(sTagName));
}
else {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder builder = factory.newDocumentBuilder();
DOMImplementation domImpl = builder.getDOMImplementation();
DocumentType doctype = domImpl.createDocumentType(sTagName, "", "");
dom = domImpl.createDocument("",sTagName,doctype);
currentElement = dom.getDocumentElement();
} catch (ParserConfigurationException e) {
return false;
}
}
return true;
}
/**
* Set the current element to the parent of the current element
* @return true on success, false if there is no current element to end
*/
public boolean endElement() {
if (currentElement!=null) {
if (currentElement!=dom.getDocumentElement()) {
currentElement=(Element) currentElement.getParentNode();
}
else { // Back at document element: Finished populating the DOM tree
currentElement=null;
}
return true;
}
return false;
}
/**
* Set an attribute of the current element
* @param sName
* @param sValue
* @return true on success, false if there is no current element
*/
public boolean setAttribute(String sName,String sValue) {
if (currentElement!=null) {
currentElement.setAttribute(sName, sValue);
return true;
}
return false;
}
/**
* Add characters to the currentElement
* @param sText
* @return true on success, false if there is no current element
*/
public boolean characters(String sText) {
if (currentElement!=null) {
currentElement.appendChild(dom.createTextNode(sText));
return true;
}
return false;
}
/**
* Get the DOM tree
*
* @return the DOM tree, or null if none has been created
*/
public Document getDOM() {
return dom;
}
}

62
source/java/writer2latex/util/SimpleSAXHandler.java Normal file
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/************************************************************************
*
* SimpleSAXHandler.java
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Copyright: 2002-2012 by Henrik Just
*
* All Rights Reserved.
*
* Version 1.4 (2012-03-23)
*
*/
package writer2latex.util;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/** A simple SAX handler which transforms the SAX events into a DOM tree
* (supporting element and text nodes only)
*/
public class SimpleSAXHandler extends DefaultHandler {
private SimpleDOMBuilder builder = new SimpleDOMBuilder();
public org.w3c.dom.Document getDOM() {
return builder.getDOM();
}
@Override public void startElement(String nameSpace, String localName, String qName, Attributes attributes){
builder.startElement(qName);
int nLen = attributes.getLength();
for (int i=0;i<nLen;i++) {
builder.setAttribute(attributes.getQName(i), attributes.getValue(i));
}
}
@Override public void endElement(String nameSpace, String localName, String qName){
builder.endElement();
}
@Override public void characters(char[] characters, int nStart, int nEnd) throws SAXException {
builder.characters(new String(characters,nStart,nEnd));
}
}

84
source/java/writer2latex/util/SimpleZipReader.java Normal file
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/************************************************************************
*
* SimpleZipReader.java
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Copyright: 2002-2012 by Henrik Just
*
* All Rights Reserved.
*
* Version 1.4 (2012-03-27)
*
*/
package writer2latex.util;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class SimpleZipReader {
private final static int BUFFERSIZE = 1024;
private Map<String,byte[]> entries = new HashMap<String,byte[]>();
/** Read a zipped stream
*
* @param is <code>InputStream</code> to read
*
* @throws IOException if an I/O error occurs
*/
public void read(InputStream is) throws IOException {
ZipInputStream zis = new ZipInputStream(is);
ZipEntry entry = null;
while ((entry=zis.getNextEntry())!=null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int nLen = 0;
byte buffer[] = new byte[BUFFERSIZE];
while ((nLen = zis.read(buffer)) > 0) {
baos.write(buffer, 0, nLen);
}
byte bytes[] = baos.toByteArray();
entries.put(entry.getName(), bytes);
}
zis.close();
}
/** Get an entry from the ZIP file. Getting should be taken quite literally here:
* You can only get an entry once: The <code>SimpleZipReader</code> removes the entry from the
* collection when this method is called (memory optimization).
*
* @param name the name (path) of the ZIP entry
*
* @return a byte array with the contents of the entry, or null if the entry does not exist
*/
public byte[] getEntry(String sName) {
if (entries.containsKey(sName)) {
byte[] bytes = entries.get(sName);
entries.remove(sName);
return bytes;
}
return null;
}
}