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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
import java.io.IOException;
import java.io.InputStream;
import java.io.FileInputStream;
import java.io.RandomAccessFile;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.util.Enumeration;
import java.util.zip.ZipFile;
import java.util.zip.ZipEntry;
public class XmlZipExtract
{
public static final String CONTENT = "Content.xml";
public static final String OLDCONTENT = "content.xml";
private static final int BUFFER_SIZE = 2048;
/**
* Full path of the Zip file to process.
*/
private String filename = null;
/**
* Constructor
*
* @param filename Full Path to Zip file to process
*
*/
public XmlZipExtract(String filename) {
this.filename = filename;
}
/**
* Copies Content.xml from zip file onto the filename passed as
* an argument
*
* @param fname Full Path to file to which contents have to be copied
*
*/
public void getContentXml(String fname) throws IOException
{
try
{
getContentXmlInt(fname, XmlZipExtract.CONTENT);
}
catch (NullPointerException e1)
{
// If the new name of the content file failed, try
// the older name.
//
System.out.println(filename + " Content.xml does not exist, trying content.xml...");
try
{
getContentXmlInt(fname, XmlZipExtract.OLDCONTENT);
}
catch (NullPointerException e2)
{
System.out.println(filename + " content.xml does not exist, trying content.xml...");
throw e2;
}
}
}
public void getContentXmlInt(String fname, String cname) throws IOException
{
byte b[] = getEntry(cname);
RandomAccessFile raf=null;
raf = new RandomAccessFile(fname, "rw");
raf.write(b);
raf.close();
}
/**
* Get the specified entry in the zip file as a stream.
*
* @param entryName The name of the entry in the zipfile to get.
* This should be one of the constants defined above.
*
* @return byte[] bits for entryName
*
* @throws IOException if something goes wrong
*/
public byte[] getEntry(String entryName) throws IOException
{
ZipFile zf = new ZipFile(filename);
ZipEntry ze = zf.getEntry(entryName);
byte[] bits = readStream(zf.getInputStream(ze));
zf.close();
return bits;
}
/**
* Read an InputStream into an array of bytes.
*
* @param is InputStream of data from Zip file
*
* @return an array of Bytes
*/
private byte[] readStream(InputStream is) throws IOException
{
BufferedInputStream bis = new BufferedInputStream(is);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[BUFFER_SIZE];
int eof = 0;
while ((eof = bis.read(buffer, 0, buffer.length)) > 0) {
baos.write(buffer, 0, eof);
}
return baos.toByteArray();
}
}
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