/**
* This file is part of CloudML [ http://cloudml.org ]
*
* Copyright (C) 2012 - SINTEF ICT
* Contact: Franck Chauvel <franck.chauvel@sintef.no>
*
* Module: root
*
* CloudML is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* CloudML 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 CloudML. If not, see
* <http://www.gnu.org/licenses/>.
*/
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package org.cloudml.connectors.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
/**
*
* Change XML configurations inside a ZIP/JAR/WAR file.
*
* A sample use is as follows:
*
* ZipModifier modifier = new ZipModifier("C:\\temp\\granny-test.war","C:\\temp\\granny-out.war");
* Map<String, String> kv = new HashMap<String,String>();
*
* kv.put("//bean[@id=\"dataSource\"]/property[@name=\"url\"]/@value", "mysql://newurl");
* modifier.updateXMLAttribute("WEB-INF/classes/META-INF/spring/app-context.xml", kv);
*
* @author Hui Song
*/
public class ZipModifier {
File input = null;
File output = null;
public ZipModifier(String input, String output){
this.input = new File(input);
this.output = new File(output);
}
public void updateXMLElement(Map<String, Map<String,String>> entryKeyValues) throws IOException, ParserConfigurationException, SAXException, XPathExpressionException, TransformerConfigurationException, TransformerException{
ZipFile inZip = new ZipFile(input);
ZipOutputStream outZip = new ZipOutputStream(new FileOutputStream(output));
try{
Enumeration<? extends ZipEntry> entries = inZip.entries();
while(entries.hasMoreElements()){
ZipEntry en = entries.nextElement();
if(entryKeyValues.containsKey(en.getName())){
InputStream entryIS = inZip.getInputStream(en);
DocumentBuilder docBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = docBuilder.parse(entryIS);
XPath xpath = XPathFactory.newInstance().newXPath();
for(Map.Entry<String,String> kv : entryKeyValues.get(en.getName()).entrySet()){
XPathExpression xpe = xpath.compile(kv.getKey());
Node node = (Node) xpe.evaluate(doc,XPathConstants.NODE);
if(node instanceof Attr){
((Attr)node).setValue(kv.getValue());
}
else
throw new UnsupportedOperationException("Only support the change of attributes at this moment");
}
ZipEntry newen = new ZipEntry(en.getName());
outZip.putNextEntry(newen);
Transformer transformer = TransformerFactory.newInstance().newTransformer();
Result output = new StreamResult(outZip);
transformer.transform(new DOMSource(doc), output);
}
else{
outZip.putNextEntry(new ZipEntry(en.getName()));
copy(inZip.getInputStream(en),outZip);
}
outZip.closeEntry();
}
}
finally{
inZip.close();
outZip.close();
}
}
private static final byte[] BUFFER = new byte[4096 * 1024];
private void copy(InputStream input, OutputStream output) throws IOException {
int bytesRead;
while ((bytesRead = input.read(BUFFER))!= -1) {
output.write(BUFFER, 0, bytesRead);
}
}
}