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Micro Distribution of the Payara Project for IBM JDK
/*
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* and Distribution License("CDDL") (collectively, the "License"). You
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* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package com.sun.enterprise.connectors.util;
import java.io.*;
import java.util.*;
import java.util.logging.Logger;
import java.util.zip.*;
import com.sun.logging.LogDomains;
import java.util.logging.Level;
/**
* JarResourceExtractor: JarResourceExtractor maps all resources included in a Zip or Jar file.
* Additionaly, it provides a method to extract one as a blob.
*
* @author Sivakumar Thyagarajan
*/
public final class JarResourceExtractor {
static Logger _logger = LogDomains.getLogger(JarResourceExtractor.class, LogDomains.RSR_LOGGER);
//resourceName as String Vs contents as byte[]
private Hashtable htJarContents = new Hashtable();
/**
* creates a JarResourceExtractor. It extracts all resources from a Jar into an
* internal hashtable, keyed by resource names.
*
* @param jarFileName
* a jar or zip file
*/
public JarResourceExtractor(String jarFileName) {
init(jarFileName);
}
/**
* Extracts a jar resource as a blob.
*
* @param name
* a resource name.
*/
public byte[] getResource(String name) {
if(_logger.isLoggable(Level.FINER)) {
_logger.finer("getResource: " + name);
}
return (byte[]) htJarContents.get(name);
}
/** initializes internal hash tables with Jar file resources. */
private void init(String jarFileName) {
ZipInputStream zis = null;
try {
//extract resources and put them into the hashtable.
FileInputStream fis = new FileInputStream(jarFileName);
BufferedInputStream bis = new BufferedInputStream(fis);
zis = new ZipInputStream(bis);
extractResources(zis);
} catch (Exception ex){
ex.printStackTrace();
}finally{
if(zis != null){
try{
zis.close();
}catch(Exception e){}
}
}
}
/**
* @throws FileNotFoundException
* @throws IOException
*/
private void extractResources(ZipInputStream zis) throws FileNotFoundException, IOException {
ZipEntry ze = null;
while ((ze = zis.getNextEntry()) != null) {
if(_logger.isLoggable(Level.FINER)) {
_logger.finer("ExtractResources : " + ze.getName());
}
extractZipEntryContents(ze, zis);
}
}
/**
* @param zis
* @throws IOException
*/
private void extractZipEntryContents(ZipEntry ze, ZipInputStream zis) throws IOException {
if (ze.isDirectory()) {
return;
}
if(_logger.isLoggable(Level.FINER)) {
_logger.finer("ze.getName()=" + ze.getName() + ","
+ "getSize()=" + ze.getSize());
}
byte[] b = getZipEntryContents(ze,zis);
//If it is a jar go RECURSIVE !!
if(ze.getName().trim().endsWith(".jar")){
if(_logger.isLoggable(Level.FINER)) {
_logger.finer("JAR - going into it !!");
}
BufferedInputStream bis = new BufferedInputStream( (new ByteArrayInputStream(b)));
extractResources(new ZipInputStream(bis));
} else {
//add to internal resource hashtable
htJarContents.put(ze.getName(), b );
if (ze.getName().trim().endsWith("class")){
if(_logger.isLoggable(Level.FINER)) {
_logger.finer("CLASS added " + ze.getName());
}
}
if(_logger.isLoggable(Level.FINER)) {
_logger.finer(ze.getName() + ",size="
+ b.length + ",csize=" + ze.getCompressedSize());
}
}
}
private byte[] getZipEntryContents(ZipEntry ze, ZipInputStream zis) throws IOException{
int size = (int) ze.getSize();
byte[] b = null;
// -1 means unknown size.
if (size != -1) {
//got a proper size, read 'size' bytes
b = new byte[(int) size];
int rb = 0;
int chunk = 0;
while (((int) size - rb) > 0) {
chunk = zis.read(b, rb, (int) size - rb);
if (chunk == -1) {
break;
}
rb += chunk;
}
} else {
//size of entry unknown .. keep on reading till we hit a -1
ArrayList al = new ArrayList();
int c = 0;
while( (c = zis.read()) != -1) {
al.add(Byte.valueOf((byte) c));
}
Byte[] btArr = (Byte[])al.toArray(new Byte[al.size()]);
b = new byte[btArr.length];
if(_logger.isLoggable(Level.FINER)) {
_logger.finer("ByteArray length" + btArr.length);
}
for (int i = 0; i < btArr.length; i++) {
b[i] = btArr[i].byteValue();
}
}
return b;
}
}
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