/*
* JBoss, Home of Professional Open Source
* Copyright 2006, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.test.deployers.vfs.deployer.facelets.support;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLDecoder;
import java.util.Enumeration;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
/**
* Mock of Facelets's Classpath class.
*
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
@SuppressWarnings("unchecked")
public final class Classpath
{
public static URL[] search(ClassLoader cl, String prefix, String suffix) throws IOException
{
Enumeration[] e = new Enumeration[]{
cl.getResources(prefix),
cl.getResources(prefix + "MANIFEST.MF")
};
Set all = new LinkedHashSet();
URL url;
URLConnection conn;
JarFile jarFile;
for (int i = 0, s = e.length; i < s; ++i)
{
while (e[i].hasMoreElements())
{
url = (URL)e[i].nextElement();
conn = url.openConnection();
conn.setUseCaches(false);
conn.setDefaultUseCaches(false);
if (conn instanceof JarURLConnection)
{
jarFile = ((JarURLConnection)conn).getJarFile();
}
else
{
jarFile = getAlternativeJarFile(url);
}
if (jarFile != null)
{
searchJar(cl, all, jarFile, prefix, suffix);
}
else
{
boolean searchDone = searchDir(all, new File(URLDecoder.decode(url.getFile(), "UTF-8")), suffix);
if (searchDone == false)
{
searchFromURL(all, prefix, suffix, url);
}
}
}
}
return (URL[])all.toArray(new URL[all.size()]);
}
private static boolean searchDir(Set result, File file, String suffix) throws IOException
{
if (file.exists() && file.isDirectory())
{
File[] fc = file.listFiles();
String path;
for (int i = 0; i < fc.length; i++)
{
path = fc[i].getAbsolutePath();
if (fc[i].isDirectory())
{
searchDir(result, fc[i], suffix);
}
else if (path.endsWith(suffix))
{
result.add(fc[i].toURL());
}
}
return true;
}
return false;
}
/**
* Search from URL.
* Fall back on prefix tokens if
* not able to read from original url param.
*
* @param result the result urls
* @param prefix the current prefix
* @param suffix the suffix to match
* @param url the current url to start search
* @throws IOException for any error
*/
private static void searchFromURL(Set result, String prefix, String suffix, URL url) throws IOException
{
boolean done = false;
InputStream is = getInputStream(url);
if (is != null)
{
try
{
ZipInputStream zis;
if (is instanceof ZipInputStream)
zis = (ZipInputStream)is;
else
zis = new ZipInputStream(is);
try
{
ZipEntry entry = zis.getNextEntry();
// initial entry should not be null
// if we assume this is some inner jar
done = (entry != null);
while (entry != null)
{
String entryName = entry.getName();
if (entryName.endsWith(suffix))
{
String urlString = url.toExternalForm();
result.add(new URL(urlString + entryName));
}
entry = zis.getNextEntry();
}
}
finally
{
zis.close();
}
}
catch (Exception ignore)
{
}
}
if (done == false && prefix.length() > 0)
{
// we add '/' at the end since join adds it as well
String urlString = url.toExternalForm() + "/";
String[] split = prefix.split("/");
prefix = join(split, true);
String end = join(split, false);
int p = urlString.lastIndexOf(end);
url = new URL(urlString.substring(0, p));
searchFromURL(result, prefix, suffix, url);
}
}
/**
* Join tokens, exlude last if param equals true.
*
* @param tokens the tokens
* @param excludeLast do we exclude last token
* @return joined tokens
*/
private static String join(String[] tokens, boolean excludeLast)
{
StringBuffer join = new StringBuffer();
for (int i = 0; i < tokens.length - (excludeLast ? 1 : 0); i++)
join.append(tokens[i]).append("/");
return join.toString();
}
/**
* Open input stream from url.
* Ignore any errors.
*
* @param url the url to open
* @return input stream or null if not possible
*/
private static InputStream getInputStream(URL url)
{
try
{
return url.openStream();
}
catch (Throwable t)
{
return null;
}
}
/**
* For URLs to JARs that do not use JarURLConnection - allowed by
* the servlet spec - attempt to produce a JarFile object all the same.
* Known servlet engines that function like this include Weblogic
* and OC4J.
* This is not a full solution, since an unpacked WAR or EAR will not
* have JAR "files" as such.
*/
private static JarFile getAlternativeJarFile(URL url) throws IOException
{
String urlFile = url.getFile();
// Trim off any suffix - which is prefixed by "!/" on Weblogic
int separatorIndex = urlFile.indexOf("!/");
// OK, didn't find that. Try the less safe "!", used on OC4J
if (separatorIndex == -1)
{
separatorIndex = urlFile.indexOf('!');
}
if (separatorIndex != -1)
{
String jarFileUrl = urlFile.substring(0, separatorIndex);
// And trim off any "file:" prefix.
if (jarFileUrl.startsWith("file:"))
{
jarFileUrl = jarFileUrl.substring("file:".length());
}
return new JarFile(jarFileUrl);
}
return null;
}
private static void searchJar(ClassLoader cl, Set result, JarFile file,
String prefix, String suffix) throws IOException
{
Enumeration e = file.entries();
JarEntry entry;
String name;
while (e.hasMoreElements())
{
try
{
entry = (JarEntry)e.nextElement();
}
catch (Throwable t)
{
continue;
}
name = entry.getName();
if (name.startsWith(prefix) && name.endsWith(suffix))
{
Enumeration e2 = cl.getResources(name);
while (e2.hasMoreElements())
{
result.add(e2.nextElement());
}
}
}
}
}