/*
* 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.virtual.plugins.context.jar;
import java.io.ByteArrayInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.jboss.virtual.plugins.context.HierarchyVirtualFileHandler;
import org.jboss.virtual.plugins.context.StructuredVirtualFileHandler;
import org.jboss.virtual.spi.VFSContext;
import org.jboss.virtual.spi.VirtualFileHandler;
/**
* A nested jar contents implementation used to represent a jar within a jar.
*
* @author Ales.Justin@jboss.org
* @author Scott.Stark@jboss.org
*/
public class JarEntryContents extends AbstractJarHandler implements StructuredVirtualFileHandler, HierarchyVirtualFileHandler
{
/**
* serialVersionUID
*/
private static final long serialVersionUID = 1L;
private URL entryURL;
private byte[] contents;
private boolean isJar;
private NestedJarFromStream njar;
private InputStream openStream;
private List<VirtualFileHandler> entryChildren;
private transient Map<String, VirtualFileHandler> entryMap;
JarEntryContents(VFSContext context, VirtualFileHandler parent, ZipEntry entry, String entryName, URL jarURL, URL entryURL, byte[] contents)
throws IOException
{
super(context, parent, jarURL, null, entry, entryName);
try
{
setPathName(getChildPathName(entryName, false));
setVfsUrl(getChildVfsUrl(entryName, false));
}
catch (Exception e)
{
throw new RuntimeException(e);
}
this.entryURL = entryURL;
this.isJar = JarUtils.isArchive(getName());
this.contents = contents;
}
protected void initCacheLastModified()
{
}
/**
* Add a child to an entry
*
* @param child the child
*/
public synchronized void addChild(VirtualFileHandler child)
{
if (entryChildren == null)
entryChildren = new ArrayList<VirtualFileHandler>();
entryChildren.add(child);
if (entryMap != null)
entryMap.put(child.getName(), child);
}
/**
* TODO: removing the entry/jar that resulted in this needs
* to be detected.
*/
public boolean exists() throws IOException
{
return true;
}
public boolean isHidden() throws IOException
{
return false;
}
byte[] getContents()
{
return contents;
}
public List<VirtualFileHandler> getChildren(boolean ignoreErrors) throws IOException
{
List<VirtualFileHandler> children;
if (isJar)
{
initNestedJar();
children = njar.getChildren(ignoreErrors);
}
else
{
children = entryChildren;
}
if (children == null)
return Collections.emptyList();
else
return Collections.unmodifiableList(children);
}
public VirtualFileHandler createChildHandler(String name) throws IOException
{
return findChildHandler(name, true);
}
public VirtualFileHandler getChild(String path) throws IOException
{
if (path == null)
throw new IllegalArgumentException("Null path");
if ("".equals(path))
return this;
if (isJar)
{
initNestedJar();
return njar.getChild(path);
}
else if (getEntry().isDirectory())
{
return structuredFindChild(path);
}
return null;
}
/**
* Find the handler.
* TODO: synchronization on lazy entryMap creation
*
* @param name the path name
* @param allowNull do we allow nulls
* @return handler or <code>null</code> is it doesn't exist
* @throws IOException for any error
*/
protected synchronized VirtualFileHandler findChildHandler(String name, boolean allowNull) throws IOException
{
if (entryChildren == null)
{
if (allowNull)
return null;
throw new FileNotFoundException(this + " has no children");
}
if (entryMap == null)
{
entryMap = new HashMap<String, VirtualFileHandler>();
for (VirtualFileHandler child : entryChildren)
entryMap.put(child.getName(), child);
}
VirtualFileHandler child = entryMap.get(name);
if (child == null && allowNull == false)
throw new FileNotFoundException(this + " has no child: " + name);
return child;
}
// Convience attribute accessors
public long getLastModified()
{
return getEntry().getTime();
}
public long getSize()
{
return getEntry().getSize();
}
public boolean isLeaf()
{
return isJar == false && getEntry().isDirectory() == false;
}
// Stream accessor
public synchronized InputStream openStream() throws IOException
{
initNestedJar();
if (njar != null)
openStream = njar.openStream();
else
openStream = new ByteArrayInputStream(contents);
return openStream;
}
public synchronized void close()
{
if (openStream != null)
{
try
{
openStream.close();
}
catch (IOException e)
{
log.error("close error", e);
}
openStream = null;
}
}
public URI toURI() throws URISyntaxException
{
return entryURL.toURI();
}
public String toString()
{
StringBuffer tmp = new StringBuffer(super.toString());
tmp.append('[');
tmp.append("name=");
tmp.append(getName());
tmp.append(",size=");
tmp.append(getSize());
tmp.append(",time=");
tmp.append(getLastModified());
tmp.append(",URI=");
try
{
tmp.append(toURI());
}
catch (URISyntaxException ignored)
{
}
tmp.append(']');
return tmp.toString();
}
protected synchronized void initNestedJar() throws IOException
{
if (isJar && njar == null)
{
ByteArrayInputStream bais = new ByteArrayInputStream(contents);
ZipInputStream zis = new ZipInputStream(bais);
njar = new NestedJarFromStream(getVFSContext(), getParent(), zis, entryURL, null, getEntry(), getName());
}
}
}