/*
* 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.deployers.vfs.spi.deployer.helpers;
import java.io.Externalizable;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.OutputStream;
import java.util.Map;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
import org.jboss.deployers.vfs.spi.deployer.ManifestMetaData;
/**
* Abstract manifest meta data.
*
* @author <a href="mailto:ales.justin@jboss.com">Ales Justin</a>
*/
public class AbstractManifestMetaData implements ManifestMetaData, Externalizable
{
private static final long serialVersionUID = 1L;
protected transient Manifest manifest;
public AbstractManifestMetaData()
{
}
public AbstractManifestMetaData(Manifest manifest)
{
if (manifest == null)
throw new IllegalArgumentException("Null manifest!");
this.manifest = manifest;
}
protected Manifest getManifest()
{
if (manifest == null)
throw new IllegalArgumentException("Null manifest!");
return manifest;
}
protected String get(Attributes attributes, String name)
{
return attributes != null ? attributes.getValue(name) : null;
}
public String getMainAttribute(String name)
{
return get(getManifest().getMainAttributes(), name);
}
public String getAttribute(String attributesName, String name)
{
return get(getManifest().getAttributes(attributesName), name);
}
public String getEntry(String entryName, String name)
{
Map<String,Attributes> entries = getManifest().getEntries();
if (entries != null)
{
return get(entries.get(entryName), name);
}
return null;
}
public void writeExternal(ObjectOutput out) throws IOException
{
OutputStream os = new OutputWrapper(out);
getManifest().write(os);
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
InputStream is = new InputWrapper(in);
manifest = new Manifest(is);
}
private class OutputWrapper extends OutputStream
{
private ObjectOutput out;
public OutputWrapper(ObjectOutput out)
{
this.out = out;
}
public void write(int b) throws IOException
{
out.write(b);
}
public void flush() throws IOException
{
out.flush();
}
public void close() throws IOException
{
out.close();
}
}
private class InputWrapper extends InputStream
{
private ObjectInput in;
public InputWrapper(ObjectInput in)
{
this.in = in;
}
public int read() throws IOException
{
return in.read();
}
public long skip(long n) throws IOException
{
return in.skip(n);
}
public int available() throws IOException
{
return in.available();
}
public void close() throws IOException
{
in.close();
}
}
}