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/**
* ================================================
* LibLoader : a free Java resource loading library
* ================================================
*
* Project Info: http://reporting.pentaho.org/libloader/
*
* (C) Copyright 2006, by Pentaho Corporation and Contributors.
*
* This library 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 library 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
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
*
* ------------
* $Id: DependencyCollector.java 2713 2007-04-01 13:43:18Z taqua $
* ------------
* (C) Copyright 2006, by Pentaho Corporation.
*/
package org.jfree.resourceloader;
import java.util.HashMap;
import java.io.Serializable;
/**
* Creation-Date: 08.04.2006, 14:12:14
*
* @author Thomas Morgner
*/
public class DependencyCollector implements Serializable, Cloneable
{
private HashMap dependencies;
public DependencyCollector(final ResourceKey source,
final long version)
{
if (source == null)
{
throw new NullPointerException();
}
dependencies = new HashMap();
dependencies.put(source, new Long(version));
}
public ResourceKey[] getDependencies()
{
return (ResourceKey[]) dependencies.keySet().toArray
(new ResourceKey[dependencies.size()]);
}
public void add(final Resource dependentResource)
{
final ResourceKey[] depKeys = dependentResource.getDependencies();
for (int i = 0; i < depKeys.length; i++)
{
final ResourceKey depKey = depKeys[i];
final long version = dependentResource.getVersion(depKey);
add(depKey, version);
}
}
public void add(final ResourceKey resourceKey, final long version)
{
dependencies.put(resourceKey, new Long(version));
}
public long getVersion(final ResourceKey key)
{
final Long l = (Long) dependencies.get(key);
if (l == null)
{
return -1;
}
return l.longValue();
}
public Object clone () throws CloneNotSupportedException
{
final DependencyCollector dc = (DependencyCollector) super.clone();
dc.dependencies = (HashMap) dependencies.clone();
return dc;
}
}
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