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/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2006 - 2009 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.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;
private static final long serialVersionUID = -3568774359923270189L;
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)
{
if (dependentResource == null)
{
throw new NullPointerException();
}
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)
{
if (resourceKey == null)
{
throw new NullPointerException();
}
dependencies.put(resourceKey, new Long(version));
}
public long getVersion(final ResourceKey key)
{
if (key == null)
{
throw new NullPointerException();
}
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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