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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.cache;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
/**
* Creation-Date: Feb 22, 2007, 7:36:19 PM
*
* @author Thomas Morgner
*/
public class CacheUtility
{
public static String externalizeKey(final ResourceKey key)
{
try
{
final ByteArrayOutputStream bout = new ByteArrayOutputStream();
final ObjectOutputStream oout = new ObjectOutputStream(bout);
oout.writeObject(key);
oout.close();
final byte[] serializedKeyData = bout.toByteArray();
return convertToString(serializedKeyData);
}
catch (IOException ioe)
{
return null;
}
}
private static String convertToString(final byte[] serializedKeyData)
{
final int capacity = (serializedKeyData.length / 2) + 2;
final StringBuffer buffer = new StringBuffer(capacity);
char data = 0;
if ((serializedKeyData.length & 1) == 1)
{
buffer.append('*');
}
else
{
buffer.append('#');
}
for (int i = 0; i < serializedKeyData.length; i += 1)
{
data <<= 8;
data |= serializedKeyData[i];
if ((i & 1) == 1)
{
buffer.append(data);
}
}
if ((serializedKeyData.length & 1) == 1)
{
data <<= 8;
buffer.append(data);
}
return buffer.toString();
}
private CacheUtility()
{
}
}
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