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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.loader.raw;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
/**
* Creation-Date: 12.04.2006, 15:06:48
*
* @author Thomas Morgner
*/
public class RawResourceData implements ResourceData
{
private ResourceKey rawKey;
private byte[] data;
public RawResourceData(final ResourceKey rawKey)
{
if (rawKey == null)
{
throw new NullPointerException();
}
this.rawKey = rawKey;
this.data = (byte[]) rawKey.getIdentifier();
}
public byte[] getResource(final ResourceManager caller)
throws ResourceLoadingException
{
return (byte[]) data.clone();
}
public long getLength()
{
return data.length;
}
public InputStream getResourceAsStream(final ResourceManager caller)
throws ResourceLoadingException
{
return new ByteArrayInputStream(data);
}
/**
* Tries to read data into the given byte-array.
*
* @param caller
* @param target
* @param offset
* @param length
* @return the number of bytes read or -1 if no more data can be read.
* @throws org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException
*
*/
public int getResource(final ResourceManager caller,
final byte[] target,
final long offset,
final int length) throws ResourceLoadingException
{
if (offset > data.length)
{
return -1;
}
final int iOffset = (int) (0x7FFFFFFF & offset);
final int remaining = data.length - iOffset;
final int maxReadable = Math.min(target.length, Math.min (remaining, length));
System.arraycopy(data, iOffset, target, 0, maxReadable);
return maxReadable;
}
/**
* We do not support attributes.
*
* @param key
* @return
*/
public Object getAttribute(final String key)
{
return null;
}
public ResourceKey getKey()
{
return rawKey;
}
public long getVersion(final ResourceManager caller)
throws ResourceLoadingException
{
return -1;
}
}
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