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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: AbstractResourceData.java 3325 2007-09-12 23:57:55Z tmorgner $
* ------------
* (C) Copyright 2006, by Pentaho Corporation.
*/
package org.jfree.resourceloader.loader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import org.jfree.io.IOUtils;
import org.jfree.resourceloader.ResourceData;
import org.jfree.resourceloader.ResourceLoadingException;
import org.jfree.resourceloader.ResourceManager;
/**
* Creation-Date: 05.04.2006, 15:24:47
*
* @author Thomas Morgner
*/
public abstract class AbstractResourceData implements ResourceData, Serializable
{
protected AbstractResourceData()
{
}
public byte[] getResource(final ResourceManager caller)
throws ResourceLoadingException
{
try
{
final InputStream in = getResourceAsStream(caller);
if (in == null)
{
throw new ResourceLoadingException("Unable to read Stream: No input stream: " + getKey());
}
try
{
final ByteArrayOutputStream bout = new ByteArrayOutputStream();
IOUtils.getInstance().copyStreams(in, bout);
return bout.toByteArray();
}
finally
{
in.close();
}
}
catch (ResourceLoadingException rle)
{
throw rle;
}
catch (IOException e)
{
throw new ResourceLoadingException("Unable to read Stream: ", e);
}
}
public int getResource(final ResourceManager caller,
final byte[] target,
final int offset,
final int length) throws ResourceLoadingException
{
try
{
if (target == null)
{
throw new NullPointerException();
}
if (target.length < (offset + length))
{
throw new IndexOutOfBoundsException();
}
final InputStream in = getResourceAsStream(caller);
if (in == null)
{
throw new ResourceLoadingException("Unable to read Stream: No input stream: " + getKey());
}
try
{
if (offset > 0)
{
long toBeSkipped = offset;
long skipResult = in.skip(toBeSkipped);
toBeSkipped -= skipResult;
while (skipResult > 0 && toBeSkipped > 0)
{
skipResult = in.skip(offset);
toBeSkipped -= skipResult;
}
if (toBeSkipped > 0)
{
// failed to read up to the offset ..
throw new ResourceLoadingException
("Unable to read Stream: Skipping content failed: " + getKey());
}
}
int bytesToRead = length;
// the input stream does not supply accurate available() data
// the zip entry does not know the size of the data
int bytesRead = in.read(target, length - bytesToRead, bytesToRead);
while (bytesRead > -1 && bytesToRead > 0)
{
bytesToRead -= bytesRead;
bytesRead = in.read(target, length - bytesToRead, bytesToRead);
}
return length - bytesRead;
}
finally
{
in.close();
}
}
catch (ResourceLoadingException rle)
{
throw rle;
}
catch (IOException e)
{
throw new ResourceLoadingException("Unable to read Stream: ", e);
}
}
}
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