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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.zip;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceException;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceKeyCreationException;
import org.pentaho.reporting.libraries.resourceloader.ResourceKeyUtils;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoader;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.loader.LoaderUtils;
/**
* Creation-Date: 05.04.2006, 15:53:21
*
* @author Thomas Morgner
*/
public class ZipResourceLoader implements ResourceLoader
{
public static final String SCHEMA_NAME = ZipResourceLoader.class.getName();
private static final Log logger = LogFactory.getLog(ZipResourceLoader.class);
public ZipResourceLoader()
{
}
/**
* Checks, whether this resource loader implementation was responsible for
* creating this key.
*
* @param key
* @return
*/
public boolean isSupportedKey(final ResourceKey key)
{
return SCHEMA_NAME.equals(key.getSchema());
}
/**
* Creates a new resource key from the given object and the factory keys.
*
* @param value
* @param factoryKeys
* @return the created key.
* @throws org.pentaho.reporting.libraries.resourceloader.ResourceKeyCreationException
* if creating the key failed.
*/
public ResourceKey createKey(final Object value, final Map factoryKeys) throws ResourceKeyCreationException
{
if (value instanceof ZipEntryKey == false)
{
return null;
}
final ZipEntryKey entryKey = (ZipEntryKey) value;
final ResourceKey parentKey = entryKey.getZipFile().getKey();
return new ResourceKey(parentKey, SCHEMA_NAME, entryKey.getEntryName(), factoryKeys);
}
/**
* Derives a new resource key from the given key. If neither a path nor new
* factory-keys are given, the parent key is returned.
*
* @param parent the parent
* @param path the derived path (can be null).
* @param factoryKeys the optional factory keys (can be null).
* @return the derived key.
* @throws org.pentaho.reporting.libraries.resourceloader.ResourceKeyCreationException
* if the key cannot be derived for any reason.
*/
public ResourceKey deriveKey(final ResourceKey parent, final String path, final Map factoryKeys)
throws ResourceKeyCreationException
{
if (isSupportedKey(parent) == false)
{
throw new ResourceKeyCreationException("Assertation: Unsupported parent key type");
}
final String entry;
if (path != null)
{
entry = LoaderUtils.mergePaths((String) parent.getIdentifier(), path);
}
else
{
entry = (String) parent.getIdentifier();
}
final Map map;
if (factoryKeys != null)
{
map = new HashMap();
map.putAll(parent.getFactoryParameters());
map.putAll(factoryKeys);
}
else
{
map = parent.getFactoryParameters();
}
return new ResourceKey(parent.getParent(), parent.getSchema(), entry, map);
}
public URL toURL(final ResourceKey key)
{
return null;
}
public ResourceData load(final ResourceKey key) throws ResourceLoadingException
{
if (isSupportedKey(key) == false)
{
throw new ResourceLoadingException("Key format is not recognized.");
}
return new ZipResourceData(key);
}
public ResourceKey deserialize(final ResourceKey bundleKey, String stringKey) throws ResourceKeyCreationException
{
// For now, we are just going to have to pass on this one
throw new ResourceKeyCreationException("Can not deserialize a ZipResourceKey");
}
public String serialize(ResourceKey bundleKey, final ResourceKey key) throws ResourceException
{
if (isSupportedKey(key) == false)
{
throw new IllegalArgumentException("Not supported");
}
final ZipEntryKey entryKey = (ZipEntryKey) key.getIdentifier();
final String name = entryKey.getEntryName();
final ResourceKey zipKey = entryKey.getZipFile().getKey();
// For now, we are just going to have to pass on this one
throw new ResourceException("Can not serialize a ZipResourceKey");
}
public boolean isSupportedDeserializer(String data)
{
return SCHEMA_NAME.equals(ResourceKeyUtils.readSchemaFromString(data));
}
}
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