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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.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.ResourceKeyData;
import org.pentaho.reporting.libraries.resourceloader.ResourceKeyUtils;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoader;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
/**
* Creation-Date: 12.04.2006, 15:19:03
*
* @author Thomas Morgner
*/
public class RawResourceLoader implements ResourceLoader
{
public static final String SCHEMA_NAME = RawResourceLoader.class.getName();
public RawResourceLoader()
{
}
/**
* Checks, whether this resource loader implementation was responsible for
* creating this key.
*
* @param key
* @return
*/
public boolean isSupportedKey(final ResourceKey key)
{
if (SCHEMA_NAME.equals(key.getSchema()))
{
return true;
}
return false;
}
/**
* 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 byte[] == false)
{
return null;
}
return new ResourceKey(SCHEMA_NAME, value, 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 (path != null)
{
throw new ResourceKeyCreationException("Unable to derive key for new path.");
}
if (isSupportedKey(parent) == false)
{
throw new ResourceKeyCreationException("Assertation: Unsupported parent key type");
}
if (factoryKeys == null)
{
return parent;
}
final HashMap map = new HashMap();
map.putAll(parent.getFactoryParameters());
map.putAll(factoryKeys);
return new ResourceKey(parent.getSchema(), parent.getIdentifier(), map);
}
public URL toURL(final ResourceKey key)
{
// not supported ..
return null;
}
public ResourceData load(final ResourceKey key) throws ResourceLoadingException
{
if (isSupportedKey(key) == false)
{
throw new ResourceLoadingException("The key type is not supported.");
}
return new RawResourceData(key);
}
/**
* Creates a String version of the resource key that can be used to generate a new ResourceKey
* object via deserialization
* @param bundleKey
* @param key
*/
public String serialize(final ResourceKey bundleKey, final ResourceKey key) throws ResourceException
{
// Validate the parameter
if (key == null)
{
throw new NullPointerException("The ResourceKey can not be null");
}
if (isSupportedKey(key) == false)
{
throw new IllegalArgumentException("Key format is not recognized.");
}
if (!(key.getIdentifier() instanceof byte[]))
{
throw new IllegalArgumentException("ResourceKey is invalid - identifier is not a byte[] object");
}
final byte[] data = (byte[]) key.getIdentifier();
final char[] cdata = new char[data.length];
for (int i = 0; i < data.length; i++)
{
cdata[i] = (char) (data[i] & 0xFF);
}
return ResourceKeyUtils.createStringResourceKey
(String.valueOf(key.getSchema()), new String(cdata), key.getFactoryParameters());
}
/**
* Parses the input string and returns a newly created ResourceKey based on the string data
*/
public ResourceKey deserialize(final ResourceKey bundleKey, String stringKey) throws ResourceKeyCreationException
{
// Parse the data
final ResourceKeyData keyData = ResourceKeyUtils.parse(stringKey);
// Validate the data
if (SCHEMA_NAME.equals(keyData.getSchema()) == false)
{
throw new ResourceKeyCreationException("Serialized version of key does not contain correct schema");
}
final String identifier = keyData.getIdentifier();
final char[] chars = identifier.toCharArray();
final byte[] data = new byte[chars.length];
for (int i = 0; i < chars.length; i++)
{
data[i] = (byte) chars[i];
}
return createKey(data, keyData.getFactoryParameters());
}
public boolean isSupportedDeserializer(String data)
{
return SCHEMA_NAME.equals(ResourceKeyUtils.readSchemaFromString(data));
}
}
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