org.castor.mapping.MappingLoaderRegistry Maven / Gradle / Ivy
/*
* Copyright 2005 Ralf Joachim, Werner Guttmann
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package org.castor.mapping;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.castor.core.CoreProperties;
import org.castor.core.util.AbstractProperties;
import org.exolab.castor.mapping.MappingException;
import org.exolab.castor.mapping.MappingLoader;
/**
* @author Werner Guttmann
* @author Ralf Joachim
* @version $Revision: 5951 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
*/
public final class MappingLoaderRegistry {
/**
* The Jakarta Commons Logging instance
* used for all logging.
*/
private static final Log LOG = LogFactory.getLog(MappingLoaderRegistry.class);
/** The cached mapping loader factories. */
private final List _mappingLoaderFactories =
new ArrayList();
/** Already loaded mapping loaders. */
private final List _mappingLoaders = new ArrayList();
/**
* Creates an instance of this registry, loading the mapping loader factories from the
* castor.properties file.
*
* @param properties Properties.
*/
public MappingLoaderRegistry(final AbstractProperties properties) {
Object[] objects = properties.getObjectArray(CoreProperties.MAPPING_LOADER_FACTORIES,
getClass().getClassLoader());
for (Object mappingLoaderFactory : objects) {
_mappingLoaderFactories.add((MappingLoaderFactory) mappingLoaderFactory);
}
}
/**
* Deletes all 'cached' mapping loader factories.
*/
public void clear() {
for (MappingLoader mappingLoader : _mappingLoaders) {
mappingLoader.clear();
}
}
/**
* Returns a mapping loader for the suitable source and binding type. The engine's specific
* mapping loader is used to create binding specific descriptors. The mapping loader is cached in
* memory and returned in subsequent method calls.
*
* @param sourceType The type of the mapping source.
* @param bindingType The binding type to load from mapping.
* @return A mapping loader
* @throws MappingException A mapping error occurred preventing descriptors from being generated
* from the loaded mapping
*/
public MappingLoader getMappingLoader(final String sourceType, final BindingType bindingType)
throws MappingException {
for (MappingLoaderFactory mappingLoaderFactory : _mappingLoaderFactories) {
if (mappingLoaderFactory.getSourceType().equals(sourceType)
&& (mappingLoaderFactory.getBindingType() == bindingType)) {
MappingLoader mappingLoader = mappingLoaderFactory.getMappingLoader();
_mappingLoaders.add(mappingLoader);
return mappingLoader;
}
}
String msg = "No mapping loader/factory for: " + "SourceType=" + sourceType + " / BindingType="
+ bindingType;
LOG.error(msg);
throw new MappingException(msg);
}
/**
* Returns a list of 'cached' mapping loader factories.
*
* @return a list of 'cached' mapping loader factories.
*/
public Collection getMappingLoaderFactories() {
return Collections.unmodifiableCollection(_mappingLoaderFactories);
}
}