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/**
*
* Copyright 2005 The Apache Software Foundation
*
* 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.apache.tuscany.core.loader.impl;
import org.apache.tuscany.core.config.ConfigurationLoadException;
import org.apache.tuscany.core.loader.StAXElementLoader;
import org.apache.tuscany.core.loader.StAXLoaderRegistry;
import org.apache.tuscany.core.loader.LoaderContext;
import org.apache.tuscany.model.assembly.AssemblyContext;
import org.apache.tuscany.model.assembly.AssemblyObject;
import org.osoa.sca.annotations.Scope;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import java.util.HashMap;
import java.util.Map;
/**
* @version $Rev$ $Date$
*/
@Scope("MODULE")
public class StAXLoaderRegistryImpl implements StAXLoaderRegistry {
private final Map<QName, StAXElementLoader<? extends AssemblyObject>> loaders = new HashMap<QName, StAXElementLoader<? extends AssemblyObject>>();
private Monitor monitor;
@org.apache.tuscany.core.system.annotation.Monitor
public void setMonitor(Monitor monitor) {
this.monitor = monitor;
}
public <T extends AssemblyObject> void registerLoader(QName element, StAXElementLoader<T> loader) {
monitor.registeringLoader(element);
loaders.put(element, loader);
}
public <T extends AssemblyObject> void unregisterLoader(QName element, StAXElementLoader<T> loader) {
monitor.unregisteringLoader(element);
loaders.remove(element);
}
public AssemblyObject load(XMLStreamReader reader, LoaderContext loaderContext) throws XMLStreamException, ConfigurationLoadException {
QName name = reader.getName();
monitor.elementLoad(name);
StAXElementLoader<? extends AssemblyObject> loader = loaders.get(name);
if (loader == null) {
ConfigurationLoadException e = new ConfigurationLoadException("Unrecognized element");
e.setIdentifier(name.toString());
throw e;
} else {
return loader.load(reader, loaderContext);
}
}
private final ThreadLocal<AssemblyContext> modelContext = new ThreadLocal<AssemblyContext>();
@Deprecated
public AssemblyContext getContext() {
return modelContext.get();
}
@Deprecated
public void setContext(AssemblyContext context) {
modelContext.set(context);
}
public static interface Monitor {
/**
* Event emitted when a StAX element loader is registered.
*
* @param xmlType the QName of the element the loader will handle
*/
void registeringLoader(QName xmlType);
/**
* Event emitted when a StAX element loader is unregistered.
*
* @param xmlType the QName of the element the loader will handle
*/
void unregisteringLoader(QName xmlType);
/**
* Event emitted when a request is made to load an element.
*
* @param xmlType the QName of the element that should be loaded
*/
void elementLoad(QName xmlType);
}
}
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