/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.sca.implementation.osgi.xml;
import java.lang.ref.WeakReference;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.tuscany.sca.assembly.ComponentType;
import org.apache.tuscany.sca.assembly.Property;
import org.apache.tuscany.sca.contribution.resolver.ClassReference;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
import org.apache.tuscany.sca.implementation.osgi.impl.OSGiImplementationImpl;
/**
* A default implementation of an artifact resolver, based on a map.
*
* @version $Rev: 683413 $ $Date: 2008-08-06 22:08:43 +0100 (Wed, 06 Aug 2008) $
*/
public class TestModelResolver implements ModelResolver {
private static final long serialVersionUID = -7826976465762296634L;
private Map<Object, Object> map = new HashMap<Object, Object>();
private WeakReference<ClassLoader> classLoader;
public TestModelResolver(ClassLoader classLoader) {
this.classLoader = new WeakReference<ClassLoader>(classLoader);
}
public <T> T resolveModel(Class<T> modelClass, T unresolved) {
Object resolved = map.get(unresolved);
if (resolved != null) {
if (unresolved instanceof OSGiImplementationImpl && !(resolved instanceof OSGiImplementationImpl)) {
OSGiImplementationImpl impl = ((OSGiImplementationImpl)unresolved);
ComponentType componentType = (ComponentType)resolved;
List<Property> properties = componentType.getProperties();
for (Property property : properties) {
impl.getProperties().add(property);
}
impl.setUnresolved(false);
return unresolved;
}
// Return the resolved object
return modelClass.cast(resolved);
} else if (unresolved instanceof ClassReference) {
// Load a class on demand
ClassReference classReference = (ClassReference)unresolved;
Class clazz;
try {
clazz = Class.forName(classReference.getClassName(), true, classLoader.get());
} catch (ClassNotFoundException e) {
// Return the unresolved object
return unresolved;
}
// Store a new ClassReference wrapping the loaded class
resolved = new ClassReference(clazz);
map.put(resolved, resolved);
// Return the resolved ClassReference
return modelClass.cast(resolved);
} else {
// Return the unresolved object
return unresolved;
}
}
public void addModel(Object resolved) {
map.put(resolved, resolved);
}
public Object removeModel(Object resolved) {
return map.remove(resolved);
}
}