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/*
* 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.host.embedded.impl;
import java.lang.ref.WeakReference;
import java.util.HashMap;
import java.util.Map;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.contribution.resolver.ClassReference;
import org.apache.tuscany.sca.contribution.resolver.ModelResolver;
/**
* A test model resolver, based on a map.
*
* @version $Rev$ $Date$
*/
public class TestModelResolver implements ModelResolver {
private static final long serialVersionUID = -7826976465762296634L;
private Map<Object, Object> map = new HashMap<Object, Object>();
private WeakReference<ClassLoader> classLoader;
private Map<QName, Composite> composites = new HashMap<QName, Composite>();
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) {
// 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 wrappering 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);
if (resolved instanceof Composite) {
Composite composite = (Composite)resolved;
composites.put(composite.getName(), composite);
}
}
public Object removeModel(Object resolved) {
if (resolved instanceof Composite) {
Composite composite = (Composite)resolved;
composites.remove(composite.getName());
}
return map.remove(resolved);
}
public Composite getComposite(QName qname) {
return composites.get(qname);
}
}
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