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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.contribution.resolver;
import java.lang.ref.WeakReference;
import org.apache.tuscany.sca.assembly.Base;
/**
* A weak reference to a class, which should be used to register classes
* with an ArtifactResolver and resolve these classes later.
*
* FIXME The core contribution model should not have dependencies on classes
* and ClassLoaders. This should move to the Java import support module.
*
* @version $Rev$ $Date$
*/
public class ClassReference implements Base {
private WeakReference<Class<?>> clazz;
private String className;
/**
* Constructs a new ClassReference.
*
* @param clazz The class reference
*/
public ClassReference(Class<?> clazz) {
this.clazz = new WeakReference<Class<?>>(clazz);
this.className = clazz.getName();
}
/**
* Constructs a new ClassReference.
*
* @param className The class name
*/
public ClassReference(String className) {
this.className = className;
}
/**
* Get the referenced class.
*
* @return The referenced class
*/
public Class<?> getJavaClass() {
if (clazz != null) {
return clazz.get();
} else {
return null;
}
}
/**
* Get the referenced class name.
*
* @return The class name
*/
public String getClassName() {
return className;
}
public boolean isUnresolved() {
return clazz == null;
}
public void setUnresolved(boolean unresolved) {
throw new IllegalStateException();
}
@Override
public int hashCode() {
return className.hashCode();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
} else {
if (obj instanceof ClassReference) {
return className.equals(((ClassReference)obj).className);
} else {
return false;
}
}
}
}
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