/**************************************************************************************
* Copyright (c) Jonas Bon�r, Alexandre Vasseur. All rights reserved. *
* http://aspectwerkz.codehaus.org *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the LGPL license *
* a copy of which has been included with this distribution in the license.txt file. *
**************************************************************************************/
package org.codehaus.aspectwerkz.transform.inlining.deployer;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import java.lang.ref.WeakReference;
import org.codehaus.aspectwerkz.util.UuidGenerator;
import org.codehaus.aspectwerkz.definition.AdviceDefinition;
import org.codehaus.aspectwerkz.definition.SystemDefinitionContainer;
import org.codehaus.aspectwerkz.definition.SystemDefinition;
import org.codehaus.aspectwerkz.definition.AspectDefinition;
import org.codehaus.aspectwerkz.expression.ExpressionInfo;
/**
* Universal Unique IDentifier (UUID) for a deployment event.
* <p/>
* Can be stored by the user to allow access to a specific deployment event.
* <p/>
* Visibility for all methods are package private, user should only use it as a handle.
*
* @author <a href="mailto:jboner@codehaus.org">Jonas Bon�r </a>
*/
public final class DeploymentHandle {
private final String UUID;
private final Map m_definitionChangeElements = new HashMap();
private final WeakReference m_loaderRef;
private final WeakReference m_classRef;
/**
* Creates a new handle.
*
* @param clazz the class of the entity being deployed
*/
DeploymentHandle(final Class clazz, final ClassLoader loader) {
if (clazz == null) {
throw new IllegalArgumentException("class can not be null");
}
if (loader == null) {
throw new IllegalArgumentException("loader can not be null");
}
UUID = UuidGenerator.generate(clazz);
m_loaderRef = new WeakReference(loader);
m_classRef = new WeakReference(clazz);
}
void registerDefinitionChange(final AdviceDefinition adviceDef, final ExpressionInfo oldExpression) {
m_definitionChangeElements.put(
adviceDef.getQualifiedName(),
new DefinitionChangeElement(adviceDef, oldExpression)
);
}
Class getAspectClass() {
return (Class) m_classRef.get();
}
Map getDefintionChangeElements() {
return m_definitionChangeElements;
}
void revertChanges() {
final ClassLoader loader = (ClassLoader) m_loaderRef.get();
// hotdeployment is done thru the virtual system, so reverts changes as well
SystemDefinition systemDef = SystemDefinitionContainer.getVirtualDefinitionAt(loader);
for (Iterator it2 = systemDef.getAspectDefinitions().iterator(); it2.hasNext();) {
AspectDefinition aspectDef = (AspectDefinition) it2.next();
for (Iterator it3 = aspectDef.getAfterAdviceDefinitions().iterator(); it3.hasNext();) {
AdviceDefinition adviceDef = (AdviceDefinition) it3.next();
DefinitionChangeElement changeElement =
(DefinitionChangeElement) m_definitionChangeElements.get(adviceDef.getQualifiedName());
if (changeElement != null) {
changeElement.getAdviceDef().setExpressionInfo(changeElement.getOldExpression());
}
}
}
}
public String toString() {
return new StringBuffer().append("DeploymentHandle [").
append(UUID.toString()).append(',').
append(((Class) m_classRef.get()).getName()).append(',').
append((ClassLoader) m_loaderRef.get()).append(']').toString();
}
public int hashCode() {
return UUID.hashCode();
}
public boolean equals(Object o) {
return ((DeploymentHandle) o).UUID.equals(UUID);
}
/**
* Holds the definition change of one advice.
*
* @author <a href="mailto:jboner@codehaus.org">Jonas Bon�r </a>
*/
static class DefinitionChangeElement {
private final AdviceDefinition m_adviceDef;
private final ExpressionInfo m_oldExpression;
public DefinitionChangeElement(final AdviceDefinition adviceDef, final ExpressionInfo oldExpression) {
m_adviceDef = adviceDef;
m_oldExpression = oldExpression;
}
public ExpressionInfo getOldExpression() {
return m_oldExpression;
}
public AdviceDefinition getAdviceDef() {
return m_adviceDef;
}
}
}