/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.aop;
import org.jboss.aop.advice.AdviceStack;
import org.jboss.aop.advice.AspectDefinition;
import org.jboss.aop.advice.Interceptor;
import org.jboss.aop.advice.InterceptorFactory;
import org.jboss.aop.joinpoint.Joinpoint;
import org.jboss.aop.metadata.SimpleMetaData;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Arrays;
/**
* Holds an object instance's metadata and attached interceptors
*
* @author <a href="mailto:bill@jboss.org">Bill Burke</a>
* @version $Revision: 70817 $
*/
public class ClassInstanceAdvisor implements InstanceAdvisor, java.io.Serializable
{
static final long serialVersionUID = -3057976129116723527L;
protected ArrayList<Interceptor> insertedInterceptors = null;
protected ArrayList<Interceptor> appendedInterceptors = null;
protected WeakReference<Object> instanceRef;
protected transient WeakReference<Advisor> classAdvisorRef;
public boolean hasInstanceAspects = false;
/**
* aspects is a weak hash map of AspectDefinitions so that perinstance advices can be undeployed/redeployed
*/
private InterceptorChainObserver interceptorChainObserver;
InstanceAdvisorDelegate delegate;
public ClassInstanceAdvisor()
{
delegate = new InstanceAdvisorDelegate(null, this);
delegate.initialize();
}
public ClassInstanceAdvisor(Object obj)
{
this.instanceRef = new WeakReference<Object>(obj);
if (obj instanceof Advised)
{
Advised advised = (Advised) obj;
Advisor advizor = advised._getAdvisor();
setAdvisorAndInitialise(advizor);
}
}
public ClassInstanceAdvisor(Advisor advizor)
{
setAdvisorAndInitialise(advizor);
}
private void setAdvisorAndInitialise(Advisor advizor)
{
this.classAdvisorRef = new WeakReference<Advisor>(advizor);
if (advizor instanceof ClassAdvisor)
{
delegate = new InstanceAdvisorDelegate(advizor, this);
delegate.initialize();
this.interceptorChainObserver = ((ClassAdvisor) advizor).getInterceptorChainObserver();
}
}
public boolean hasInterceptors()
{
return appendedInterceptors != null || insertedInterceptors != null;
}
public Object getPerInstanceAspect(String def)
{
return delegate.getPerInstanceAspect(def);
}
public Object getPerInstanceAspect(AspectDefinition def)
{
return delegate.getPerInstanceAspect(def);
}
public Object getPerInstanceJoinpointAspect(Joinpoint joinpoint, AspectDefinition def)
{
return delegate.getPerInstanceJoinpointAspect(joinpoint, def);
}
public SimpleMetaData getMetaData()
{
return delegate.getMetaData();
}
public Interceptor[] getInterceptors()
{
ArrayList<Interceptor> newlist = new ArrayList<Interceptor>();
if (insertedInterceptors != null) newlist.addAll(insertedInterceptors);
if (appendedInterceptors != null) newlist.addAll(appendedInterceptors);
return newlist.toArray(new Interceptor[newlist.size()]);
}
/**
* Called by the advisor
*/
public Interceptor[] getInterceptors(Interceptor[] advisorChain)
{
if (insertedInterceptors == null && appendedInterceptors == null) return advisorChain;
ArrayList<Interceptor> newlist = new ArrayList<Interceptor>();
if (insertedInterceptors != null) newlist.addAll(insertedInterceptors);
if (advisorChain != null)
{
newlist.addAll(Arrays.asList(advisorChain));
}
if (appendedInterceptors != null) newlist.addAll(appendedInterceptors);
return newlist.toArray(new Interceptor[newlist.size()]);
}
public void insertInterceptor(int index, Interceptor interceptor)
{
ArrayList<Interceptor> newList = new ArrayList<Interceptor>();
if (insertedInterceptors != null)
{
newList.addAll(insertedInterceptors);
}
newList.add(index, interceptor);
insertedInterceptors = newList;
hasInstanceAspects = true;
if (interceptorChainObserver != null)
{
interceptorChainObserver.instanceInterceptorAdded(this);
}
}
public void insertInterceptor(Interceptor interceptor)
{
ArrayList<Interceptor> newList = new ArrayList<Interceptor>();
if (insertedInterceptors != null)
{
newList.addAll(insertedInterceptors);
}
newList.add(interceptor);
insertedInterceptors = newList;
hasInstanceAspects = true;
if (interceptorChainObserver != null)
{
interceptorChainObserver.instanceInterceptorAdded(this);
}
}
public void appendInterceptor(Interceptor interceptor)
{
ArrayList<Interceptor> newList = new ArrayList<Interceptor>();
if (appendedInterceptors != null)
{
newList.addAll(appendedInterceptors);
}
newList.add(interceptor);
appendedInterceptors = newList;
hasInstanceAspects = true;
if (interceptorChainObserver != null)
{
interceptorChainObserver.instanceInterceptorAdded(this);
}
}
public void appendInterceptor(int index, Interceptor interceptor)
{
ArrayList<Interceptor> newList = new ArrayList<Interceptor>();
if (appendedInterceptors != null)
{
newList.addAll(appendedInterceptors);
}
newList.add(index, interceptor);
appendedInterceptors = newList;
hasInstanceAspects = true;
if (interceptorChainObserver != null)
{
interceptorChainObserver.instanceInterceptorAdded(this);
}
}
/**
* This will not remove interceptor pointcuts! You will have to do this through AspectManager
*/
public void removeInterceptor(String name)
{
int interceptorsRemoved = internalRemoveInterceptor(name);
if (interceptorChainObserver != null)
{
interceptorChainObserver.instanceInterceptorsRemoved(this, interceptorsRemoved);
}
}
/**
* @param name
* @return
*/
private int internalRemoveInterceptor(String name)
{
int interceptorsRemoved = 0;
if (insertedInterceptors != null)
{
for (int i = 0; i < insertedInterceptors.size(); i++)
{
Interceptor interceptor = insertedInterceptors.get(i);
if (interceptor.getName().equals(name))
{
ArrayList<Interceptor> newList = new ArrayList<Interceptor>();
newList.addAll(insertedInterceptors);
newList.remove(i);
insertedInterceptors = newList;
interceptorsRemoved ++;
}
}
}
if (appendedInterceptors != null)
{
for (int i = 0; i < appendedInterceptors.size(); i++)
{
Interceptor interceptor = appendedInterceptors.get(i);
if (interceptor.getName().equals(name))
{
ArrayList<Interceptor> newList = new ArrayList<Interceptor>();
newList.addAll(appendedInterceptors);
newList.remove(i);
appendedInterceptors = newList;
interceptorsRemoved ++;
}
}
}
hasInstanceAspects = ((insertedInterceptors != null && insertedInterceptors.size() > 0)
|| (appendedInterceptors != null && appendedInterceptors.size() > 0));
return interceptorsRemoved;
}
public final boolean hasAspects()
{
return hasInstanceAspects;
}
public void insertInterceptorStack(String stackName)
{
AdviceStack stack = AspectManager.instance().getAdviceStack(stackName);
if (stack == null) throw new RuntimeException("Stack " + stackName + " not found.");
ClassAdvisor classAdvisor = null;
if (getInstance() instanceof Advised)
{
Advised advised = (Advised) getInstance();
classAdvisor = ((ClassAdvisor) advised._getAdvisor());
}
int interceptorsAdded = 0;
for (InterceptorFactory factory : stack.getInterceptorFactories())
{
if (!factory.isDeployed()) continue;
Interceptor interceptor = factory.create(classAdvisor, null);
insertInterceptor(interceptor);
interceptorsAdded ++;
}
if (interceptorChainObserver != null)
{
this.interceptorChainObserver.instanceInterceptorsAdded(this, interceptorsAdded);
}
}
public void appendInterceptorStack(String stackName)
{
AdviceStack stack = AspectManager.instance().getAdviceStack(stackName);
if (stack == null) throw new RuntimeException("Stack " + stackName + " not found.");
ClassAdvisor classAdvisor = null;
if (getInstance() instanceof Advised)
{
Advised advised = (Advised) getInstance();
classAdvisor = ((ClassAdvisor) advised._getAdvisor());
}
int interceptorsAdded = 0;
for (InterceptorFactory factory : stack.getInterceptorFactories())
{
if (!factory.isDeployed()) continue;
Interceptor interceptor = factory.create(classAdvisor, null);
appendInterceptor(interceptor);
interceptorsAdded ++;
}
if (interceptorChainObserver != null)
{
this.interceptorChainObserver.instanceInterceptorsAdded(this, interceptorsAdded);
}
}
public void removeInterceptorStack(String stackName)
{
AdviceStack stack = AspectManager.instance().getAdviceStack(stackName);
if (stack == null) throw new RuntimeException("Stack " + stackName + " not found.");
ClassAdvisor classAdvisor = null;
if (getInstance() instanceof Advised)
{
Advised advised = (Advised) getInstance();
classAdvisor = ((ClassAdvisor) advised._getAdvisor());
}
int interceptorsRemoved = 0;
for (InterceptorFactory factory : stack.getInterceptorFactories())
{
if (!factory.isDeployed()) continue;
Interceptor interceptor = factory.create(classAdvisor, null);
interceptorsRemoved += internalRemoveInterceptor(interceptor.getName());
}
if (interceptorChainObserver != null)
{
this.interceptorChainObserver.instanceInterceptorsRemoved(this, interceptorsRemoved);
}
}
public Domain getDomain()
{
throw new RuntimeException("getDomain() is only available when you use weaving with generated advisors");
}
/**
* Added to notify interceptor chain observer of interceptor chain garbage collection.
*/
protected void finalize()
{
ClassLoader classLoader = getClassAdvisor().getClazz().getClassLoader();
if (this.interceptorChainObserver == null || !AspectManager.getRegisteredCLs().containsKey(classLoader))
{
return;
}
this.interceptorChainObserver.allInstanceInterceptorsRemoved(this);
}
private Advisor getClassAdvisor()
{
if (classAdvisorRef != null)
{
return classAdvisorRef.get();
}
return null;
}
public Object getInstance()
{
if (instanceRef != null)
{
return instanceRef.get();
}
return null;
}
}