/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file 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.ejb3.interceptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import javax.interceptor.InvocationContext;
import javax.ejb.PostActivate;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.ejb.PrePassivate;
import org.jboss.ejb3.BeanContext;
/**
*
* @author <a href="kabir.khan@jboss.com">Kabir Khan</a>
* @version $Revision: 60233 $
*/
public abstract class LifecycleInvocationContextImpl implements InvocationContext
{
private int currentInterceptor;
private int currentMethod;
BeanContext beanContext;
InterceptorInfo[] interceptorInfos;
Object[] instances;
private Method[] beanMethods;
private HashMap metadata;
protected LifecycleInvocationContextImpl()
{
}
public static InvocationContext getLifecycleInvocationContext(Class type, BeanContext beanContext, InterceptorInfo[] interceptorInfos, Method[] beanMethods)
{
LifecycleInvocationContextImpl ic = null;
if (type == PostConstruct.class) ic = new PostConstructICtxImpl();
else if (type == PostActivate.class) ic = new PostActivateICtxImpl();
else if (type == PrePassivate.class) ic = new PrePassivateICtxImpl();
else if (type == PreDestroy.class) ic = new PreDestroyICtxImpl();
else throw new RuntimeException("Unsupported lifecycle event: " + type);
ic.instances = beanContext.getInterceptorInstances(interceptorInfos);
if (interceptorInfos.length != ic.instances.length)
{
throw new RuntimeException("interceptorInfos and instances have different length");
}
ic.beanContext = beanContext;
ic.beanMethods = beanMethods;
ic.interceptorInfos = interceptorInfos;
return ic;
}
public Object getTarget()
{
return beanContext.getInstance();
}
public Method getMethod()
{
return null;
}
public Object[] getParameters()
{
return new Object[0];
}
public void setParameters(Object[] params)
{
//Do nothing
}
public java.util.Map getContextData()
{
if (metadata == null) {
metadata = new HashMap();
}
return metadata;
}
public Object proceed() throws Exception
{
if (currentInterceptor < interceptorInfos.length)
{
int oldInterceptor = currentInterceptor;
int oldMethod = currentMethod;
try
{
int curr = currentInterceptor;
int currMethod = currentMethod++;
InterceptorInfo info = interceptorInfos[curr];
if (currMethod == getLifecycleMethods(info).length)
{
curr = ++currentInterceptor;
currentMethod = 0;
currMethod = currentMethod++;
info = (curr < interceptorInfos.length) ? interceptorInfos[curr] : null;
}
if (info != null)
{
try
{
Method[] methods = getLifecycleMethods(info);
return methods[currMethod].invoke(instances[curr], this);
}
catch (InvocationTargetException e)
{
if (e.getTargetException() instanceof Exception)
{
throw ((Exception) e.getCause());
}
else
{
throw new RuntimeException(e.getCause());
}
}
}
}
finally
{
// so that interceptors like clustering can reinvoke down the chain
currentInterceptor = oldInterceptor;
currentMethod = oldMethod;
}
}
if (beanMethods != null)
{
try
{
for (Method beanMethod : beanMethods)
{
beanMethod.invoke(getTarget(), new Object[0]);
}
}
catch (InvocationTargetException e)
{
if (e.getTargetException() instanceof Exception)
{
throw ((Exception) e.getCause());
}
else
{
throw new RuntimeException(e.getCause());
}
}
finally
{
}
}
return null;
}
abstract Method[] getLifecycleMethods(InterceptorInfo info);
public static class PostConstructICtxImpl extends LifecycleInvocationContextImpl
{
Method[] getLifecycleMethods(InterceptorInfo info)
{
return info.getPostConstructs();
}
}
public static class PostActivateICtxImpl extends LifecycleInvocationContextImpl
{
Method[] getLifecycleMethods(InterceptorInfo info)
{
return info.getPostActivates();
}
}
public static class PrePassivateICtxImpl extends LifecycleInvocationContextImpl
{
Method[] getLifecycleMethods(InterceptorInfo info)
{
return info.getPrePassivates();
}
}
public static class PreDestroyICtxImpl extends LifecycleInvocationContextImpl
{
Method[] getLifecycleMethods(InterceptorInfo info)
{
return info.getPreDestroys();
}
}
}
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