/*
* 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.webbeans.intercept;
import org.apache.webbeans.util.ExceptionUtil;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.InterceptionType;
import javax.enterprise.inject.spi.Interceptor;
import javax.interceptor.InvocationContext;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* InvocationContext for lifecycle methods like @PostConstruct, etc.
*/
public class LifecycleInterceptorInvocationContext<T> implements InvocationContext
{
private T target;
private InterceptionType type;
private List<Interceptor<?>> interceptors;
private Map<Interceptor<?>, ?> instances;
private Map<String, Object> contextData = new HashMap<String, Object>();
private int interceptorIndex = 0;
private List<AnnotatedMethod<?>> lifecycleMethods;
public LifecycleInterceptorInvocationContext(T target, InterceptionType type, List<Interceptor<?>> interceptors, Map<Interceptor<?>, ?> instances,
List<AnnotatedMethod<?>> lifecycleMethods)
{
this.target = target;
this.type = type;
this.interceptors = interceptors;
this.instances = instances;
this.lifecycleMethods = lifecycleMethods;
}
@Override
public T getTarget()
{
return target;
}
@Override
public Map<String, Object> getContextData()
{
return contextData;
}
public void setContextData(Map<String, Object> contextData)
{
this.contextData = contextData;
}
@Override
public Object proceed() throws Exception
{
if (interceptors != null && interceptorIndex < interceptors.size())
{
Interceptor interceptor = interceptors.get(interceptorIndex++);
if (interceptor.intercepts(type))
{
return interceptor.intercept(type, instances.get(interceptor), this);
}
else
{
return proceed();
}
}
else
{
if (lifecycleMethods != null)
{
// only if there is a lifecycle method, otherwise re immediately return
for (AnnotatedMethod<?> lifecycleMethod : lifecycleMethods)
{ Method m = lifecycleMethod.getJavaMember();
if (!m.isAccessible())
{
m.setAccessible(true);
}
try
{
m.invoke(getTarget());
}
catch (final InvocationTargetException ite)
{
throw ExceptionUtil.throwAsRuntimeException(ite.getCause());
}
}
}
// else, see interceptors spec
// "For lifecycle callback interceptor methods, if there is no callback method
// defined on the target class, the invocation of proceed in the last
// interceptor method in the chain is a no-op, and null is returned."
return null;
}
}
@Override
public Method getMethod()
{
return null;
}
@Override
public Object[] getParameters()
{
return new Object[0];
}
@Override
public void setParameters(Object[] parameters)
{
}
@Override
public Object getTimer()
{
return null;
}
}