/*
* 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.myfaces.extensions.cdi.jsf.impl.listener.phase;
import org.apache.myfaces.extensions.cdi.core.api.config.view.View;
import org.apache.myfaces.extensions.cdi.core.api.config.view.ViewConfig;
import org.apache.myfaces.extensions.cdi.jsf.api.listener.phase.BeforePhase;
import org.apache.myfaces.extensions.cdi.jsf.api.listener.phase.AfterPhase;
import org.apache.myfaces.extensions.cdi.jsf.impl.config.view.ViewConfigCache;
import javax.interceptor.Interceptor;
import javax.interceptor.AroundInvoke;
import javax.interceptor.InvocationContext;
import javax.faces.context.FacesContext;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.io.Serializable;
/**
* @author Gerhard Petracek
*/
@View(ViewControllerInterceptor.PlaceHolderConfig.class)
@Interceptor
public class ViewControllerInterceptor implements Serializable
{
private static final long serialVersionUID = -1562171889458823736L;
interface PlaceHolderConfig extends ViewConfig {}
@AroundInvoke
public Object filterPhaseListenerMethods(InvocationContext invocationContext) throws Exception
{
Object result = null;
if(invokeListenerMethod(invocationContext))
{
result = invocationContext.proceed();
}
return result;
}
private boolean invokeListenerMethod(InvocationContext invocationContext)
{
if(!isObserverMethod(invocationContext))
{
return true;
}
View view = getViewAnnotation(invocationContext);
String viewId = FacesContext.getCurrentInstance().getViewRoot().getViewId();
if(view.inline().length > 1 || !"".equals(view.inline()[0]))
{
return isMethodBoundToView(view.inline(), viewId);
}
return isMethodBoundToViewDefinition(view.value(), viewId);
}
private boolean isObserverMethod(InvocationContext invocationContext)
{
for(Annotation[] annotations : invocationContext.getMethod().getParameterAnnotations())
{
for(Annotation annotation : annotations)
{
if(BeforePhase.class.isAssignableFrom(annotation.annotationType()) ||
AfterPhase.class.isAssignableFrom(annotation.annotationType()))
{
return true;
}
}
}
return false;
}
private View getViewAnnotation(InvocationContext invocationContext)
{
View view;
Method method = invocationContext.getMethod();
if(method.isAnnotationPresent(View.class))
{
view = method.getAnnotation(View.class);
}
else
{
view = method.getDeclaringClass().getAnnotation(View.class);
}
return view;
}
private boolean isMethodBoundToView(String[] viewIds, String viewId)
{
for(String current : viewIds)
{
if(current.equals(viewId))
{
return true;
}
}
return false;
}
private boolean isMethodBoundToViewDefinition (Class<? extends ViewConfig>[] viewDefinitions, String viewId)
{
for(Class<? extends ViewConfig> viewDefinition : viewDefinitions)
{
if(resolveViewId(viewDefinition).equals(viewId))
{
return true;
}
}
return false;
}
private String resolveViewId(Class<? extends ViewConfig> viewDefinitionClass)
{
return ViewConfigCache.getViewDefinition(viewDefinitionClass).getViewId();
}
}