/*
* Copyright (c) 2012, Paul Merlin.
*
* Licensed 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.qi4j.runtime.activation;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
import org.qi4j.api.activation.Activator;
import org.qi4j.api.activation.PassivationException;
import org.qi4j.functional.Iterables;
/**
* Instance of a Qi4j Activators of one Activation target. Contains ordered
* Activators and roll the Activation on the target.
*
* @param <ActivateeType> Type of the activation target
*/
public class ActivatorsInstance<ActivateeType>
implements Activator<ActivateeType>
{
@SuppressWarnings( {"raw", "unchecked"} )
public static final ActivatorsInstance EMPTY = new ActivatorsInstance( Collections.emptyList() );
private final Iterable<Activator<ActivateeType>> activators;
public ActivatorsInstance( Iterable<Activator<ActivateeType>> activators )
{
this.activators = activators;
}
@Override
public void beforeActivation( ActivateeType activating )
throws Exception
{
for( Activator<ActivateeType> activator : activators )
{
activator.beforeActivation( activating );
}
}
@Override
public void afterActivation( ActivateeType activated )
throws Exception
{
for( Activator<ActivateeType> activator : activators )
{
activator.afterActivation( activated );
}
}
@Override
public void beforePassivation( ActivateeType passivating )
throws Exception
{
Set<Exception> exceptions = new LinkedHashSet<>();
for( Activator<ActivateeType> activator : Iterables.reverse( activators ) )
{
try
{
activator.beforePassivation( passivating );
}
catch( Exception ex )
{
exceptions.add( ex );
}
}
if( !exceptions.isEmpty() )
{
throw new PassivationException( exceptions );
}
}
@Override
public void afterPassivation( ActivateeType passivated )
throws Exception
{
Set<Exception> exceptions = new LinkedHashSet<>();
for( Activator<ActivateeType> activator : Iterables.reverse( activators ) )
{
try
{
activator.afterPassivation( passivated );
}
catch( Exception ex )
{
exceptions.add( ex );
}
}
if( !exceptions.isEmpty() )
{
throw new PassivationException( exceptions );
}
}
}