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/*******************************************************************************
* Copyright (c) 2010, 2019 IBM Corporation and others.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.common.internal.strategy;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
/**
* A simple concrete implementation that uses a constructor provided values
* to implement abstract methods.
*
* @author cbateman
*
* @param <INPUT>
* @param <OUTPUT>
* @param <RESULTTYPE>
* @param <IDTYPE>
* @param <STRATEGYTYPE>
*/
public class SimpleStrategyComposite<INPUT, OUTPUT, RESULTTYPE, IDTYPE, STRATEGYTYPE extends IIdentifiableStrategy<INPUT,OUTPUT,IDTYPE>> extends
StrategyComposite<INPUT, OUTPUT, RESULTTYPE, IDTYPE, STRATEGYTYPE>
{
private final RESULTTYPE _noResultValue;
private final Collection<STRATEGYTYPE> _strategies;
/**
* Use the list of strategies and null as the no result value.
* @param strategies
*/
public SimpleStrategyComposite(final Collection<STRATEGYTYPE> strategies)
{
this(strategies, (RESULTTYPE) null);
}
/**
* Use the list of strategies and the provided no result value.
* @param strategies
* @param noResultValue
*/
public SimpleStrategyComposite(final Collection<STRATEGYTYPE> strategies, final RESULTTYPE noResultValue)
{
super();
_strategies = strategies;
_noResultValue = noResultValue;
}
/**
* Use the provided strategies, composition strategy and null for the no result value
* @param strategies
* @param compositionStrategy
*/
public SimpleStrategyComposite(final Collection<STRATEGYTYPE> strategies,
final AbstractCompositionStrategy<INPUT, OUTPUT, RESULTTYPE, STRATEGYTYPE> compositionStrategy)
{
this(strategies, null, compositionStrategy);
}
/**
* Use the provided strategies, composition strategy and null for the no result value
* @param strategies
* @param noResultValue
* @param compositionStrategy
*/
public SimpleStrategyComposite(final Collection<STRATEGYTYPE> strategies, final RESULTTYPE noResultValue,
final AbstractCompositionStrategy<INPUT, OUTPUT, RESULTTYPE, STRATEGYTYPE> compositionStrategy)
{
super(compositionStrategy);
_strategies = strategies;
_noResultValue = noResultValue;
}
@Override
public RESULTTYPE getNoResult()
{
return _noResultValue;
}
@Override
public Iterator<STRATEGYTYPE> getIterator()
{
return Collections.unmodifiableCollection(_strategies).iterator();
}
}
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