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/*******************************************************************************
* Copyright (c) 2012, 2016 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal.closure;
import java.io.Serializable;
import org.eclipse.jpt.common.utility.closure.BiClosure;
import org.eclipse.jpt.common.utility.internal.ObjectTools;
/**
* BiClosure that will do nothing when executed.
*
* @param <A1> the type of the first object passed to the closure
* @param <A2> the type of the second object passed to the closure
*
* @see BiClosureAdapter
*/
public final class NullBiClosure<A1, A2>
implements BiClosure<A1, A2>, Serializable
{
@SuppressWarnings("rawtypes")
public static final BiClosure INSTANCE = new NullBiClosure();
@SuppressWarnings("unchecked")
public static <A1, A2> BiClosure<A1, A2> instance() {
return INSTANCE;
}
// ensure single instance
private NullBiClosure() {
super();
}
public void execute(A1 argument1, A2 argument2) {
// NOP
}
@Override
public String toString() {
return ObjectTools.singletonToString(this);
}
private static final long serialVersionUID = 1L;
private Object readResolve() {
// replace this object with the singleton
return INSTANCE;
}
}
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