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/*******************************************************************************
* Copyright (c) 2007, 2013 Oracle. All rights reserved.
* 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/.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.common.utility.internal.factory;
import java.io.Serializable;
import org.eclipse.jpt.common.utility.factory.Factory;
import org.eclipse.jpt.common.utility.internal.ObjectTools;
/**
* Singleton implementation of the factory interface that will throw an
* {@link UnsupportedOperationException exception} when executed.
*/
public final class DisabledFactory<T>
implements Factory<T>, Serializable
{
@SuppressWarnings("rawtypes")
public static final Factory INSTANCE = new DisabledFactory();
@SuppressWarnings("unchecked")
public static <T> Factory<T> instance() {
return INSTANCE;
}
// ensure single instance
private DisabledFactory() {
super();
}
// throw an exception
public T create() {
throw new UnsupportedOperationException();
}
@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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