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/*******************************************************************************
* Copyright (c) 2007, 2008 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.core.internal.utility.jdt;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jpt.common.core.utility.jdt.DeclarationAnnotationElementAdapter;
import org.eclipse.jpt.common.core.utility.jdt.ModifiedDeclaration;
/**
* Behaviorless implementation.
*/
public class NullDeclarationAnnotationElementAdapter<T>
implements DeclarationAnnotationElementAdapter<T>
{
// singleton
@SuppressWarnings("rawtypes")
private static final DeclarationAnnotationElementAdapter INSTANCE
= new NullDeclarationAnnotationElementAdapter();
/**
* Return the singleton.
*/
@SuppressWarnings("unchecked")
public static <S> DeclarationAnnotationElementAdapter<S> instance() {
return INSTANCE;
}
/**
* Ensure single instance.
*/
private NullDeclarationAnnotationElementAdapter() {
super();
}
public T getValue(ModifiedDeclaration declaration) {
return null;
}
public void setValue(T value, ModifiedDeclaration declaration) {
// do nothing
}
public ASTNode getAstNode(ModifiedDeclaration declaration) {
return declaration.getDeclaration();
}
public Expression getExpression(ModifiedDeclaration declaration) {
return null;
}
}
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