| /******************************************************************************* |
| * Copyright (c) 2006, 2007 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.core.internal.jdtutility; |
| |
| import org.eclipse.jdt.core.dom.AST; |
| import org.eclipse.jdt.core.dom.Expression; |
| import org.eclipse.jpt.utility.internal.StringTools; |
| |
| /** |
| * No conversion. |
| */ |
| public final class NullExpressionConverter |
| implements ExpressionConverter<Expression, Expression> |
| { |
| |
| // singleton |
| private static ExpressionConverter<Expression, Expression> INSTANCE = new NullExpressionConverter(); |
| |
| /** |
| * Return the singleton. |
| */ |
| public static ExpressionConverter<Expression, Expression> instance() { |
| if (INSTANCE == null) { |
| INSTANCE = new NullExpressionConverter(); |
| } |
| return INSTANCE; |
| } |
| |
| /** |
| * Ensure single instance. |
| */ |
| private NullExpressionConverter() { |
| super(); |
| } |
| |
| public Expression convert(Expression expression, AST ast) { |
| return expression; |
| } |
| |
| public Expression convert(Expression expression) { |
| return expression; |
| } |
| |
| @Override |
| public String toString() { |
| return StringTools.buildToStringFor(this); |
| } |
| |
| } |