| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.psi; |
| |
| import org.jetbrains.annotations.Contract; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.concurrent.ConcurrentMap; |
| |
| /** |
| * Service for evaluating values of constant expressions. |
| * |
| * @author ven |
| * @see com.intellij.psi.JavaPsiFacade#getConstantEvaluationHelper() |
| */ |
| public abstract class PsiConstantEvaluationHelper { |
| /** |
| * Evaluates the value of the specified expression. |
| * |
| * @param expression the expression to evaluate. |
| * @return the result of the evaluation, or null if the expression is not a constant expression. |
| */ |
| @Nullable |
| @Contract("null -> null") |
| public Object computeConstantExpression(PsiElement expression) { |
| return computeConstantExpression(expression, false); |
| } |
| |
| /** |
| * Evaluates the value of the specified expression and optionally throws |
| * {@link com.intellij.psi.util.ConstantEvaluationOverflowException} if an overflow is detected |
| * during the evaluation. |
| * |
| * @param expression the expression to evaluate. |
| * @param throwExceptionOnOverflow if true, an exception is thrown if an overflow is detected during the evaluation. |
| * @return the result of the evaluation, or null if the expression is not a constant expression. |
| */ |
| public abstract Object computeConstantExpression(PsiElement expression, boolean throwExceptionOnOverflow); |
| |
| public abstract Object computeExpression(PsiExpression expression, boolean throwExceptionOnOverflow, |
| @Nullable final AuxEvaluator auxEvaluator); |
| |
| public interface AuxEvaluator { |
| Object computeExpression(final PsiExpression expression, final AuxEvaluator auxEvaluator); |
| |
| ConcurrentMap<PsiElement, Object> getCacheMap(final boolean overflow); |
| } |
| } |