java/java-impl/src/com/intellij/psi/impl/PsiConstantEvaluationHelperImpl.java

   1 /*
   2  * Copyright 2000-2009 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.psi.impl;
  17
  18 import com.intellij.psi.*;
  19 import com.intellij.psi.util.ConstantExpressionUtil;
  20
  21 import java.util.Set;
  22
  23 /**
  24  * @author ven
  25  */
  26 public class PsiConstantEvaluationHelperImpl extends PsiConstantEvaluationHelper {
  27
  28   public Object computeConstantExpression(PsiElement expression) {
  29     return computeConstantExpression(expression, false);
  30   }
  31
  32   public Object computeConstantExpression(PsiElement expression, boolean throwExceptionOnOverflow) {
  33     if (expression == null) return null;
  34     ConstantExpressionEvaluator expressionEvaluator = LanguageConstantExpressionEvaluator.INSTANCE.forLanguage(expression.getLanguage());
  35     assert expressionEvaluator != null;
  36
  37     return expressionEvaluator.computeConstantExpression(expression, throwExceptionOnOverflow);
  38   }
  39
  40   @Override
  41   public Object computeExpression(final PsiExpression expression, final boolean throwExceptionOnOverflow, final AuxEvaluator auxEvaluator) {
  42     if (expression == null) return null;
  43     ConstantExpressionEvaluator expressionEvaluator = LanguageConstantExpressionEvaluator.INSTANCE.forLanguage(expression.getLanguage());
  44     assert expressionEvaluator != null;
  45     return expressionEvaluator.computeExpression(expression, throwExceptionOnOverflow, auxEvaluator);
  46   }
  47
  48   public static Object computeCastTo(PsiExpression expression, PsiType castTo, Set<PsiVariable> visitedVars) {
  49     Object value = JavaConstantExpressionEvaluator.computeConstantExpression(expression, visitedVars, false);
  50     if (value == null) return null;
  51     return ConstantExpressionUtil.computeCastTo(value, castTo);
  52   }
  53 }