| /* |
| * Copyright 2000-2014 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 org.jetbrains.plugins.groovy.lang.psi.util; |
| |
| import com.intellij.psi.PsiConstantEvaluationHelper; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.impl.ConstantExpressionEvaluator; |
| import org.jetbrains.annotations.Nullable; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.GrParenthesizedExpression; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.expressions.literals.GrLiteral; |
| |
| /** |
| * @author peter |
| */ |
| public class GroovyConstantExpressionEvaluator implements ConstantExpressionEvaluator { |
| |
| @Nullable |
| public static Object evaluate(@Nullable GrExpression expression) { |
| if (expression instanceof GrParenthesizedExpression) { |
| return evaluate(((GrParenthesizedExpression)expression).getOperand()); |
| } |
| if (expression instanceof GrLiteral) { |
| return ((GrLiteral)expression).getValue(); |
| } |
| return null; |
| } |
| |
| @Override |
| @Nullable |
| public Object computeConstantExpression(PsiElement expression, boolean throwExceptionOnOverflow) { |
| if (!(expression instanceof GrExpression)) return null; |
| return evaluate((GrExpression)expression); |
| } |
| |
| @Override |
| @Nullable |
| public Object computeExpression(PsiElement expression, |
| boolean throwExceptionOnOverflow, |
| @Nullable PsiConstantEvaluationHelper.AuxEvaluator auxEvaluator) { |
| if (!(expression instanceof GrExpression)) return null; |
| return evaluate((GrExpression)expression); |
| } |
| } |