| /* |
| * 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.debugger.engine.evaluation.expression; |
| |
| import com.intellij.debugger.engine.evaluation.EvaluateException; |
| import com.intellij.debugger.engine.evaluation.EvaluateExceptionUtil; |
| import com.intellij.debugger.engine.evaluation.EvaluationContextImpl; |
| import com.intellij.openapi.util.Comparing; |
| import com.sun.jdi.BooleanValue; |
| |
| /** |
| * @author lex |
| */ |
| public class WhileStatementEvaluator implements Evaluator { |
| private final Evaluator myConditionEvaluator; |
| private final Evaluator myBodyEvaluator; |
| private final String myLabelName; |
| |
| public WhileStatementEvaluator(Evaluator conditionEvaluator, Evaluator bodyEvaluator, String labelName) { |
| myConditionEvaluator = new DisableGC(conditionEvaluator); |
| myBodyEvaluator = new DisableGC(bodyEvaluator); |
| myLabelName = labelName; |
| } |
| |
| public Modifier getModifier() { |
| return myConditionEvaluator.getModifier(); |
| } |
| |
| public Object evaluate(EvaluationContextImpl context) throws EvaluateException { |
| Object value; |
| while (true) { |
| value = myConditionEvaluator.evaluate(context); |
| if (!(value instanceof BooleanValue)) { |
| throw EvaluateExceptionUtil.BOOLEAN_EXPECTED; |
| } |
| else { |
| if (!((BooleanValue)value).booleanValue()) { |
| break; |
| } |
| } |
| try { |
| myBodyEvaluator.evaluate(context); |
| } |
| catch (BreakException e) { |
| if (Comparing.equal(e.getLabelName(), myLabelName)) { |
| break; |
| } |
| else { |
| throw e; |
| } |
| } |
| catch (ContinueException e) { |
| if (!Comparing.equal(e.getLabelName(), myLabelName)) { |
| throw e; |
| } |
| } |
| } |
| |
| return value; |
| } |
| |
| } |