| /* |
| * 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.ui.tree.render; |
| |
| import com.intellij.debugger.engine.DebuggerUtils; |
| import com.intellij.debugger.engine.evaluation.*; |
| import com.intellij.debugger.engine.evaluation.expression.ExpressionEvaluator; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Computable; |
| import com.intellij.psi.*; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.reference.SoftReference; |
| |
| /** |
| * Created by IntelliJ IDEA. |
| * User: lex |
| * Date: Dec 27, 2003 |
| * Time: 7:56:13 PM |
| * To change this template use Options | File Templates. |
| */ |
| public abstract class CachedEvaluator { |
| private final CodeFragmentFactory myDefaultFragmentFactory; |
| |
| public CachedEvaluator() { |
| myDefaultFragmentFactory = new CodeFragmentFactoryContextWrapper(DefaultCodeFragmentFactory.getInstance()); |
| } |
| |
| private static class Cache { |
| protected ExpressionEvaluator myEvaluator; |
| protected EvaluateException myException; |
| protected PsiExpression myPsiChildrenExpression; |
| } |
| |
| SoftReference<Cache> myCache = new SoftReference<Cache>(null); |
| private TextWithImports myReferenceExpression; |
| |
| protected abstract String getClassName(); |
| |
| public TextWithImports getReferenceExpression() { |
| return myReferenceExpression != null ? myReferenceExpression : DebuggerUtils.getInstance().createExpressionWithImports(""); |
| } |
| |
| public void setReferenceExpression(TextWithImports referenceExpression) { |
| myReferenceExpression = referenceExpression; |
| clear(); |
| } |
| |
| public void clear() { |
| myCache.clear(); |
| } |
| |
| protected Cache initEvaluatorAndChildrenExpression(final Project project) { |
| final Cache cache = new Cache(); |
| try { |
| final PsiClass contextClass = DebuggerUtils.findClass(getClassName(), project, GlobalSearchScope.allScope(project)); |
| if(contextClass == null) { |
| throw EvaluateExceptionUtil.CANNOT_FIND_SOURCE_CLASS; |
| } |
| final PsiType contextType = DebuggerUtils.getType(getClassName(), project); |
| cache.myPsiChildrenExpression = null; |
| JavaCodeFragment codeFragment = myDefaultFragmentFactory.createCodeFragment(myReferenceExpression, contextClass, project); |
| codeFragment.forceResolveScope(GlobalSearchScope.allScope(project)); |
| codeFragment.setThisType(contextType); |
| DebuggerUtils.checkSyntax(codeFragment); |
| cache.myPsiChildrenExpression = ((PsiExpressionCodeFragment)codeFragment).getExpression(); |
| cache.myEvaluator = myDefaultFragmentFactory.getEvaluatorBuilder().build(cache.myPsiChildrenExpression, null); |
| } |
| catch (EvaluateException e) { |
| cache.myException = e; |
| } |
| |
| myCache = new SoftReference<Cache>(cache); |
| return cache; |
| } |
| |
| protected ExpressionEvaluator getEvaluator(final Project project) throws EvaluateException { |
| Cache cache = myCache.get(); |
| if(cache == null) { |
| cache = PsiDocumentManager.getInstance(project).commitAndRunReadAction(new Computable<Cache>() { |
| public Cache compute() { |
| return initEvaluatorAndChildrenExpression(project); |
| } |
| }); |
| } |
| |
| if(cache.myException != null) { |
| throw cache.myException; |
| } |
| |
| return cache.myEvaluator; |
| } |
| |
| protected PsiExpression getPsiExpression(final Project project) { |
| Cache cache = myCache.get(); |
| if(cache == null) { |
| cache = initEvaluatorAndChildrenExpression(project); |
| } |
| |
| return cache.myPsiChildrenExpression; |
| } |
| } |