| /* |
| * Copyright 2000-2011 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.impl.watch; |
| |
| import com.intellij.debugger.DebuggerBundle; |
| import com.intellij.debugger.DebuggerContext; |
| import com.intellij.debugger.DebuggerInvocationUtil; |
| import com.intellij.debugger.EvaluatingComputable; |
| import com.intellij.debugger.engine.ContextUtil; |
| import com.intellij.debugger.engine.StackFrameContext; |
| import com.intellij.debugger.engine.evaluation.EvaluateException; |
| import com.intellij.debugger.engine.evaluation.EvaluateExceptionUtil; |
| import com.intellij.debugger.engine.evaluation.EvaluationContextImpl; |
| import com.intellij.debugger.engine.evaluation.TextWithImports; |
| import com.intellij.debugger.engine.evaluation.expression.UnsupportedExpressionException; |
| import com.intellij.debugger.engine.evaluation.expression.ExpressionEvaluator; |
| import com.intellij.debugger.engine.evaluation.expression.Modifier; |
| import com.intellij.debugger.impl.DebuggerUtilsEx; |
| import com.intellij.debugger.impl.PositionUtil; |
| import com.intellij.debugger.jdi.StackFrameProxyImpl; |
| import com.intellij.debugger.jdi.VirtualMachineProxyImpl; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.registry.Registry; |
| import com.intellij.psi.*; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.refactoring.extractMethod.PrepareFailedException; |
| import com.intellij.refactoring.extractMethodObject.ExtractLightMethodObjectHandler; |
| import com.sun.jdi.ObjectCollectedException; |
| import com.sun.jdi.ObjectReference; |
| import com.sun.jdi.Value; |
| |
| /** |
| * @author lex |
| */ |
| public abstract class EvaluationDescriptor extends ValueDescriptorImpl{ |
| private Modifier myModifier; |
| protected TextWithImports myText; |
| |
| protected EvaluationDescriptor(TextWithImports text, Project project, Value value) { |
| super(project, value); |
| myText = text; |
| } |
| |
| protected EvaluationDescriptor(TextWithImports text, Project project) { |
| super(project); |
| setLvalue(false); |
| myText = text; |
| } |
| |
| protected abstract EvaluationContextImpl getEvaluationContext (EvaluationContextImpl evaluationContext); |
| |
| protected abstract PsiCodeFragment getEvaluationCode(StackFrameContext context) throws EvaluateException; |
| |
| public PsiCodeFragment createCodeFragment(PsiElement context) { |
| TextWithImports text = getEvaluationText(); |
| final PsiCodeFragment fragment = |
| DebuggerUtilsEx.findAppropriateCodeFragmentFactory(text, context).createCodeFragment(text, context, myProject); |
| fragment.forceResolveScope(GlobalSearchScope.allScope(myProject)); |
| return fragment; |
| } |
| |
| public final Value calcValue(final EvaluationContextImpl evaluationContext) throws EvaluateException { |
| try { |
| final EvaluationContextImpl thisEvaluationContext = getEvaluationContext(evaluationContext); |
| |
| ExpressionEvaluator evaluator = null; |
| try { |
| evaluator = DebuggerInvocationUtil.commitAndRunReadAction(myProject, new EvaluatingComputable<ExpressionEvaluator>() { |
| public ExpressionEvaluator compute() throws EvaluateException { |
| final PsiElement psiContext = PositionUtil.getContextElement(evaluationContext); |
| return DebuggerUtilsEx.findAppropriateCodeFragmentFactory(getEvaluationText(), psiContext).getEvaluatorBuilder() |
| .build(getEvaluationCode(thisEvaluationContext), ContextUtil.getSourcePosition(thisEvaluationContext)); |
| } |
| }); |
| } |
| catch (UnsupportedExpressionException ex) { |
| if (Registry.is("debugger.compiling.evaluator")) { |
| evaluator = DebuggerInvocationUtil.commitAndRunReadAction(myProject, new EvaluatingComputable<ExpressionEvaluator>() { |
| public ExpressionEvaluator compute() throws EvaluateException { |
| final PsiElement psiContext = PositionUtil.getContextElement(evaluationContext); |
| if (psiContext == null) { |
| return null; |
| } |
| PsiFile psiFile = psiContext.getContainingFile(); |
| PsiCodeFragment fragment = createCodeFragment(psiContext); |
| try { |
| ExtractLightMethodObjectHandler.ExtractedData data = ExtractLightMethodObjectHandler.extractLightMethodObject(myProject, |
| psiFile, fragment, CompilingEvaluator.getGeneratedClassName()); |
| if (data != null) { |
| return new CompilingEvaluator(getEvaluationText(), getEvaluationCode(thisEvaluationContext), psiContext, data, |
| EvaluationDescriptor.this); |
| } |
| } |
| catch (PrepareFailedException ignored) { |
| } |
| return null; |
| } |
| }); |
| } |
| if (evaluator == null) { |
| throw ex; |
| } |
| } |
| |
| if (!thisEvaluationContext.getDebugProcess().isAttached()) { |
| throw EvaluateExceptionUtil.PROCESS_EXITED; |
| } |
| StackFrameProxyImpl frameProxy = thisEvaluationContext.getFrameProxy(); |
| if (frameProxy == null) { |
| throw EvaluateExceptionUtil.NULL_STACK_FRAME; |
| } |
| |
| final Value value = evaluator.evaluate(thisEvaluationContext); |
| if (value instanceof ObjectReference) { |
| ObjectReference objRef = (ObjectReference)value; |
| if (VirtualMachineProxyImpl.isCollected(objRef)) { |
| throw EvaluateExceptionUtil.OBJECT_WAS_COLLECTED; |
| } |
| thisEvaluationContext.getSuspendContext().keep(objRef); |
| } |
| myModifier = evaluator.getModifier(); |
| setLvalue(myModifier != null); |
| |
| return value; |
| } |
| catch (final EvaluateException ex) { |
| throw new EvaluateException(ex.getLocalizedMessage(), ex); |
| } |
| catch (ObjectCollectedException ex) { |
| throw EvaluateExceptionUtil.OBJECT_WAS_COLLECTED; |
| } |
| } |
| |
| public String calcValueName() { |
| return getName(); |
| } |
| |
| public PsiExpression getDescriptorEvaluation(DebuggerContext context) throws EvaluateException { |
| PsiElement evaluationCode = getEvaluationCode(context); |
| if(evaluationCode instanceof PsiExpressionCodeFragment) { |
| return ((PsiExpressionCodeFragment)evaluationCode).getExpression(); |
| } |
| else { |
| throw new EvaluateException(DebuggerBundle.message("error.cannot.create.expression.from.code.fragment"), null); |
| } |
| } |
| |
| public Modifier getModifier() { |
| return myModifier; |
| } |
| |
| public boolean canSetValue() { |
| return super.canSetValue() && myModifier != null && myModifier.canSetValue(); |
| } |
| |
| public TextWithImports getEvaluationText() { |
| return myText; |
| } |
| } |