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/*
* 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.impl.watch;
import com.intellij.debugger.DebuggerBundle;
import com.intellij.debugger.DebuggerContext;
import com.intellij.debugger.SourcePosition;
import com.intellij.debugger.engine.DebugProcessImpl;
import com.intellij.debugger.engine.DebuggerManagerThreadImpl;
import com.intellij.debugger.engine.DebuggerUtils;
import com.intellij.debugger.engine.JVMNameUtil;
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.impl.DebuggerContextImpl;
import com.intellij.debugger.impl.DebuggerSession;
import com.intellij.debugger.impl.PositionUtil;
import com.intellij.debugger.settings.NodeRendererSettings;
import com.intellij.debugger.ui.tree.FieldDescriptor;
import com.intellij.debugger.ui.tree.NodeDescriptor;
import com.intellij.debugger.ui.tree.render.ClassRenderer;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.*;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.StringBuilderSpinAllocator;
import com.sun.jdi.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.List;
public class FieldDescriptorImpl extends ValueDescriptorImpl implements FieldDescriptor{
public static final String OUTER_LOCAL_VAR_FIELD_PREFIX = "val$";
private final Field myField;
private final ObjectReference myObject;
private Boolean myIsPrimitive = null;
private final boolean myIsStatic;
public FieldDescriptorImpl(Project project, ObjectReference objRef, @NotNull Field field) {
super(project);
myObject = objRef;
myField = field;
myIsStatic = field.isStatic();
setLvalue(!field.isFinal());
}
@Override
public Field getField() {
return myField;
}
@Override
public ObjectReference getObject() {
return myObject;
}
@SuppressWarnings({"HardCodedStringLiteral"})
@Nullable
public SourcePosition getSourcePosition(final Project project, final DebuggerContextImpl context) {
if (context.getFrameProxy() == null) {
return null;
}
final ReferenceType type = myField.declaringType();
final JavaPsiFacade facade = JavaPsiFacade.getInstance(project);
final String fieldName = myField.name();
if (fieldName.startsWith(OUTER_LOCAL_VAR_FIELD_PREFIX)) {
// this field actually mirrors a local variable in the outer class
String varName = fieldName.substring(fieldName.lastIndexOf('$') + 1);
PsiElement element = PositionUtil.getContextElement(context);
if (element == null) {
return null;
}
PsiClass aClass = PsiTreeUtil.getParentOfType(element, PsiClass.class, false);
if (aClass == null) {
return null;
}
aClass = (PsiClass) aClass.getNavigationElement();
PsiVariable psiVariable = facade.getResolveHelper().resolveReferencedVariable(varName, aClass);
if (psiVariable == null) {
return null;
}
return SourcePosition.createFromOffset(psiVariable.getContainingFile(), psiVariable.getTextOffset());
}
else {
final DebuggerSession session = context.getDebuggerSession();
final GlobalSearchScope scope = session != null? session.getSearchScope() : GlobalSearchScope.allScope(myProject);
PsiClass aClass = facade.findClass(type.name().replace('$', '.'), scope);
if (aClass == null) {
// trying to search, assuming declaring class is an anonymous class
final DebugProcessImpl debugProcess = context.getDebugProcess();
if (debugProcess != null) {
try {
final List<Location> locations = type.allLineLocations();
if (!locations.isEmpty()) {
// important: use the last location to be sure the position will be within the anonymous class
final Location lastLocation = locations.get(locations.size() - 1);
final SourcePosition position = debugProcess.getPositionManager().getSourcePosition(lastLocation);
aClass = JVMNameUtil.getClassAt(position);
}
}
catch (AbsentInformationException ignored) {
}
catch (ClassNotPreparedException ignored) {
}
}
}
if (aClass != null) {
aClass = (PsiClass) aClass.getNavigationElement();
for (PsiField field : aClass.getFields()) {
if (fieldName.equals(field.getName())) {
return SourcePosition.createFromOffset(field.getContainingFile(), field.getTextOffset());
}
}
}
return null;
}
}
@Override
public void setAncestor(NodeDescriptor oldDescriptor) {
super.setAncestor(oldDescriptor);
final Boolean isPrimitive = ((FieldDescriptorImpl)oldDescriptor).myIsPrimitive;
if (isPrimitive != null) { // was cached
// do not loose cached info
myIsPrimitive = isPrimitive;
}
}
@Override
public boolean isPrimitive() {
if (myIsPrimitive == null) {
final Value value = getValue();
if (value != null) {
myIsPrimitive = super.isPrimitive();
}
else {
myIsPrimitive = DebuggerUtils.isPrimitiveType(myField.typeName()) ? Boolean.TRUE : Boolean.FALSE;
}
}
return myIsPrimitive.booleanValue();
}
@Override
public Value calcValue(EvaluationContextImpl evaluationContext) throws EvaluateException {
DebuggerManagerThreadImpl.assertIsManagerThread();
try {
return (myObject != null) ? myObject.getValue(myField) : myField.declaringType().getValue(myField);
}
catch (ObjectCollectedException ignored) {
throw EvaluateExceptionUtil.OBJECT_WAS_COLLECTED;
}
}
public boolean isStatic() {
return myIsStatic;
}
@Override
public String getName() {
final String fieldName = myField.name();
if (isOuterLocalVariableValue() && NodeRendererSettings.getInstance().getClassRenderer().SHOW_VAL_FIELDS_AS_LOCAL_VARIABLES) {
return StringUtil.trimStart(fieldName, OUTER_LOCAL_VAR_FIELD_PREFIX);
}
return fieldName;
}
public boolean isOuterLocalVariableValue() {
try {
return DebuggerUtils.isSynthetic(myField) && myField.name().startsWith(OUTER_LOCAL_VAR_FIELD_PREFIX);
}
catch (UnsupportedOperationException ignored) {
return false;
}
}
@Override
public String calcValueName() {
final ClassRenderer classRenderer = NodeRendererSettings.getInstance().getClassRenderer();
StringBuilder buf = StringBuilderSpinAllocator.alloc();
try {
buf.append(getName());
if (classRenderer.SHOW_DECLARED_TYPE) {
buf.append(": ");
buf.append(classRenderer.renderTypeName(myField.typeName()));
}
return buf.toString();
}
finally {
StringBuilderSpinAllocator.dispose(buf);
}
}
@Override
public PsiExpression getDescriptorEvaluation(DebuggerContext context) throws EvaluateException {
PsiElementFactory elementFactory = JavaPsiFacade.getInstance(context.getProject()).getElementFactory();
String fieldName;
if(isStatic()) {
String typeName = myField.declaringType().name().replace('$', '.');
typeName = DebuggerTreeNodeExpression.normalize(typeName, PositionUtil.getContextElement(context), context.getProject());
fieldName = typeName + "." + getName();
}
else {
//noinspection HardCodedStringLiteral
fieldName = isOuterLocalVariableValue()? StringUtil.trimStart(getName(), OUTER_LOCAL_VAR_FIELD_PREFIX) : "this." + getName();
}
try {
return elementFactory.createExpressionFromText(fieldName, null);
}
catch (IncorrectOperationException e) {
throw new EvaluateException(DebuggerBundle.message("error.invalid.field.name", getName()), e);
}
}
}
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