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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.engine.evaluation.EvaluateException;
import com.intellij.debugger.engine.evaluation.EvaluationContext;
import com.intellij.debugger.engine.evaluation.EvaluationContextImpl;
import com.intellij.debugger.impl.DebuggerContextImpl;
import com.intellij.debugger.jdi.StackFrameProxyImpl;
import com.intellij.debugger.ui.impl.nodes.NodeComparator;
import com.intellij.debugger.ui.tree.DebuggerTreeNode;
import com.intellij.debugger.ui.tree.NodeDescriptor;
import com.intellij.debugger.ui.tree.NodeManager;
import com.intellij.openapi.project.Project;
import com.intellij.util.StringBuilderSpinAllocator;
import com.intellij.util.containers.HashMap;
import com.sun.jdi.Location;
import com.sun.jdi.Method;
import com.sun.jdi.ReferenceType;
import org.jetbrains.annotations.Nullable;
import java.util.Comparator;
import java.util.Map;
/**
** finds correspondence between new descriptor and one created on the previous steps
** stores maximum CACHED_STEPS steps
** call saveState function to start new step
*/
public class NodeManagerImpl extends NodeDescriptorFactoryImpl implements NodeManager{
private static final Comparator<DebuggerTreeNode> ourNodeComparator = new NodeComparator();
private final DebuggerTree myDebuggerTree;
private String myHistoryKey = null;
private final Map<String, DescriptorTree> myHistories = new HashMap<String, DescriptorTree>();
public NodeManagerImpl(Project project, DebuggerTree tree) {
super(project);
myDebuggerTree = tree;
}
public static Comparator<DebuggerTreeNode> getNodeComparator() {
return ourNodeComparator;
}
public DebuggerTreeNodeImpl createNode(NodeDescriptor descriptor, EvaluationContext evaluationContext) {
((NodeDescriptorImpl)descriptor).setContext((EvaluationContextImpl)evaluationContext);
return DebuggerTreeNodeImpl.createNode(getTree(), (NodeDescriptorImpl)descriptor, (EvaluationContextImpl)evaluationContext);
}
public DebuggerTreeNodeImpl getDefaultNode() {
return DebuggerTreeNodeImpl.createNodeNoUpdate(getTree(), new DefaultNodeDescriptor());
}
public DebuggerTreeNodeImpl createMessageNode(MessageDescriptor descriptor) {
return DebuggerTreeNodeImpl.createNodeNoUpdate(getTree(), descriptor);
}
public DebuggerTreeNodeImpl createMessageNode(String message) {
return DebuggerTreeNodeImpl.createNodeNoUpdate(getTree(), new MessageDescriptor(message));
}
public void setHistoryByContext(final DebuggerContextImpl context) {
setHistoryByContext(context.getFrameProxy());
}
public void setHistoryByContext(StackFrameProxyImpl frameProxy) {
if (myHistoryKey != null) {
myHistories.put(myHistoryKey, getCurrentHistoryTree());
}
final String historyKey = getContextKey(frameProxy);
final DescriptorTree descriptorTree;
if (historyKey != null) {
final DescriptorTree historyTree = myHistories.get(historyKey);
descriptorTree = (historyTree != null)? historyTree : new DescriptorTree(true);
}
else {
descriptorTree = new DescriptorTree(true);
}
deriveHistoryTree(descriptorTree, frameProxy);
myHistoryKey = historyKey;
}
@Nullable
public String getContextKey(final StackFrameProxyImpl frame) {
return getContextKeyForFrame(frame);
}
@Nullable
public static String getContextKeyForFrame(final StackFrameProxyImpl frame) {
if (frame == null) {
return null;
}
try {
final Location location = frame.location();
final Method method = location.method();
final ReferenceType referenceType = location.declaringType();
final StringBuilder builder = StringBuilderSpinAllocator.alloc();
try {
return builder.append(referenceType.signature()).append("#").append(method.name()).append(method.signature()).toString();
}
finally {
StringBuilderSpinAllocator.dispose(builder);
}
}
catch (EvaluateException e) {
return null;
}
}
public void dispose() {
clearHistory();
super.dispose();
}
public void clearHistory() {
myHistories.clear();
}
private DebuggerTree getTree() {
return myDebuggerTree;
}
}
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