/*
* Copyright (c) 2012, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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.google.dart.tools.debug.core.server;
import com.google.common.util.concurrent.Uninterruptibles;
import com.google.dart.tools.core.utilities.general.StringUtilities;
import com.google.dart.tools.debug.core.DartDebugCorePlugin;
import com.google.dart.tools.debug.core.dartium.DartiumDebugValue.ValueCallback;
import com.google.dart.tools.debug.core.expr.IExpressionEvaluator;
import com.google.dart.tools.debug.core.expr.WatchExpressionResult;
import com.google.dart.tools.debug.core.util.DebuggerUtils;
import com.google.dart.tools.debug.core.util.IDartDebugValue;
import org.eclipse.debug.core.DebugEvent;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IDebugTarget;
import org.eclipse.debug.core.model.IValue;
import org.eclipse.debug.core.model.IVariable;
import org.eclipse.debug.core.model.IWatchExpressionListener;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
/**
* An IValue implementation for VM debugging.
*/
public class ServerDebugValue extends ServerDebugElement implements IValue, IDartDebugValue,
IExpressionEvaluator {
static ServerDebugValue createValue(IDebugTarget target, VmValue value) {
if (value != null && value.isList()) {
return new ServerDebugIndexedValue(target, value);
} else {
return new ServerDebugValue(target, value);
}
}
protected VmValue value;
private IValueRetriever valueRetriever;
protected List<IVariable> fields;
protected ServerDebugValue(IDebugTarget target, IValueRetriever valueRetriever) {
super(target);
this.valueRetriever = valueRetriever;
}
protected ServerDebugValue(IDebugTarget target, VmValue value) {
super(target);
this.value = value;
}
protected ServerDebugValue(ServerDebugTarget target) {
super(target);
}
public void computeDetail(final ValueCallback callback) {
if (value == null) {
callback.detailComputed(getValueString_impl());
} else if (value.isPrimitive() || value.isNull()
|| !DartDebugCorePlugin.getPlugin().getInvokeToString()) {
try {
// If the value is a primitive type, just return the display string.
callback.detailComputed(getDisplayString());
} catch (DebugException e) {
callback.detailComputed(null);
}
} else {
// Otherwise try and call the toString() method of the object.
try {
getConnection().callToString(value, new VmCallback<VmValue>() {
@Override
public void handleResult(VmResult<VmValue> result) {
if (result.isError()) {
callback.detailComputed(result.getError());
} else {
callback.detailComputed(StringUtilities.stripQuotes(result.getResult().getText()));
}
}
});
} catch (IOException e) {
DartDebugCorePlugin.logError(e);
callback.detailComputed(null);
}
}
}
@Override
public void evaluateExpression(final String expression, final IWatchExpressionListener listener) {
if (valueRetriever != null) {
// This is not a valid object to evaluate expressions against.
listener.watchEvaluationFinished(WatchExpressionResult.error(expression, "undefined"));
return;
}
try {
getConnection().evaluateObject(
value.getIsolate(),
value,
expression,
new VmCallback<VmValue>() {
@Override
public void handleResult(VmResult<VmValue> result) {
if (result.isError()) {
listener.watchEvaluationFinished(WatchExpressionResult.error(
expression,
result.getError()));
} else {
listener.watchEvaluationFinished(WatchExpressionResult.value(
expression,
ServerDebugValue.createValue(getTarget(), result.getResult())));
}
}
});
} catch (IOException e) {
DebugException exception = createDebugException(e);
listener.watchEvaluationFinished(WatchExpressionResult.exception(expression, exception));
}
}
public IValue getClassValue() {
if (value.getVmObject() != null) {
VmClass vmClass = getConnection().getClassInfoSync(value.getVmObject());
if (vmClass == null) {
return null;
} else {
return new ServerDebugValueClass(getTarget(), vmClass);
}
} else {
return null;
}
}
public String getDetailValue() {
if (value == null) {
return null;
} else if (value.isString()) {
try {
return printNull(getValueString());
} catch (DebugException ex) {
DartDebugCorePlugin.logError(ex);
return null;
}
} else {
return printNull(value.getText());
}
}
public String getDisplayString() throws DebugException {
return getValueString();
}
@Override
public String getId() {
if (value == null || value.isNull()) {
return null;
}
if (!value.isPrimitive() || value.isString()) {
return Integer.toString(value.getObjectId());
} else {
return null;
}
}
public IValue getLibraryValue() {
if (value.getVmObject() != null) {
VmLibrary vmLibrary = getConnection().getLibraryPropertiesSync(value.getVmObject());
if (vmLibrary == null) {
return null;
} else {
return new ServerDebugValueLibrary(getTarget(), vmLibrary);
}
} else {
return null;
}
}
@Override
public int getListLength() {
return value.getLength();
}
@Override
public String getReferenceTypeName() throws DebugException {
try {
if (value == null) {
return null;
}
if (value.isObject() && value.isNull()) {
return "null";
}
if (value.isObject()) {
fillInFields();
if (value.getVmObject() != null) {
return DebuggerUtils.demangleVmName(getConnection().getClassNameSync(value.getVmObject()));
}
}
return DebuggerUtils.demangleVmName(value.getKind());
} catch (Throwable t) {
throw createDebugException(t);
}
}
@Override
public String getValueString() throws DebugException {
try {
if (value == null) {
return getValueString_impl();
} else if (value.isString()) {
return DebuggerUtils.printString(getValueString_impl());
} else if (value.isObject()) {
try {
return getReferenceTypeName();
} catch (DebugException e) {
}
} else if (value.isList()) {
return "List[" + value.getLength() + "]";
}
return getValueString_impl();
} catch (Throwable t) {
throw createDebugException(t);
}
}
@Override
public IVariable[] getVariables() throws DebugException {
try {
fillInFields();
return fields.toArray(new IVariable[fields.size()]);
} catch (Throwable t) {
throw createDebugException(t);
}
}
public VmClass getVmClass() {
// TODO: implement
return null;
}
@Override
public boolean hasVariables() throws DebugException {
try {
if (isListValue()) {
return value.getLength() > 0;
} else if (fields != null) {
return fields.size() > 0;
} else if (valueRetriever != null) {
return valueRetriever.hasVariables();
} else {
return getVariables().length > 0;
}
} catch (Throwable t) {
throw createDebugException(t);
}
}
@Override
public boolean isAllocated() throws DebugException {
return true;
}
@Override
public boolean isListValue() {
return false;
}
@Override
public boolean isNull() {
return value != null && value.isNull();
}
@Override
public boolean isPrimitive() {
if (value == null) {
return false;
} else {
return value.isPrimitive();
}
}
@Override
public void reset() {
fields = null;
fireEvent(new DebugEvent(this, DebugEvent.CHANGE, DebugEvent.CONTENT));
}
protected synchronized void fillInFields() {
if (fields != null) {
return;
}
if (value == null) {
fields = valueRetriever.getVariables();
} else if (value.isObject()) {
fillInFieldsSync();
} else if (value.isList()) {
fillInListFields();
} else {
fields = Collections.emptyList();
}
}
protected void fillInFieldsSync() {
final CountDownLatch latch = new CountDownLatch(1);
final List<IVariable> tempFields = new ArrayList<IVariable>();
try {
getConnection().getObjectProperties(
value.getIsolate(),
value.getObjectId(),
new VmCallback<VmObject>() {
@Override
public void handleResult(VmResult<VmObject> result) {
try {
if (!result.isError()) {
value.setVmObject(result.getResult());
tempFields.addAll(convert(result.getResult()));
}
latch.countDown();
} catch (Throwable t) {
latch.countDown();
DartDebugCorePlugin.logError(t);
}
}
});
} catch (Exception e) {
latch.countDown();
}
Uninterruptibles.awaitUninterruptibly(latch, 250, TimeUnit.MILLISECONDS);
fields = tempFields;
}
protected void fillInListFields() {
fields = new ArrayList<IVariable>();
ServerDebugTarget target = getTarget();
VmConnection connection = getConnection();
for (int i = 0; i < value.getLength(); i++) {
ServerDebugVariable variable = new ServerDebugVariable(target, VmVariable.createArrayEntry(
connection,
value,
i));
fields.add(variable);
}
}
protected boolean isValueRetriever() {
return valueRetriever != null;
}
private List<IVariable> convert(VmObject vmObject) {
List<IVariable> vars = new ArrayList<IVariable>();
// Add instance fields.
for (VmVariable vmVariable : vmObject.getFields()) {
vars.add(new ServerDebugVariable(getTarget(), vmVariable));
}
return vars;
}
private String getValueString_impl() {
if (valueRetriever != null) {
return valueRetriever.getDisplayName();
} else if (value == null) {
return "null";
} else {
return value.getText();
}
}
private String printNull(String str) {
if (str == null) {
return "null";
}
return str;
}
}