org.chromium.sdk/src/org/chromium/sdk/internal/tools/v8/V8ProtocolUtil.java
author Eugene Ostroukhov <eugeneo@symbian.org>
Mon, 07 Jun 2010 16:51:19 -0700
changeset 355 8726e95bcbba
parent 276 f2f4a1259de8
permissions -rw-r--r--
Initial commit of updated Chrome Java SDK
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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package org.chromium.sdk.internal.tools.v8;
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import java.util.ArrayList;
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import java.util.List;
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import org.chromium.sdk.Script;
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import org.chromium.sdk.Version;
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import org.chromium.sdk.Script.Type;
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import org.chromium.sdk.internal.DataWithRef;
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import org.chromium.sdk.internal.JsonUtil;
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import org.chromium.sdk.internal.PropertyReference;
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import org.chromium.sdk.internal.PropertyType;
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import org.chromium.sdk.internal.V8ContextFilter;
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import org.chromium.sdk.internal.protocol.AfterCompileBody;
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import org.chromium.sdk.internal.protocol.BacktraceCommandBody;
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import org.chromium.sdk.internal.protocol.BreakEventBody;
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import org.chromium.sdk.internal.protocol.BreakpointBody;
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import org.chromium.sdk.internal.protocol.ChangeLiveBody;
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import org.chromium.sdk.internal.protocol.CommandResponse;
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import org.chromium.sdk.internal.protocol.CommandResponseBody;
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import org.chromium.sdk.internal.protocol.EventNotification;
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import org.chromium.sdk.internal.protocol.EventNotificationBody;
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import org.chromium.sdk.internal.protocol.FailedCommandResponse;
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import org.chromium.sdk.internal.protocol.FrameObject;
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import org.chromium.sdk.internal.protocol.IncomingMessage;
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import org.chromium.sdk.internal.protocol.ListBreakpointsBody;
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import org.chromium.sdk.internal.protocol.ScopeBody;
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import org.chromium.sdk.internal.protocol.ScopeRef;
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import org.chromium.sdk.internal.protocol.SuccessCommandResponse;
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import org.chromium.sdk.internal.protocol.VersionBody;
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import org.chromium.sdk.internal.protocol.data.BreakpointInfo;
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import org.chromium.sdk.internal.protocol.data.ContextData;
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import org.chromium.sdk.internal.protocol.data.ContextHandle;
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import org.chromium.sdk.internal.protocol.data.FunctionValueHandle;
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import org.chromium.sdk.internal.protocol.data.ObjectValueHandle;
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import org.chromium.sdk.internal.protocol.data.PropertyObject;
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import org.chromium.sdk.internal.protocol.data.PropertyWithRef;
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import org.chromium.sdk.internal.protocol.data.PropertyWithValue;
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import org.chromium.sdk.internal.protocol.data.RefWithDisplayData;
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import org.chromium.sdk.internal.protocol.data.ScriptHandle;
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import org.chromium.sdk.internal.protocol.data.SomeHandle;
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import org.chromium.sdk.internal.protocol.data.SomeRef;
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import org.chromium.sdk.internal.protocol.data.SomeSerialized;
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import org.chromium.sdk.internal.protocol.data.ValueHandle;
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import org.chromium.sdk.internal.protocolparser.JsonProtocolModelParseException;
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import org.chromium.sdk.internal.protocolparser.JsonProtocolParseException;
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import org.chromium.sdk.internal.protocolparser.dynamicimpl.JsonProtocolParser;
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import org.chromium.sdk.internal.tools.v8.request.ScriptsMessage;
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import org.json.simple.JSONObject;
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/**
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 * A utility class to process V8 debugger messages.
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 */
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public class V8ProtocolUtil {
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  /**
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   * Computes a script type given a V8 Long type value
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   *
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   * @param typeNumber a type designator from a V8 JSON response
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   * @return a type corresponding to {@code typeNumber} or {@code null} if
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   *         {@code typeNumber == null}
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   */
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  public static Script.Type getScriptType(Long typeNumber) {
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    if (typeNumber == null) {
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      return null;
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    }
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    switch (typeNumber.intValue()) {
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      case ScriptsMessage.SCRIPTS_NORMAL:
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        return Type.NORMAL;
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      case ScriptsMessage.SCRIPTS_NATIVE:
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        return Type.NATIVE;
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      case ScriptsMessage.SCRIPTS_EXTENSION:
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        return Type.EXTENSION;
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      default:
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        throw new IllegalArgumentException("unknown script type: " + typeNumber);
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    }
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  }
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  /**
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   * Returns the value of "ref" field in object corresponding to the fieldName
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   * in parent.
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   *
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   * @param parent to get the object from
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   * @param fieldName of the object to get the "ref" from
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   * @return ref value or null if fieldName or "ref" not found
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   */
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  public static Long getObjectRef(SomeRef child) {
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    if (child == null) {
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      return null;
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    }
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    return child.ref();
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  }
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  /**
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   * Constructs {@code PropertyReference}s from the specified object, be it in
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   * the "original" or "inlineRefs" format.
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   *
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   * @param handle to get property references from
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   * @return an array of PropertyReferences
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   */
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  public static List<? extends PropertyReference> extractObjectProperties(
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      ObjectValueHandle handle) {
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    List<PropertyObject> props = handle.properties();
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    int propsLen = props.size();
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    List<PropertyReference> objProps = new ArrayList<PropertyReference>(propsLen);
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    for (int i = 0; i < propsLen; i++) {
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      PropertyObject prop = props.get(i);
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      putMirror(objProps, prop, PropertyNameGetter.SUBPROPERTY);
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    }
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    return objProps;
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  }
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  public static List<? extends PropertyReference> extractObjectInternalProperties(
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      ObjectValueHandle handle) {
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    List<PropertyReference> objProps = new ArrayList<PropertyReference>(3);
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    SomeRef protoObject = handle.protoObject();
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    RefWithDisplayData protoObjectRef = protoObject.asWithDisplayData();
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    if (protoObjectRef != null) {
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      putMirror(objProps, protoObjectRef, PropertyNameGetter.PROTO_OBJECT);
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    }
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    SomeRef constructorFunction = handle.constructorFunction();
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    RefWithDisplayData constructorFunctionRef = constructorFunction.asWithDisplayData();
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    if (constructorFunctionRef != null) {
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      putMirror(objProps, constructorFunctionRef, PropertyNameGetter.CONSTRUCTOR_FUNCTION);
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    }
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    return objProps;
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  }
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  static <OBJ> void putMirror(List<PropertyReference> refs, OBJ propertyObject,
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      V8ProtocolUtil.PropertyNameGetter<OBJ> nameGetter) {
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    PropertyReference propertyRef = V8ProtocolUtil.extractProperty(propertyObject, nameGetter);
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    if (propertyRef != null) {
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      refs.add(propertyRef);
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    }
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  }
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  /**
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   * Constructs one {@code PropertyReference} from the specified object, be it in
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   * the "original" or "inlineRefs" format.
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   *
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   * @param prop json object
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   * @param valuePropertyName name of value property in this prop object, might be null
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   * @return PropertyReference or null if we ignore this property
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   */
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  public static <OBJ> PropertyReference extractProperty(OBJ prop,
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      PropertyNameGetter<OBJ> nameGetter) {
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    Object name = nameGetter.getName(prop);
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    if (name == null) {
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      return null;
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    }
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    if (isInternalProperty(name)) {
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      return null;
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    }
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    DataWithRef propValue = nameGetter.getRef(prop);
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    Long propType = nameGetter.getPropertyType(prop);
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    // propType is NORMAL by default
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    int propTypeValue = propType != null
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        ? propType.intValue()
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        : PropertyType.NORMAL.value;
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    if (propTypeValue == PropertyType.FIELD.value ||
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        propTypeValue == PropertyType.CONSTANT_FUNCTION.value ||
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        propTypeValue == PropertyType.CALLBACKS.value ||
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        propTypeValue == PropertyType.NORMAL.value) {
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      return new PropertyReference(name, propValue);
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    }
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    return null;
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  }
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  static abstract class PropertyNameGetter<OBJ> {
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    static class SimpleNameGetter extends PropertyNameGetter<RefWithDisplayData> {
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      private final String name;
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      SimpleNameGetter(String name) {
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        this.name = name;
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      }
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      @Override
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      String getName(RefWithDisplayData ref) {
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        return name;
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      }
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      @Override
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      DataWithRef getRef(RefWithDisplayData prop) {
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        return DataWithRef.fromSomeRef(prop.getSuper());
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      }
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      @Override
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      Long getPropertyType(RefWithDisplayData prop) {
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        return null;
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      }
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    }
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    static final PropertyNameGetter<PropertyObject> LOCAL = new SubpropertyNameGetter() {
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      @Override
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      Object getName(PropertyObject ref) {
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        Object name = super.getName(ref);
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        if (V8ProtocolUtil.isInternalProperty(name)) {
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          return null;
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        }
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        return name;
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      }
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    };
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    /** The name of the "this" object to report as a variable name. */
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    static final PropertyNameGetter<RefWithDisplayData> THIS = new SimpleNameGetter("this");
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    static final PropertyNameGetter<RefWithDisplayData> PROTO_OBJECT =
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        new SimpleNameGetter("__proto__");
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    static final PropertyNameGetter<RefWithDisplayData> CONSTRUCTOR_FUNCTION =
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        new SimpleNameGetter("constructor");
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    static final PropertyNameGetter<PropertyObject> SUBPROPERTY = new SubpropertyNameGetter();
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    static class SubpropertyNameGetter extends PropertyNameGetter<PropertyObject> {
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      @Override
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      Object getName(PropertyObject ref) {
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        return ref.name();
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      }
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      @Override
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      DataWithRef getRef(PropertyObject prop) {
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        PropertyWithValue asPropertyWithValue = prop.asPropertyWithValue();
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        if (asPropertyWithValue != null) {
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          return DataWithRef.fromSomeRef(asPropertyWithValue.getValue());
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        } else {
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          return DataWithRef.fromLong(prop.asPropertyWithRef().ref());
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        }
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      }
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      @Override
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      Long getPropertyType(PropertyObject prop) {
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        PropertyWithRef asPropertyWithRef = prop.asPropertyWithRef();
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        if (asPropertyWithRef == null) {
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          return null;
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        }
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        return asPropertyWithRef.propertyType();
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      }
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    }
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    abstract DataWithRef getRef(OBJ prop);
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    /**
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     * @return property name or null if we should skip this property
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     */
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    abstract Object getName(OBJ ref);
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    abstract Long getPropertyType(OBJ prop);
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  }
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  /**
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   * @param propertyName the property name to check
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   * @return whether the given property name corresponds to an internal V8
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   *         property
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   */
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  public static boolean isInternalProperty(Object propertyName) {
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    if (propertyName instanceof String == false) {
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      return false;
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    }
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    String propertyNameStr = (String) propertyName;
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    // Chrome can return properties like ".arguments". They should be ignored.
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    return propertyNameStr.length() == 0 || propertyNameStr.startsWith(".");
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  }
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  /**
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   * Gets a function name from the given function handle.
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   *
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   * @param functionObject the function handle
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   * @return the actual of inferred function name. Will handle {@code null} or
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   *         unnamed functions
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   */
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  public static String getFunctionName(JSONObject functionObject) {
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    if (functionObject == null) {
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      return "<unknown>";
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    } else {
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      String name = getNameOrInferred(functionObject, V8Protocol.LOCAL_NAME);
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      if (isNullOrEmpty(name)) {
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        return "(anonymous function)";
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      } else {
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        return name;
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      }
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   279
    }
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  }
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  /**
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   * Gets a script id from a script response.
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   284
   *
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   * @param scriptObject to get the "id" value from
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   286
   * @return the script id
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   287
   */
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   288
  public static Long getScriptIdFromResponse(ScriptHandle scriptObject) {
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   289
    return scriptObject.id();
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   290
  }
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diff changeset
   291
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   292
  /**
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   293
   * Determines if a {@code script} is valid in the current debug context.
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   294
   * Returns {@code null} if it is not, otherwise returns {@code script}.
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   295
   *
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   296
   * @param script to check and, possibly, modify
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   297
   * @param refs from the corresponding V8 response
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   298
   * @return script with a non-null name if the script is valid, {@code null}
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   299
   *         otherwise
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   300
   */
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   301
  public static ScriptHandle validScript(ScriptHandle script, List<SomeHandle> refs,
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   302
      V8ContextFilter contextFilter) {
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   303
    Long contextRef = V8ProtocolUtil.getObjectRef(script.context());
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   304
    for (int i = 0, size = refs.size(); i < size; i++) {
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   305
      SomeHandle ref = refs.get(i);
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parents:
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   306
      if (ref.handle() != contextRef.longValue()) {
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diff changeset
   307
        continue;
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   308
      }
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   309
      ContextHandle contextHandle;
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diff changeset
   310
      try {
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   311
        contextHandle = ref.asContextHandle();
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   312
      } catch (JsonProtocolParseException e) {
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   313
        throw new RuntimeException(e);
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   314
      }
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parents:
diff changeset
   315
      if (!contextFilter.isContextOurs(contextHandle)) {
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diff changeset
   316
        return null;
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diff changeset
   317
      }
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parents:
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   318
      return script;
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parents:
diff changeset
   319
    }
e4420d2515f1 Initial version of WRT Debugger.
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parents:
diff changeset
   320
    return null; // good context not found
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parents:
diff changeset
   321
  }
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parents:
diff changeset
   322
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diff changeset
   323
  public static Version parseVersionResponse(SuccessCommandResponse versionResponse) {
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diff changeset
   324
    VersionBody body;
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parents:
diff changeset
   325
    try {
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parents:
diff changeset
   326
      body = versionResponse.getBody().asVersionBody();
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parents:
diff changeset
   327
    } catch (JsonProtocolParseException e) {
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parents:
diff changeset
   328
      throw new RuntimeException(e);
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parents:
diff changeset
   329
    }
e4420d2515f1 Initial version of WRT Debugger.
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parents:
diff changeset
   330
    String versionString = body.getV8Version();
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parents:
diff changeset
   331
    if (versionString == null) {
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parents:
diff changeset
   332
      return null;
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parents:
diff changeset
   333
    }
e4420d2515f1 Initial version of WRT Debugger.
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parents:
diff changeset
   334
    return Version.parseString(versionString);
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parents:
diff changeset
   335
  }
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parents:
diff changeset
   336
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   337
  private static String getNameOrInferred(JSONObject obj, V8Protocol nameProperty) {
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parents:
diff changeset
   338
    String name = JsonUtil.getAsString(obj, nameProperty);
e4420d2515f1 Initial version of WRT Debugger.
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parents:
diff changeset
   339
    if (isNullOrEmpty(name)) {
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parents:
diff changeset
   340
      name = JsonUtil.getAsString(obj, V8Protocol.INFERRED_NAME);
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diff changeset
   341
    }
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parents:
diff changeset
   342
    return name;
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parents:
diff changeset
   343
  }
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diff changeset
   344
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parents:
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   345
  private static boolean isNullOrEmpty(String value) {
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parents:
diff changeset
   346
    return value == null || value.length() == 0;
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diff changeset
   347
  }
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parents:
diff changeset
   348
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parents:
diff changeset
   349
  public static JsonProtocolParser getV8Parser() {
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parents:
diff changeset
   350
    return parser;
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parents:
diff changeset
   351
  }
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parents:
diff changeset
   352
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parents:
diff changeset
   353
  private static final JsonProtocolParser parser;
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parents:
diff changeset
   354
  static {
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parents:
diff changeset
   355
    try {
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parents:
diff changeset
   356
      // TODO(peter.rybin): change to ParserHolder.
e4420d2515f1 Initial version of WRT Debugger.
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parents:
diff changeset
   357
      parser = new JsonProtocolParser(new Class<?>[] {
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TasneemS@US-TASNEEMS
parents:
diff changeset
   358
          IncomingMessage.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   359
          EventNotification.class,
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parents:
diff changeset
   360
          SuccessCommandResponse.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   361
          FailedCommandResponse.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   362
          CommandResponse.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   363
          BreakEventBody.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   364
          EventNotificationBody.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   365
          CommandResponseBody.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   366
          BacktraceCommandBody.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   367
          FrameObject.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   368
          BreakpointBody.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   369
          ScopeBody.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   370
          ScopeRef.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   371
          VersionBody.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   372
          AfterCompileBody.class,
355
8726e95bcbba Initial commit of updated Chrome Java SDK
Eugene Ostroukhov <eugeneo@symbian.org>
parents: 276
diff changeset
   373
          ChangeLiveBody.class,
8726e95bcbba Initial commit of updated Chrome Java SDK
Eugene Ostroukhov <eugeneo@symbian.org>
parents: 276
diff changeset
   374
          ListBreakpointsBody.class,
2
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TasneemS@US-TASNEEMS
parents:
diff changeset
   375
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   376
          SomeHandle.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   377
          ScriptHandle.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   378
          ValueHandle.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   379
          RefWithDisplayData.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   380
          PropertyObject.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   381
          PropertyWithRef.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   382
          PropertyWithValue.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   383
          ObjectValueHandle.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   384
          FunctionValueHandle.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   385
          SomeRef.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   386
          SomeSerialized.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   387
          ContextHandle.class,
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   388
          ContextData.class,
355
8726e95bcbba Initial commit of updated Chrome Java SDK
Eugene Ostroukhov <eugeneo@symbian.org>
parents: 276
diff changeset
   389
          BreakpointInfo.class,
2
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   390
      });
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   391
    } catch (JsonProtocolModelParseException e) {
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   392
      throw new RuntimeException(e);
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   393
    }
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   394
  }
e4420d2515f1 Initial version of WRT Debugger.
TasneemS@US-TASNEEMS
parents:
diff changeset
   395
}