1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     4 

     5 package org.chromium.sdk.internal;

     6 

     7 import java.util.ArrayList;

     8 import java.util.HashMap;

     9 import java.util.List;

    10 import java.util.Map;

    11 

    12 import org.chromium.sdk.JsScope;

    13 import org.chromium.sdk.JsVariable;

    14 

    15 /**

    16  * A generic implementation of the JsScope interface.

    17  */

    18 public class JsScopeImpl implements JsScope {

    19 

    20   private final CallFrameImpl callFrameImpl;

    21   private final ScopeMirror mirror;

    22   private List<JsVariable> properties = null;

    23 

    24   public JsScopeImpl(CallFrameImpl callFrameImpl, ScopeMirror mirror) {

    25     this.callFrameImpl = callFrameImpl;

    26     this.mirror = mirror;

    27   }

    28 

    29   public Type getType() {

    30     Type type = CODE_TO_TYPE.get(mirror.getType());

    31     if (type == null) {

    32       type = Type.UNKNOWN;

    33     }

    34     return type;

    35   }

    36 

    37   public synchronized List<? extends JsVariable> getVariables() {

    38     if (properties == null) {

    39       ValueLoader valueLoader = callFrameImpl.getInternalContext().getValueLoader();

    40       List<? extends PropertyReference> propertyRefs =

    41           valueLoader.loadScopeFields(mirror.getIndex(), callFrameImpl.getIdentifier());

    42       List<ValueMirror> propertyMirrors = valueLoader.getOrLoadValueFromRefs(propertyRefs);

    43 

    44       properties = new ArrayList<JsVariable>(propertyMirrors.size());

    45       for (int i = 0; i < propertyMirrors.size(); i++) {

    46         properties.add(new JsVariableImpl(callFrameImpl, propertyMirrors.get(i),

    47             propertyRefs.get(i).getName()));

    48       }

    49     }

    50     return properties;

    51   }

    52 

    53   private static final Map<Integer, Type> CODE_TO_TYPE;

    54   static {

    55     CODE_TO_TYPE = new HashMap<Integer, Type>();

    56     CODE_TO_TYPE.put(0, Type.GLOBAL);

    57     CODE_TO_TYPE.put(1, Type.LOCAL);

    58     CODE_TO_TYPE.put(2, Type.WITH);

    59     CODE_TO_TYPE.put(3, Type.CLOSURE);

    60     CODE_TO_TYPE.put(4, Type.CATCH);

    61   }

    62 }