--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/internal/JsScopeImpl.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,62 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.sdk.internal;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.chromium.sdk.JsScope;
+import org.chromium.sdk.JsVariable;
+
+/**
+ * A generic implementation of the JsScope interface.
+ */
+public class JsScopeImpl implements JsScope {
+
+  private final CallFrameImpl callFrameImpl;
+  private final ScopeMirror mirror;
+  private List<JsVariable> properties = null;
+
+  public JsScopeImpl(CallFrameImpl callFrameImpl, ScopeMirror mirror) {
+    this.callFrameImpl = callFrameImpl;
+    this.mirror = mirror;
+  }
+
+  public Type getType() {
+    Type type = CODE_TO_TYPE.get(mirror.getType());
+    if (type == null) {
+      type = Type.UNKNOWN;
+    }
+    return type;
+  }
+
+  public synchronized List<? extends JsVariable> getVariables() {
+    if (properties == null) {
+      ValueLoader valueLoader = callFrameImpl.getInternalContext().getValueLoader();
+      List<? extends PropertyReference> propertyRefs =
+          valueLoader.loadScopeFields(mirror.getIndex(), callFrameImpl.getIdentifier());
+      List<ValueMirror> propertyMirrors = valueLoader.getOrLoadValueFromRefs(propertyRefs);
+
+      properties = new ArrayList<JsVariable>(propertyMirrors.size());
+      for (int i = 0; i < propertyMirrors.size(); i++) {
+        properties.add(new JsVariableImpl(callFrameImpl, propertyMirrors.get(i),
+            propertyRefs.get(i).getName()));
+      }
+    }
+    return properties;
+  }
+
+  private static final Map<Integer, Type> CODE_TO_TYPE;
+  static {
+    CODE_TO_TYPE = new HashMap<Integer, Type>();
+    CODE_TO_TYPE.put(0, Type.GLOBAL);
+    CODE_TO_TYPE.put(1, Type.LOCAL);
+    CODE_TO_TYPE.put(2, Type.WITH);
+    CODE_TO_TYPE.put(3, Type.CLOSURE);
+    CODE_TO_TYPE.put(4, Type.CATCH);
+  }
+}