--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/internal/JsDataTypeUtil.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,89 @@
+// 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.EnumMap;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.chromium.sdk.JsValue.Type;
+
+/**
+ * A utility that facilitates retrieval of {@link Type}s according to the
+ * JSON values received.
+ */
+public class JsDataTypeUtil {
+
+  private static Map<String, Type> jsonTypeToEnum = new HashMap<String, Type>();
+
+  private static Map<Type, String> enumToJsonType = new EnumMap<Type, String>(Type.class);
+
+  /**
+   * Class name of an Array object (TYPE_ARRAY).
+   */
+  public static final String CLASSNAME_ARRAY = "Array";
+
+  /**
+   * Class name of a Date object (TYPE_DATE).
+   */
+  private static final String CLASSNAME_DATE = "Date";
+
+  static {
+    put("object", Type.TYPE_OBJECT);
+    put("number", Type.TYPE_NUMBER);
+    put("string", Type.TYPE_STRING);
+    put("function", Type.TYPE_FUNCTION);
+    put("boolean", Type.TYPE_BOOLEAN);
+    put("undefined", Type.TYPE_UNDEFINED);
+    put("null", Type.TYPE_NULL);
+    put("error", Type.TYPE_ERROR);
+    put("array", Type.TYPE_ARRAY);
+    put("date", Type.TYPE_DATE);
+    put("regexp", Type.TYPE_REGEXP);
+  }
+
+  /**
+   * Gets a JsDataType using a V8 JavaScript type and, optionally, a class name
+   * of the object. If {@code className} is {@code null}, only the 1:1 mapping
+   * shall be used.
+   *
+   * @param jsonType the JS type from a JSON response
+   * @param className a nullable class name of the object
+   * @return a JsDataType corresponding to {@code jsonType} and, possibly,
+   *         modified according to {@code className}
+   */
+  public static Type fromJsonTypeAndClassName(String jsonType, String className) {
+    if (jsonType == null) {
+      return null;
+    }
+    if (CLASSNAME_DATE.equals(className)) {
+      // hack to use the TYPE_DATE type even though its type in V8 is "object"
+      return Type.TYPE_DATE;
+    } else if (CLASSNAME_ARRAY.equals(className)) {
+      // hack to use the TYPE_ARRAY type even though its type in V8 is "object"
+      return Type.TYPE_ARRAY;
+    }
+    return jsonTypeToEnum.get(jsonType);
+  }
+
+  /**
+   * Converts {@code type} to its JSON representation used in V8.
+   *
+   * @param type to convert
+   * @return a string name of the type understandable by V8
+   */
+  public static String getJsonString(Type type) {
+    return enumToJsonType.get(type);
+  }
+
+  private static void put(String jsonString, Type type) {
+    jsonTypeToEnum.put(jsonString, type);
+    enumToJsonType.put(type, jsonString);
+  }
+
+  private JsDataTypeUtil() {
+    // not instantiable
+  }
+}