--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.chromium.sdk/src/org/chromium/sdk/internal/JsonUtil.java	Wed Dec 23 17:13:18 2009 -0800
@@ -0,0 +1,216 @@
+// 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.io.IOException;
+import java.io.StringWriter;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+import org.json.simple.JSONStreamAware;
+import org.json.simple.parser.JSONParser;
+import org.json.simple.parser.ParseException;
+
+/**
+ * A utility for JSON-related data conversion.
+ */
+public class JsonUtil {
+
+  private static final Logger LOGGER = Logger.getLogger(JsonUtil.class.getName());
+
+  /**
+   * Converts a JSONStreamAware into a String.
+   *
+   * @param object the object to convert
+   * @return a JSON String representation of the object
+   */
+  public static String streamAwareToJson(JSONStreamAware object) {
+    StringWriter out = new StringWriter();
+    try {
+      object.writeJSONString(out);
+    } catch (IOException e) {
+      return null;
+    }
+    return out.toString();
+  }
+
+  /**
+   * @param json a JSON representation of an object (rather than an array or any
+   *        other type)
+   * @return a JSONObject represented by json, or null if json does not
+   *         represent a valid JSONObject
+   * @throws ParseException
+   */
+  public static JSONObject jsonObjectFromJson(String json) throws ParseException {
+    JSONParser p = new JSONParser();
+    Object parsed = p.parse(json);
+    if (false == parsed instanceof JSONObject) {
+      LOGGER.log(Level.SEVERE, "Not a JSON object: {0}", json);
+      return null;
+    }
+    return (JSONObject) parsed;
+  }
+
+  /**
+   * Helper function to rip out an integer number from a JSON payload.
+   *
+   * @param obj JSON payload
+   * @param key to look up
+   * @return null if key not found or bad type
+   */
+  public static Long getAsLong(JSONObject obj, CharSequence key) {
+    String keyString = key.toString();
+    Object v = obj.get(keyString);
+    if (v instanceof Long || v == null) {
+      return (Long) v;
+    }
+
+    LOGGER.log(Level.SEVERE, "Key: {0}, found value: {1}", new Object[] {keyString, v});
+    return null;
+  }
+
+  /**
+   * Helper function to rip out a double from a JSON payload.
+   *
+   * @param obj JSON payload
+   * @param key to look up
+   * @return null if key not found or bad type
+   */
+  public static Double getAsDouble(JSONObject obj, CharSequence key) {
+    String keyString = key.toString();
+    Object v = obj.get(keyString);
+    if (v instanceof Double || v == null) {
+      return (Double) v;
+    }
+    LOGGER.log(Level.SEVERE, "Key: {0}, found value: {1}", new Object[] {keyString, v});
+    return null;
+  }
+
+  /**
+   * Helper function to rip out a string from a JSON payload.
+   *
+   * @param obj JSON payload
+   * @param key to look up
+   * @return null if key not found or bad type
+   */
+  public static String getAsString(JSONObject obj, CharSequence key) {
+    String keyString = key.toString();
+    Object v = obj.get(keyString);
+    if (v instanceof String || v == null) {
+      return (String) v;
+    }
+    return String.valueOf(v);
+  }
+
+  /**
+   * Helper function to rip out a Boolean from a JSON payload.
+   *
+   * @param obj JSON payload
+   * @param key to look up
+   * @return Boolean.FALSE if key not found
+   */
+  public static Boolean getAsBoolean(JSONObject obj, CharSequence key) {
+    String keyString = key.toString();
+    Object v = obj.get(keyString);
+    if (v instanceof Boolean || v == null) {
+      return v != null
+          ? (Boolean) v
+          : false;
+    }
+
+    LOGGER.log(Level.SEVERE, "Key: {0}, found value: {1}", new Object[] {keyString, v});
+    return false;
+  }
+
+  /**
+   * Helper function to rip out a nested JSON object from the payload.
+   *
+   * @param obj JSON payload
+   * @param key to look up
+   * @return null if key not found
+   */
+  public static JSONObject getAsJSON(JSONObject obj, CharSequence key) {
+    String keyString = key.toString();
+    Object v = obj.get(keyString);
+    if (v instanceof JSONObject || v == null) {
+      return (JSONObject) v;
+    }
+
+    LOGGER.log(Level.SEVERE, "Key: {0}, found value: {1}", new Object[] {keyString, v});
+    return null;
+  }
+
+  /**
+   * Helper function to rip out a nested JSON object from the payload or throw an exception.
+   * @param obj JSON payload
+   * @param key to look up
+   * @return not null
+   * @throws JsonException if failed to rip out the object
+   */
+  public static JSONObject getAsJSONStrict(JSONObject obj, CharSequence key) {
+    JSONObject result = getAsJSON(obj, key);
+    if (result == null) {
+      throw new JsonException("Failed to find property '" + key);
+    }
+    return result;
+  }
+
+  /**
+   * Helper function to rip out a JSONArray from the payload.
+   *
+   * @param obj JSON payload
+   * @param key to look up
+   * @return null if key not found
+   */
+  public static JSONArray getAsJSONArray(JSONObject obj, CharSequence key) {
+    String keyString = key.toString();
+    Object v = obj.get(keyString);
+    if (v instanceof JSONArray || v == null) {
+      return (JSONArray) v;
+    }
+
+    LOGGER.log(Level.SEVERE, "Key: {0}, found value: {1}", new Object[] {keyString, v});
+    return null;
+  }
+
+  /**
+   * Helper function to rip out a JSONArray from the payload or throw an exception.
+   *
+   * @param obj JSON payload
+   * @param key to look up
+   * @return not null
+   * @throws JsonException if failed to rip out the array
+   */
+  public static JSONArray getAsJSONArrayStrict(JSONObject obj, CharSequence key) {
+    JSONArray result = getAsJSONArray(obj, key);
+    if (result == null) {
+      throw new JsonException("Failed to find property '" + key + "' of array type");
+    }
+    return result;
+  }
+
+  /**
+   * @param value to check
+   * @return whether the value can be parsed as an integer
+   */
+  public static boolean isInteger(String value) {
+    try {
+      Integer.parseInt(value);
+      return true;
+    } catch (NumberFormatException e) {
+      return false;
+    }
+  }
+
+  public static String quoteString(String string) {
+    return "\"" + string + "\"";
+  }
+
+  private JsonUtil() {
+    // not instantiable
+  }
+}