/**
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.waveprotocol.wave.communication.gwt;
import com.google.gwt.core.client.JavaScriptObject;
/**
* A JsonSerializer that is implemented by custom javascript code that
* doesn't rely on browser support.
*
*/
public class JavascriptJsonSerializer implements JsonSerializer {
@Override
public native JavaScriptObject parse(String json) /*-{
return eval("(" + json + ")");
}-*/;
@Override
public native String serialize(JavaScriptObject obj) /*-{
var print = function (input, output) {
if (input === null || input === undefined) {
output.push("null");
} else if (typeof input == "object" && input.constructor === Array) {
var hasProperties = false;
output.push("[");
for (var property = 0; property < input.length; ++property) {
arguments.callee(input[property], output);
output.push(",");
hasProperties = true;
}
if (hasProperties) {
output.pop();
}
output.push("]");
} else if (typeof input == "object") {
var hasProperties = false;
output.push("{");
for (var property in input) {
if (input.hasOwnProperty(property) && typeof input[property] != "function") {
arguments.callee(property, output);
output.push(":");
arguments.callee(input[property], output);
output.push(",");
hasProperties = true;
}
}
if (hasProperties) {
output.pop();
}
output.push("}");
} else if (typeof input == "string") {
output.push(@com.google.gwt.core.client.JsonUtils::escapeValue(Ljava/lang/String;)(input));
} else if (typeof input == "boolean" || typeof input == "number") {
output.push(String(input));
}
// other types (such as function) are ignored.
};
var json = [];
print(obj, json);
return json.join("");
}-*/;
}