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/**
* Copyright 2009 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 net.appjet.oui;
import org.mozilla.javascript.{Context,Scriptable,ScriptableObject};
import org.json.{JSONStringer,JSONObject,JSONArray};
object FastJSON {
def stringify(rhinoObj: Scriptable): String = {
return FastJSONStringify.stringify(rhinoObj);
}
def parse(exctx: ExecutionContext, source: String): Scriptable = {
return (new FastJSONParser(exctx)).parse(source);
}
}
//----------------------------------------------------------------
// FastJSONStringify
//----------------------------------------------------------------
object FastJSONStringify {
def stringify(rhinoObj: Scriptable): String = {
val stringer = new JSONStringer();
stringerizeScriptable(stringer, rhinoObj);
return stringer.toString();
}
private def stringerize(s: JSONStringer, v: Object) {
if (v == Context.getUndefinedValue) {
return;
}
v match {
case (o:Scriptable) => stringerizeScriptable(s, o);
case (o:Number) => {
val d = o.doubleValue;
if (d.toLong.toDouble == d) {
s.value(d.toLong);
}
else {
s.value(o);
}
}
case o => s.value(o);
}
}
private def stringerizeScriptable(stringer: JSONStringer, rhinoObj: Scriptable) {
if (rhinoObj.getClassName() == "Array") {
stringerizeArray(stringer, rhinoObj);
} else {
stringerizeObj(stringer, rhinoObj);
}
}
private def stringerizeObj(stringer: JSONStringer, rhinoObj: Scriptable) {
stringer.`object`();
for (id <- rhinoObj.getIds()) {
val k = id.toString();
var v:Object = null;
id match {
case (s:String) => { v = rhinoObj.get(s, rhinoObj); }
case (n:Number) => { v = rhinoObj.get(n.intValue, rhinoObj); }
case _ => {}
}
if (v != null && v != Scriptable.NOT_FOUND && v != Context.getUndefinedValue) {
stringer.key(k);
stringerize(stringer, v);
}
}
stringer.endObject();
}
private def stringerizeArray(stringer: JSONStringer, rhinoArray: Scriptable) {
stringer.`array`();
val ids:Array[Object] = rhinoArray.getIds();
var x = 0;
for (i <- 0 until ids.length) {
// we ignore string keys on js arrays. crockford's "offical"
// json library does this as well.
if (ids(i).isInstanceOf[Number]) {
val id:Int = ids(i).asInstanceOf[Number].intValue;
while (x < id) {
stringer.value(null);
x += 1;
}
val v:Object = rhinoArray.get(id, rhinoArray);
stringerize(stringer, v);
x += 1;
}
}
stringer.endArray();
}
}
//----------------------------------------------------------------
// FastJSONParse
//----------------------------------------------------------------
class FastJSONParser(val ctx:ExecutionContext) {
def parse(source: String): Scriptable = {
if (source(0) == '[') {
jsonToRhino(new JSONArray(source)).asInstanceOf[Scriptable];
} else {
jsonToRhino(new JSONObject(source)).asInstanceOf[Scriptable];
}
}
private def newObj(): Scriptable = {
Context.getCurrentContext().newObject(ctx.runner.globalScope);
}
private def newArray(): Scriptable = {
Context.getCurrentContext().newArray(ctx.runner.globalScope, 0);
}
private def jsonToRhino(json: Object): Object = {
json match {
case (o:JSONArray) => jsonArrayToRhino(o);
case (o:JSONObject) => jsonObjectToRhino(o);
case o if (o == JSONObject.NULL) => null;
case o => o;
}
}
private def jsonArrayToRhino(json: JSONArray): Scriptable = {
val o:Scriptable = newArray();
for (i <- 0 until json.length()) {
o.put(i, o, jsonToRhino(json.get(i)));
}
return o;
}
private def jsonObjectToRhino(json: JSONObject): Scriptable = {
val o:Scriptable = newObj();
val names:Array[String] = JSONObject.getNames(json);
if (names != null) {
for (n <- names) {
val i = try { Some(n.toInt); } catch { case (e:NumberFormatException) => None };
if (i.isDefined) {
o.put(i.get, o, jsonToRhino(json.get(n)));
}
else {
o.put(n, o, jsonToRhino(json.get(n)));
}
}
}
return o;
}
}
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