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// Copyright (C) 2012 The Android Open Source Project
//
// 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 com.google.gerrit.client.rpc;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsArray;
import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.json.client.JSONObject;
import java.util.AbstractList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
public class Natives {
/**
* Get the names of defined properties on the object. The returned set iterates in the native
* iteration order, which may match the source order.
*/
public static Set<String> keys(JavaScriptObject obj) {
if (obj != null) {
return new JSONObject(obj).keySet();
}
return Collections.emptySet();
}
public static List<String> asList(final JsArrayString arr) {
if (arr == null) {
return null;
}
return new AbstractList<String>() {
@Override
public String set(int index, String element) {
String old = arr.get(index);
arr.set(index, element);
return old;
}
@Override
public String get(int index) {
return arr.get(index);
}
@Override
public int size() {
return arr.length();
}
};
}
public static <T extends JavaScriptObject> List<T> asList(final JsArray<T> arr) {
if (arr == null) {
return null;
}
return new AbstractList<T>() {
@Override
public T set(int index, T element) {
T old = arr.get(index);
arr.set(index, element);
return old;
}
@Override
public T get(int index) {
return arr.get(index);
}
@Override
public int size() {
return arr.length();
}
};
}
public static <T extends JavaScriptObject> JsArray<T> arrayOf(T element) {
JsArray<T> arr = JavaScriptObject.createArray().cast();
arr.push(element);
return arr;
}
public static JsArrayString arrayOf(Iterable<String> elements) {
JsArrayString arr = JavaScriptObject.createArray().cast();
for (String elem : elements) {
arr.push(elem);
}
return arr;
}
public static JsArrayString arrayOf(String element) {
JsArrayString arr = JavaScriptObject.createArray().cast();
arr.push(element);
return arr;
}
private Natives() {}
}
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