108 lines
2.8 KiB
Java
108 lines
2.8 KiB
Java
// Copyright (C) 2012 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.gerrit.client.rpc;
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import com.google.gwt.core.client.JavaScriptObject;
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import com.google.gwt.core.client.JsArray;
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import com.google.gwt.core.client.JsArrayString;
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import com.google.gwt.json.client.JSONObject;
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import java.util.AbstractList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Set;
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public class Natives {
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/**
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* Get the names of defined properties on the object. The returned set iterates in the native
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* iteration order, which may match the source order.
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*/
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public static Set<String> keys(JavaScriptObject obj) {
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if (obj != null) {
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return new JSONObject(obj).keySet();
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}
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return Collections.emptySet();
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}
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public static List<String> asList(JsArrayString arr) {
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if (arr == null) {
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return null;
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}
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return new AbstractList<String>() {
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@Override
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public String set(int index, String element) {
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String old = arr.get(index);
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arr.set(index, element);
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return old;
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}
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@Override
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public String get(int index) {
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return arr.get(index);
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}
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@Override
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public int size() {
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return arr.length();
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}
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};
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}
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public static <T extends JavaScriptObject> List<T> asList(JsArray<T> arr) {
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if (arr == null) {
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return null;
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}
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return new AbstractList<T>() {
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@Override
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public T set(int index, T element) {
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T old = arr.get(index);
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arr.set(index, element);
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return old;
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}
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@Override
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public T get(int index) {
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return arr.get(index);
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}
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@Override
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public int size() {
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return arr.length();
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}
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};
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}
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public static <T extends JavaScriptObject> JsArray<T> arrayOf(T element) {
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JsArray<T> arr = JavaScriptObject.createArray().cast();
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arr.push(element);
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return arr;
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}
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public static JsArrayString arrayOf(Iterable<String> elements) {
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JsArrayString arr = JavaScriptObject.createArray().cast();
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for (String elem : elements) {
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arr.push(elem);
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}
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return arr;
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}
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public static JsArrayString arrayOf(String element) {
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JsArrayString arr = JavaScriptObject.createArray().cast();
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arr.push(element);
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return arr;
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}
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private Natives() {}
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}
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