elemental.js.util.JsMapFromIntTo.java Source code

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Here is the source code for elemental.js.util.JsMapFromIntTo.java

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/*
 * 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 elemental.js.util;

import com.google.gwt.core.client.JavaScriptObject;

import elemental.util.MapFromIntTo;

/**
 * JavaScript native implementation of {@link MapFromIntTo}.
 */
public final class JsMapFromIntTo<V> extends JavaScriptObject implements MapFromIntTo<V> {

    /**
     * Create a new empty map instance.
     */
    public static <T> JsMapFromIntTo<T> create() {
        return JavaScriptObject.createArray().cast();
    }

    protected JsMapFromIntTo() {
    }

    public native V get(int key) /*-{
                                 return this[key];
                                 }-*/;

    final static native boolean hasKey(JavaScriptObject map, int key) /*-{
                                                                      return map[key] !== undefined;
                                                                      }-*/;

    final static native void remove(JavaScriptObject map, int key) /*-{
                                                                   delete map[key];
                                                                   }-*/;

    final static native JsArrayOfInt keys(JavaScriptObject map) /*-{
                                                                var data = [];
                                                                for (var p in map) {
                                                                var key = parseInt(p);
                                                                if (!isNaN(key)) {
                                                                data.push(key);
                                                                }
                                                                }
                                                                return data;
                                                                }-*/;

    final public boolean hasKey(int key) {
        return hasKey(this, key);
    }

    final public JsArrayOfInt keys() {
        return keys(this);
    }

    public native void put(int key, V value) /*-{
                                             this[key] = value;
                                             }-*/;

    final public void remove(int key) {
        remove(this, key);
    }

    final public JsArrayOf<V> values() {
        return JsMapFromStringTo.values(this);
    }
}