elemental.js.util.JsArrayOf.java Source code

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Here is the source code for elemental.js.util.JsArrayOf.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.ArrayOf;
import elemental.util.CanCompare;

/**
 * JavaScript native implementation of {@link ArrayOf}.
 */
public final class JsArrayOf<T> extends JavaScriptObject implements ArrayOf<T> {

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

    static native boolean isEmpty(JavaScriptObject array) /*-{
                                                          return !array.length;
                                                          }-*/;

    static native <T extends JavaScriptObject> T splice(JavaScriptObject array, int index, int count) /*-{
                                                                                                      return array.splice(index, count);
                                                                                                      }-*/;

    protected JsArrayOf() {
    }

    public native JsArrayOf<T> concat(ArrayOf<T> values) /*-{
                                                         return this.concat(values);
                                                         }-*/;

    public boolean contains(T value) {
        return indexOf(value) != -1;
    }

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

    public native int indexOf(T value) /*-{
                                       return this.indexOf(value);
                                       }-*/;

    public native void insert(int index, T value) /*-{
                                                  this.splice(index, 0, value);
                                                  }-*/;

    public boolean isEmpty() {
        return isEmpty(this);
    }

    /**
     * Convert each element of the array to a String and join them with a comma
     * separator. The value returned from this method may vary between browsers
     * based on how JavaScript values are converted into strings.
     */
    public String join() {
        // As per JS spec
        return join(",");
    }

    public native String join(String separator) /*-{
                                                return this.join(separator);
                                                }-*/;

    public native int length() /*-{
                               return this.length;
                               }-*/;

    public native T peek() /*-{
                           return this[this.length - 1];
                           }-*/;

    public native T pop() /*-{
                          return this.pop();
                          }-*/;

    /**
     * Pushes the given value onto the end of the array.
     */
    public native void push(T value) /*-{
                                     this[this.length] = value;
                                     }-*/;

    public void remove(T value) {
        final int index = indexOf(value);
        if (index != -1) {
            splice(index, 1);
        }
    }

    public void removeByIndex(int index) {
        splice(index, 1);
    }

    public native void set(int index, T value) /*-{
                                               this[index] = value;
                                               }-*/;

    public native void setLength(int newLength) /*-{
                                                this.length = newLength;
                                                }-*/;

    public native T shift() /*-{
                            return this.shift();
                            }-*/;

    public native void sort(CanCompare<T> comparator) /*-{
                                                      this.sort(function(a, b) {
                                                      return comparator.@elemental.util.CanCompare::compare(Ljava/lang/Object;Ljava/lang/Object;)(a, b);
                                                      });
                                                      }-*/;

    public JsArrayOf<T> splice(int index, int count) {
        return splice(this, index, count);
    }

    public native void unshift(T value) /*-{
                                        this.unshift(value);
                                        }-*/;
}