JsArrays.java

/*
 * Copyright 2009 Thomas Broyer
 * Copyright 2014 Grow Bit
 *
 * 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 org.turbogwt.core.collections;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsArray;
import com.google.gwt.core.client.JsArrayBoolean;
import com.google.gwt.core.client.JsArrayInteger;
import com.google.gwt.core.client.JsArrayNumber;
import com.google.gwt.core.client.JsArrayString;

/**
 * Many utility methods for dealing with JsArrays.
 *
 * @author Thomas Broyer
 */
public final class JsArrays {

    private JsArrays() {
    }

    public static JsArrayString fromArray(String... values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            JsArrayString ret = JavaScriptObject.createArray().cast();
            for (int i = 0, l = values.length; i < l; i++) {
                ret.set(i, values[i]);
            }
            return ret;
        }
    }

    public static String[] toArray(JsArrayString values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            int length = values.length();
            String[] ret = new String[length];
            for (int i = 0, l = length; i < l; i++) {
                ret[i] = values.get(i);
            }
            return ret;
        }
    }

    public static JsArrayBoolean fromArray(boolean... values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            JsArrayBoolean ret = JavaScriptObject.createArray().cast();
            for (int i = 0, l = values.length; i < l; i++) {
                ret.set(i, values[i]);
            }
            return ret;
        }
    }

    public static boolean[] toArray(JsArrayBoolean values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            int length = values.length();
            boolean[] ret = new boolean[length];
            for (int i = 0, l = length; i < l; i++) {
                ret[i] = values.get(i);
            }
            return ret;
        }
    }

    public static JsArrayInteger fromArray(int... values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            JsArrayInteger ret = JavaScriptObject.createArray().cast();
            for (int i = 0, l = values.length; i < l; i++) {
                ret.set(i, values[i]);
            }
            return ret;
        }
    }

    public static int[] toArray(JsArrayInteger values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            int length = values.length();
            int[] ret = new int[length];
            for (int i = 0, l = length; i < l; i++) {
                ret[i] = values.get(i);
            }
            return ret;
        }
    }

    public static JsArrayNumber fromArray(double... values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            JsArrayNumber ret = JavaScriptObject.createArray().cast();
            for (int i = 0, l = values.length; i < l; i++) {
                ret.set(i, values[i]);
            }
            return ret;
        }
    }

    public static double[] toArray(JsArrayNumber values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            int length = values.length();
            double[] ret = new double[length];
            for (int i = 0, l = length; i < l; i++) {
                ret[i] = values.get(i);
            }
            return ret;
        }
    }

    public static <T extends JavaScriptObject> JsArray<T> fromArray(T... values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            JsArray<T> ret = JavaScriptObject.createArray().cast();
            for (int i = 0, l = values.length; i < l; i++) {
                ret.set(i, values[i]);
            }
            return ret;
        }
    }

    public static <T extends JavaScriptObject> T[] toArray(JsArray<? extends T> values) {
        if (GWT.isScript()) {
            return reinterpretCast(values);
        } else {
            int length = values.length();
            @SuppressWarnings("unchecked")
            T[] ret = (T[]) new JavaScriptObject[length];
            for (int i = 0, l = length; i < l; i++) {
                ret[i] = values.get(i);
            }
            return ret;
        }
    }

    private static native JsArrayString reinterpretCast(String[] value) /*-{
        return value;
    }-*/;

    private static native String[] reinterpretCast(JsArrayString value) /*-{
        return value;
    }-*/;

    private static native JsArrayBoolean reinterpretCast(boolean[] value) /*-{
        return value;
    }-*/;

    private static native boolean[] reinterpretCast(JsArrayBoolean value) /*-{
        return value;
    }-*/;

    private static native JsArrayInteger reinterpretCast(int[] value) /*-{
        return value;
    }-*/;

    private static native int[] reinterpretCast(JsArrayInteger value) /*-{
        return value;
    }-*/;

    private static native JsArrayNumber reinterpretCast(double[] value) /*-{
        return value;
    }-*/;

    private static native double[] reinterpretCast(JsArrayNumber value) /*-{
        return value;
    }-*/;

    private static native <T extends JavaScriptObject> JsArray<T> reinterpretCast(T[] value) /*-{
        return value;
    }-*/;

    private static native <T extends JavaScriptObject> T[] reinterpretCast(JsArray<T> value) /*-{
        return value;
    }-*/;
}