/*
* Copyright 2008 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 com.google.maps.gwt.client;
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;
/**
* Convenience methods for working with GWT JsArrays.
*
* @author dcarlson@google.com (David Carlson)
*/
public class ArrayHelper {
/**
* Takes an array of Integers to be interpreted as bytes and returns a Java
* Array of the byte primitive type.
*
* @param bytes a JavaScript array to return.
*/
public static byte[] toJavaArrayBytes(JsArrayInteger bytes) {
int length = bytes.length();
byte[] ret = new byte[length];
for (int i = 0; i < length; i++) {
ret[i] = (byte) bytes.get(i);
}
return ret;
}
public static <J extends JavaScriptObject> JsArray<J> toJsArray(J... objects) {
JsArray<J> result = JsArray.createArray().cast();
for (int i = 0; i < objects.length; i++) {
result.set(i, objects[i]);
}
nativePatchConstructorForSafari(result);
return result;
}
/**
* Converts a Java array of booleans to a JavaScript boolean array.
*
* @param bits array of booleans to convert.
*/
public static JsArrayBoolean toJsArrayBoolean(boolean... bits) {
JsArrayBoolean result = JsArrayBoolean.createArray().cast();
for (int i = 0; i < bits.length; i++) {
result.set(i, bits[i]);
}
nativePatchConstructorForSafari(result);
return result;
}
/**
* Converts Java integer array to JavaScript integer array.
*
* @param integers array of integers to convert.
*/
public static JsArrayInteger toJsArrayInteger(int... integers) {
JsArrayInteger result = JsArrayInteger.createArray().cast();
for (int i = 0; i < integers.length; i++) {
result.set(i, integers[i]);
}
nativePatchConstructorForSafari(result);
return result;
}
/**
* Converts a Java array of doubles to a JavaScript number array.
*
* @param numbers array of doubles to convert.
*/
public static JsArrayNumber toJsArrayNumber(double... numbers) {
JsArrayNumber result = JsArrayNumber.createArray().cast();
for (int i = 0; i < numbers.length; i++) {
result.set(i, numbers[i]);
}
nativePatchConstructorForSafari(result);
return result;
}
/**
* Converts an array of Java strings to an array of JavaScript strings.
*
* @param strings array of strings to convert
*/
public static JsArrayString toJsArrayString(String... strings) {
JsArrayString result = JsArrayString.createArray().cast();
for (int i = 0; i < strings.length; i++) {
result.set(i, strings[i]);
}
nativePatchConstructorForSafari(result);
return result;
}
/**
* This is a fixup for the constructor used to address issue 219 - Safari bug
* in comparing Date & Array constructors.
*
* @param result
*/
private static native void nativePatchConstructorForSafari(
JavaScriptObject result) /*-{
result.constructor = $wnd.Array;
}-*/;
}