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OpenGL vector map library written in Java - running on Android, iOS, Desktop and within the browser.

There is a newer version: 0.20.0

package org.oscim.tiling.source.geojson;

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

import java.util.AbstractCollection;
import java.util.Iterator;

/**
 * a Java Friendly way of working with Js Arrays using the Java.util.Collection
 * API
 * https://groups.google.com/forum/#!topic/google-web-toolkit/_8X9WPL6qwM
 *
 * @param 
 * @author sg
 */
public class JsArrayCollection extends AbstractCollection {

    private JsArr _data;

    /**
     * creates an empty array
     */
    public JsArrayCollection() {
        _data = JsArr.create().cast();
    }

    /**
     * creates JsArrayCollection wrapping an existing js array
     */
    public JsArrayCollection(JavaScriptObject data) {
        this._data = data.cast();
    }

    public static  JsArrayCollection create(JavaScriptObject data) {
        return new JsArrayCollection(data);
    }

    @Override
    public Iterator iterator() {
        return new JsArrayIterator(this);
    }

    @Override
    public int size() {
        return _data.size();
    }

    public static class JsArrayIterator implements Iterator {

        private JsArrayCollection arr;
        int currentIndex;

        public JsArrayIterator(JsArrayCollection arr) {
            this.arr = arr;
            currentIndex = 0;
        }

        @Override
        public boolean hasNext() {
            //        System.out.println(currentIndex+" - "+arr.size());
            return currentIndex < arr.size();
        }

        @Override
        public T next() {
            currentIndex++;
            return arr._data.get(currentIndex - 1);
        }

        @Override
        public void remove() {
            arr._data.slice(currentIndex - 1, currentIndex);
        }

    }

    /**
     * untyped array
     */
    private static class JsArr extends JavaScriptObject {
        protected JsArr() {
        }

        public final native JsArr slice(int start, int end)/*-{
            return this.slice(start, end);
        }-*/;

        public static final native  JsArr create() /*-{
            return [];
        }-*/;

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

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

}