com.buzzcoders.yasw.widgets.map.support.GMapUtils.java Source code

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Here is the source code for com.buzzcoders.yasw.widgets.map.support.GMapUtils.java

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/*******************************************************************************
 * Copyright (c) 2014 Massimo Rabbi.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Massimo Rabbi <mrabbi@users.sourceforge.net> - initial API and implementation
 ******************************************************************************/
package com.buzzcoders.yasw.widgets.map.support;

import java.net.URLEncoder;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

import com.buzzcoders.yasw.widgets.map.core.Animation;
import com.buzzcoders.yasw.widgets.map.core.LatLng;
import com.buzzcoders.yasw.widgets.map.core.MarkerOptions;
import com.buzzcoders.yasw.widgets.map.ui.GMapsDetailsPanel;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * A bunch of utility methods to deal with the map component.
 * 
 * @author Massimo Rabbi (mrabbi@users.sourceforge.net)
 *
 */
public class GMapUtils {

    public static final int OPTIONS_LAT_INDEX = 0;
    public static final int OPTIONS_LNG_INDEX = 1;
    public static final int OPTIONS_DRAGGABLE_INDEX = 2;
    public static final int OPTIONS_ANIMATION_INDEX = 3;
    public static final int OPTIONS_VISIBLE_INDEX = 4;
    public static final int OPTIONS_CLICKABLE_INDEX = 5;

    /**
     * Returns the marker options extracted from the specified arguments.
     * 
     * @param arguments the arguments containing the information
     * @return {@link MarkerOptions} instance
     */
    public static MarkerOptions getMarkerOptions(Object[] arguments) {
        MarkerOptions options = new MarkerOptions();
        // LatLng
        options.setPosition(
                new LatLng((Double) arguments[OPTIONS_LAT_INDEX], (Double) arguments[OPTIONS_LNG_INDEX]));
        // Draggable
        options.setDraggable((Boolean) arguments[OPTIONS_DRAGGABLE_INDEX]);
        // Animation
        options.setAnimation(getMarkerAnimation((Double) arguments[OPTIONS_ANIMATION_INDEX]));
        // Visible
        options.setVisible((Boolean) arguments[OPTIONS_VISIBLE_INDEX]);
        // Clickable
        options.setClickable((Boolean) arguments[OPTIONS_CLICKABLE_INDEX]);
        return options;
    }

    /**
     * Returns the position extracted from the specified arguments.
     * 
     * @param arguments the arguments containing the information
     * @return the latitude and longitude information
     */
    public static LatLng getPosition(Object[] arguments) {
        return new LatLng((Double) arguments[0], (Double) arguments[1]);
    }

    /**
     * Returns the type of animation given the specific value.
     * 
     * @param value value representing the marker animation
     * @return the animation type
     */
    public static Animation getMarkerAnimation(Double value) {
        if (value != null) {
            switch (value.intValue()) {
            case 1:
                // google.maps.Animation.BOUNCE   => 1
                return Animation.BOUNCE;
            case 2:
                // google.maps.Animation.DROP   => 2
                return Animation.DROP;
            default:
                return null;
            }
        }
        return null;
    }

    /**
     * Returns the coordinates of the specified address.
     * 
     * @param addressText the address to look
     * @return the latitude and longitude information
     */
    public static LatLng getAddressCoordinates(String addressText) {
        LatLng coordinates = null;
        GetMethod locateAddressGET = null;
        HttpClient client = null;
        try {
            String addressUrlEncoded = URLEncoder.encode(addressText, "UTF-8");
            String locationFindURL = "http://maps.google.com/maps/api/geocode/json?sensor=false&address="
                    + addressUrlEncoded;
            client = new HttpClient();
            locateAddressGET = new GetMethod(locationFindURL);
            int httpRetCode = client.executeMethod(locateAddressGET);
            if (httpRetCode == HttpStatus.SC_OK) {
                String responseBodyAsString = locateAddressGET.getResponseBodyAsString();
                ObjectMapper mapper = new ObjectMapper();
                mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
                mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true);
                mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
                JsonNode jsonRoot = mapper.readTree(responseBodyAsString);
                JsonNode location = jsonRoot.path("results").get(0).path("geometry").path("location");
                JsonNode lat = location.get("lat");
                JsonNode lng = location.get("lng");
                coordinates = new LatLng(lat.asDouble(), lng.asDouble());
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            if (locateAddressGET != null)
                locateAddressGET.releaseConnection();
            if (client != null)
                client.getState().clear();
        }
        return coordinates;
    }

    /**
     * Opens in a separate {@link Shell} the panel containing the Google Map
     * controls.
     */
    public static void openSample() {
        Display display = Display.getDefault();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());
        new GMapsDetailsPanel(shell, SWT.NONE);
        shell.open();
    }
}