com.moesol.gwt.maps.client.tms.TileMapServiceMetadata.java Source code

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Here is the source code for com.moesol.gwt.maps.client.tms.TileMapServiceMetadata.java

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/**
 * (c) Copyright, Moebius Solutions, Inc., 2012
 *
 *                        All Rights Reserved
 *
 * LICENSE: GPLv3
 */
package com.moesol.gwt.maps.client.tms;

import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.user.client.Window;
import com.google.gwt.xml.client.Document;
import com.google.gwt.xml.client.Element;
import com.google.gwt.xml.client.NodeList;
import com.google.gwt.xml.client.XMLParser;

public class TileMapServiceMetadata {
    public interface RequestCallback {
        void onSuccess(TileMapServiceMetadata metadata);
    }

    private String url;
    private TileMapMetadata[] tileMaps;

    public void setTileMaps(TileMapMetadata[] tileMaps) {
        this.tileMaps = tileMaps;
    }

    public TileMapMetadata[] getTileMaps() {
        return tileMaps;
    }

    public static TileMapServiceMetadata parse(String xml) {
        TileMapServiceMetadata metadata = new TileMapServiceMetadata();

        Document doc = XMLParser.parse(xml);
        NodeList tileMapEls = doc.getElementsByTagName("TileMap");
        if (tileMapEls != null && tileMapEls.getLength() != 0) {
            TileMapMetadata[] tileMaps = new TileMapMetadata[tileMapEls.getLength()];
            for (int i = 0; i < tileMapEls.getLength(); i++) {
                tileMaps[i] = TileMapMetadata.parse((Element) tileMapEls.item(i));
            }
            metadata.setTileMaps(tileMaps);
        }

        return metadata;
    }

    public TileMapMetadata findTileMapMetadata(String tileId) {
        for (int i = 0; i < tileMaps.length; i++) {
            TileMapMetadata tileMapMetadata = tileMaps[i];
            if (tileMapMetadata.getId().equals(tileId)) {
                return tileMapMetadata;
            }
        }
        return null;
    }

    public static void getMetadata(String url, final RequestCallback requestCallback) {
        RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, url);
        requestBuilder.setHeader("Accept", "text/xml");
        try {
            requestBuilder.sendRequest(null, new com.google.gwt.http.client.RequestCallback() {
                @Override
                public void onError(Request request, Throwable exception) {
                    // TODO: do something more useful here
                    Window.alert("error in TileMapServiceMetadata.getMetadata");
                }

                @Override
                public void onResponseReceived(Request request, com.google.gwt.http.client.Response response) {
                    // TODO: need to check to see if this response was actually a
                    // 200
                    String responseText = response.getText();
                    requestCallback.onSuccess(parse(responseText));
                }
            });
        } catch (RequestException e) {
            // TODO: do something more useful here
            e.printStackTrace();
        }
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getUrl() {
        return url;
    }
}