de.schneider.dev.poi.service.OpenStreetMapGeoService.java Source code

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Here is the source code for de.schneider.dev.poi.service.OpenStreetMapGeoService.java

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/**
 * Copyright (c) 2011, Sebastian Schneider
 *
 * 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 de.schneider.dev.poi.service;

import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.codec.EncoderException;
import org.apache.commons.codec.net.URLCodec;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Service to provide access to Nominatim which is the Geolocation API of
 * OpenStreetMap http://wiki.openstreetmap.org/wiki/Nominatim
 * 
 * @author Sebastian Schneider
 * 
 */
public class OpenStreetMapGeoService {

    private static Logger LOG = LoggerFactory.getLogger(OpenStreetMapGeoService.class);

    private final String URI_String = "http://nominatim.openstreetmap.org/search?q=";

    public void getGeoCoordinate(String location) throws EncoderException {

        LOG.info("Start GeoCoordination OpenStreetMap");

        // create default HttpClient
        HttpClient httpClient = new DefaultHttpClient();

        // get data from URI
        URLCodec urlCodec = new URLCodec("UTF-8");
        HttpGet httpGet = new HttpGet(URI_String + urlCodec.encode(location) + "&format=json");
        LOG.info("HttpGet: " + httpGet);
        LOG.debug(httpGet.toString());
        LOG.debug("HttpGetURI: " + httpGet.getURI());

        // get response
        try {
            HttpResponse httpResponse = httpClient.execute(httpGet);
            LOG.info("HttpResponse: " + httpResponse);
            LOG.info("Status Code: " + httpResponse.getStatusLine().getStatusCode());
            LOG.info("Status Phrase: " + httpResponse.getStatusLine().getReasonPhrase());

            HttpEntity httpEntity = httpResponse.getEntity();
            LOG.info("HttpEntity: " + httpEntity);
            LOG.info("HttpEntity Streaming: " + httpEntity.isStreaming());
            if (httpEntity.isStreaming()) {
                InputStream inputStream = httpEntity.getContent();
                String content = EntityUtils.toString(httpEntity);
                LOG.info(content);
                inputStream.close();
            }

        } catch (ClientProtocolException cpe) {
            LOG.error(cpe.getMessage());
        } catch (IOException ioe) {
            LOG.error(ioe.getMessage());
        }
    }
}