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| package photospace.space; |
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| |
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| import javax.servlet.http.*; |
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| import org.apache.commons.httpclient.*; |
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| import org.apache.commons.httpclient.methods.*; |
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| import org.apache.commons.lang.*; |
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| import org.apache.commons.logging.*; |
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| import com.hp.hpl.jena.rdf.model.*; |
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| import com.hp.hpl.jena.shared.*; |
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| import photospace.meta.rdf.*; |
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| |
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| |
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| |
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| public class Locator |
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| implements java.io.Serializable |
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| { |
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| private static final Log log = LogFactory.getLog(Locator.class); |
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| |
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| private static final String BASE_URL = "http://rpc.geocoder.us/service/rest?address="; |
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| |
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2
| public Position locate(String address) throws Exception
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| { |
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0
| if (StringUtils.isEmpty(address)) return null;
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| |
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2
| HttpClient client = new HttpClient();
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2
| GetMethod get = new GetMethod(BASE_URL);
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2
| get.setQueryString(new NameValuePair[] { new NameValuePair("address", address) } );
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2
| client.executeMethod(get);
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| |
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2
| if (HttpServletResponse.SC_OK != get.getStatusCode())
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| { |
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0
| log.warn(get.getURI() + " returned " + get.getStatusLine());
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0
| return null;
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| } |
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| |
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2
| log.debug(get.getURI() + " responded:\n" + get.getResponseBodyAsString());
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2
| Model rdf;
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2
| try
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| { |
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2
| rdf = ModelFactory.createDefaultModel();
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2
| rdf.read(get.getResponseBodyAsStream(), "");
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| } |
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| catch (JenaException e) |
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| { |
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1
| return null;
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| } |
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| |
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1
| Resource point = rdf.listSubjects().nextResource();
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1
| Position position = new Position();
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1
| if (point.hasProperty(GeoVocab.LAT)) position.setLatitude(new Double(point.getProperty(GeoVocab.LAT).getDouble()));
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1
| if (point.hasProperty(GeoVocab.LONG)) position.setLongitude(new Double(point.getProperty(GeoVocab.LONG).getDouble()));
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0
| if (point.hasProperty(GeoVocab.ALT)) position.setAltitude(new Double(point.getProperty(GeoVocab.ALT).getDouble()));
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1
| return position;
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| } |
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| } |
