AASRequester.java :  » UnTagged » andnav » org » andnav2 » sys » ors » aas » Android Open Source

// Created by plusminus on 18:22:30 - 05.11.2008
package org.andnav2.sys.ors.aas;

import java.io.BufferedInputStream;
import java.io.IOException;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import junit.framework.Assert;

import org.andnav2.osm.adt.GeoPoint;
import org.andnav2.sys.ors.exceptions.ORSException;
import org.andnav2.util.constants.Constants;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;


public class AASRequester implements Constants{
  // ===========================================================
  // Constants
  // ===========================================================

  public static final int AAS_MAXMINUTES = 60;

  private static final String URL_AAS_EUROPE = "http://data.giub.uni-bonn.de/openrouteservice/php/AAS_AccessibilityRequest.php";

  // ===========================================================
  // Fields
  // ===========================================================

  // ===========================================================
  // Constructors
  // ===========================================================

  // ===========================================================
  // Getter & Setter
  // ===========================================================

  // ===========================================================
  // Methods from SuperClass/Interfaces
  // ===========================================================

  // ===========================================================
  // Methods
  // ===========================================================

  /**
   * @param gp
   * @param pMinutes
   * @throws SAXException
   * @throws ORSException
   */
  public static AASResponse request(final GeoPoint gp, final int pMinutes) throws IOException, SAXException, ORSException {
    Assert.assertNotNull(gp);
    if(pMinutes < 1 || pMinutes > AAS_MAXMINUTES) {
      throw new IllegalArgumentException("pMinutes must be between: 1 and " + AAS_MAXMINUTES);
    }

    final String url = URL_AAS_EUROPE;
    final HttpClient httpClient = new DefaultHttpClient();
    //      httpClient.getParams().setParameter("http.socket.timeout", new Integer(1200000)); // 2min

    final HttpPost request = new HttpPost(url);

    // create the multipart request and add the parts to it
    final MultipartEntity requestEntity = AASRequestComposer.create(gp, pMinutes);

    request.setEntity(requestEntity);

    final HttpResponse response = httpClient.execute(request);
    final int status = response.getStatusLine().getStatusCode();

    if (status != HttpStatus.SC_OK) {
      throw new IOException();
    } else {
      { // DEBUG
        //              final Reader r = new InputStreamReader(new BufferedInputStream(response.getEntity().getContent()));
        //              // see above
        //              final char[] buf = new char[32 * 1024];
        //              int read;
        //              final StringBuilder sb = new StringBuilder();
        //              while((read = r.read(buf)) != -1)
        //                   sb.append(buf, 0, read);
        //
        //              Log.d(DEBUGTAG, sb.toString().replace('\n', ' '));
        //            return null;
      }

      /* Get a SAXParser from the SAXPArserFactory. */
      final SAXParserFactory spf = SAXParserFactory.newInstance();
      SAXParser sp;
      try {
        sp = spf.newSAXParser();
      } catch (final ParserConfigurationException e) {
        throw new SAXException(e);
      }

      /* Get the XMLReader of the SAXParser we created. */
      final XMLReader xr = sp.getXMLReader();
      /* Create a new ContentHandler and apply it to the XML-Reader*/
      final AASParser aasParser = new AASParser();
      xr.setContentHandler(aasParser);

      /* Parse the xml-data from our URL. */
      xr.parse(new InputSource(new BufferedInputStream(response.getEntity().getContent())));

      /* The Handler now provides the parsed data to us. */
      return aasParser.getASSResponse();
    }
  }

  // ===========================================================
  // Inner and Anonymous Classes
  // ===========================================================
}