HttpServletModel.java :  » Google-tech » kmlframework » org » boehn » kmlframework » todo » servlet » Java Open Source

package org.boehn.kmlframework.todo.servlet;

import java.io.IOException;
import java.util.StringTokenizer;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

//import org.boehn.kmlframework.KmlDocumentElement;
import org.boehn.kmlframework.kml.Kml;
import org.boehn.kmlframework.kml.KmlException;
import org.boehn.kmlframework.todo.BoundingBox;
//import org.boehn.kmlframework.todo.ViewPosition;
//import org.boehn.kmlframework.todo.style.Style;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class HttpServletModel extends Kml {

  private NetworkLinkControl networkLinkControl;
  private String baseUrl;
  private HttpServletRequest request;
  private HttpServletResponse response;
  private String sessionId;
  
  public boolean DISABLEHTTPCACHE = true;

  public HttpServletModel(HttpServletRequest request, HttpServletResponse response) {
    this(request, response, true);
  }
  
  public HttpServletModel(HttpServletRequest request, HttpServletResponse response, boolean handleTransactions) {
    this.request = request;
    this.response = response;
    if (handleTransactions) {
      networkLinkControl = new NetworkLinkControl();
      networkLinkControl.setCookie("jsessionid=" + request.getSession().getId());
    }
  }
  

  /*public NetworkLinkControl getNetworkLinkControl() {
    return networkLinkControl;
  }*/

  public void setNetworkLinkControl(NetworkLinkControl networkLinkControl) {
    this.networkLinkControl = networkLinkControl;
  }
  
  public String getBaseUrl() {
    if (baseUrl != null) {
      return baseUrl;
    } else {
      return "http://" + request.getLocalName() + ":" + request.getLocalPort() + request.getContextPath();
    }
  }
  /*
  @Override
  public Observer getObserver() {
    if (super.getObserver() == null && request != null) {
      try {
        // We try to read the parameters from the http get
        StringTokenizer parameters = new StringTokenizer(request.getParameter("gefObserver"), ",");  
        
        BoundingBox boundingBox = new BoundingBox(Double.parseDouble(parameters.nextToken().replace(' ', '+')), Double.parseDouble(parameters.nextToken().replace(' ', '+')), Double.parseDouble(parameters.nextToken().replace(' ', '+')), Double.parseDouble(parameters.nextToken().replace(' ', '+'))); 
        ViewPosition viewPosition = new ViewPosition(Double.parseDouble(parameters.nextToken().replace(' ', '+')), Double.parseDouble(parameters.nextToken().replace(' ', '+')), Double.parseDouble(parameters.nextToken().replace(' ', '+')), Double.parseDouble(parameters.nextToken().replace(' ', '+')), Double.parseDouble(parameters.nextToken().replace(' ', '+')));
        setObserver(new Observer(boundingBox, viewPosition));
      } catch (Exception e) {
        //log.warn("Could not create observer because of missing information in the http get.");
      }
    }
    return super.getObserver();
  }

  public void setBaseUrl(String baseUrl) {
    this.baseUrl = baseUrl;
  }

  public HttpServletRequest getRequest() {
    return request;
  }

  public void setRequest(HttpServletRequest request) {
    this.request = request;
    setObserver(null);
  }*/

  public HttpServletResponse getResponse() {
    return response;
  }

  public void setResponse(HttpServletResponse response) {
    this.response = response;
  }

  public String getSessionId() {
    return sessionId;
  }

  public void setSessionId(String sessionId) {
    this.sessionId = sessionId;
  }

  /*@Override
  public Document generateXmlDocument() throws KmlException {
    Document xmlDocument;
    try {
      xmlDocument = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
    } catch (ParserConfigurationException e) {
      throw new  KmlException(e);
    }
    
    Element kmlElement = xmlDocument.createElement("kml");
    kmlElement.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns", "http://earth.google.com/kml/2.0");
    xmlDocument.appendChild(kmlElement);

    if (networkLinkControl != null) {
      networkLinkControl.addKml(kmlElement, this, xmlDocument);
    }
  
    Element documentElement = xmlDocument.createElement("Document");
    kmlElement.appendChild(documentElement);
    
    if (getStyles() != null) {
      for (Style style: getStyles().values()) {
        style.addKml(documentElement, this, xmlDocument);
      }
    }
    if (getKmlDocumentElements() != null) {
      for (KmlDocumentElement modelElement: getKmlDocumentElements())
      modelElement.addKml(documentElement, this, xmlDocument);
    }
    
    return xmlDocument;
  }*/

  public void write() throws KmlException, IOException {
    response.setContentType("text/html");
    
    if (DISABLEHTTPCACHE) {
      response.setHeader("Cache-Control","no-cache"); //HTTP 1.1
      response.setHeader("Pragma","no-cache");        //HTTP 1.0
      response.setDateHeader ("Expires", 0);
    }
    
    ServletOutputStream out = response.getOutputStream();
    //this.write(out);
    out.close();
  }
  
}