| gvSIG desktop 1

package org.gvsig.remoteClient.wms;

import java.io.BufferedOutputStream;

import java.io.DataOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.URL;

import java.util.TreeMap;

import java.util.Vector;

/**

 * <p> Abstract class that represents handlers to comunicate via WMS protocol.

 * </p>

 * 

 */

public abstract class WMSProtocolHandler {

        // procotol handler name

    protected String name;

    // protocol handler version

    protected String version;

    //host of the WMS to conenct

    protected String host;

    // port number of the comunication channel of the WMS to connect

    protected String port;    

    //WMS metadata

    protected ServiceInformation serviceInfo;

    public TreeMap layers;

    public Vector srs;

    // abstract methods to implement by the handlers that implement

    // the connection to a WMS with certain version.

    //    public abstract String getName();   

    //    public abstract String getVersion();

    /**

     * parses the data retrieved by the WMS in XML format. 

     * It will be mostly the WMS Capabilities, but the implementation

     * will be placed in the handler implementing certain version of the protocol.

     * 

     */

    public abstract void parse(File f);

    public String getName() {        

            return name;

    } 

    public String getVersion() {        

            return version;

    }    

    public ServiceInformation getServiceInformation() {        

        return serviceInfo;

    }  

    public String getHost ()

    {

            return host;

    }

    public void setHost(String _host)

    {

            host = _host;

    }

    public String getPort()

    {

            return port;

    }

    public void setPort(String _port)

    {

            port = _port;

    }

    /**

     * <p>Builds a GetMap request that is sent to the WMS

     * the response (image) will be redirect to the

     * WMS client</p>

     */

    public byte[] getMap(WMSStatus status) {        

        return null;

    } 

        /**

         * <p>Builds a GetCapabilities request that is sent to the WMS

         * the response will be parse to extract the data needed by the

         * WMS client</p>

         */

    public void getCapabilities()

    {                

            URL request = null;

                try

                {

                        request = new URL(buildCapabilitiesRequest());

                }

                catch(Exception e)

                {

                        // TODO something about the exceptionsssss....!!!

                }

                   File f = null;

                   f = new File("tochangethis.txt");

            if (!f.exists())

            {

                    try

                    {

                            DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(f)));

                            byte[] buffer = new byte[1024*256];

                            InputStream is = request.openStream();

                            long readed = 0;

                            for (int i = is.read(buffer); i>0; i = is.read(buffer)){

                                    dos.write(buffer, 0, i);

                                    readed += i;

                            }

                            dos.close();

                    }

                    catch(Exception e)

                    {}

            }

            parse(f);

            //return parse(f);

    }

/**

 * <p>It will send a GetFeatureInfo request to the WMS

 * Parsing the response and redirecting the info to the WMS client</p>

 */

    public String getFeatureInfo()

    {

            return null;

    }

    /**

     * Builds the GetCapabilitiesRequest according to the OGC WMS Specifications

     */

    private String buildCapabilitiesRequest()

    {

                String req = new String();

                req = req + getHost() + "REQUEST=GetCapabilities&SERVICE=WMS&";

                req = req + "VERSION=" + getVersion();

                req += ("&EXCEPTIONS=XML");

                return req;

    }

    /**

     * Builds the GetMapRequest according to the OGC WMS Specifications

     */

    private String buildMapRequest(WMSStatus status)

    {

                String req = new String();

                req = req + getHost() + "REQUEST=GetMap&SERVICE=WMS&";

                req = req + "VERSION=" + getVersion() + "&";

                req = req + getPartialQuery(status);

       if (status.getExceptionFormat() != null) {

            req += ("&EXCEPTIONS=" + status.getExceptionFormat());

        } else {

            req += ("&EXCEPTIONS=XML");

        }

                return req;

    }

    /**

     * Gets the part of the OGC request that share GetMap and GetFeatureInfo

     * @return String request

     */

    public String getPartialQuery(WMSStatus status)

    {

        String req = "LAYERS=" + status.getLayerNames() + "&STYLES=" +

                                status.getStyles() + "&SRS=" + status.getSrs() +

            "&BBOX=" + status.getExtent() + "&WIDTH=" + status.getWidth() +

            "&HEIGHT=" + status.getHeight() + "&FORMAT=" + status.getFormat();

//        if (status.getTransparency()) {

//            req += "&TRANSPARENT=TRUE";

//        }

//

//        if (status.getBGColor() != null) {

//            req += ("&COLOR=" + status.getBGColor());

//        }

//

//        if (time != null) {

//            req += ("&TIME=" + time);

//        }

//

//        if (elevation != -1) {

//            req += ("&ELEVATION=" + elevation);

//        }

        return req.replaceAll(" ", "%20");

    }

    public void close() {        

        // your code here

    } 

    /**

     * Inner class that represents the description of the WMS metadata.

     * The first part of the capabilities will return the service information

     * from the WMS, this class will hold this information. 

     * 

     */

    public class ServiceInformation {

        public String online_resource;

        public String version;

        public String name;

        public String scope;

        public String title;

        public String abstr;

        public String keywords;

        public String fees;

        public String operationsInfo;

        public String personname;

        public String organization;

        public String function;

        public String addresstype;

        public String address;

        public String place;

        public String province;

        public String postcode;

        public String country;

        public String phone;

        public String fax;

        public String email;

        public Vector formats;

        public ServiceInformation()

        {

                online_resource = new String();

            version = new String();

            name = new String();

            scope = new String();

            title = new String();

            abstr = new String();

            keywords = new String();

            fees = new String();

            operationsInfo = new String();

            personname = new String();

            organization = new String();

            function = new String();

            addresstype = new String();

            address = new String();

            place = new String();

            province = new String();

            postcode = new String();

            country = new String();

            phone = new String();

            fax = new String();

            email = new String();

            formats = new Vector();               

        }

     }    

 }