Application: gvSIG desktop

/* gvSIG. Sistema de Informaci�n Geogr�fica de la Generalitat Valenciana

*

* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

*

* This program is free software; you can redistribute it and/or

* modify it under the terms of the GNU General Public License

* as published by the Free Software Foundation; either version 2

* of the License, or (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program; if not, write to the Free Software

* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

*

* For more information, contact:

*

*  Generalitat Valenciana

*   Conselleria d'Infraestructures i Transport

*   Av. Blasco Ib��ez, 50

*   46010 VALENCIA

*   SPAIN

*

*      +34 963862235

*   gvsig@gva.es

*      www.gvsig.gva.es

*

*    or

*

*   IVER T.I. S.A

*   Salamanca 50

*   46005 Valencia

*   Spain

*

*   +34 963163400

*   dac@iver.es

*/

package es.gva.cit.catalogClient;

import es.gva.cit.catalogClient.csw.drivers.CSWCatalogServiceDriver;

import es.gva.cit.catalogClient.drivers.ICatalogServiceDriver;

import es.gva.cit.catalogClient.metadataXML.XMLNode;

import es.gva.cit.catalogClient.srw.drivers.SRWCatalogServiceDriver;

import es.gva.cit.catalogClient.utils.comboServer.ServerData;

import es.gva.cit.catalogClient.z3950.drivers.Z3950CatalogServiceDriver;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.Socket;

import java.net.URL;

import java.net.UnknownHostException;

/**

 * This class represents a catalogClient. It must be created to

 * use the catalog service

 * 

 * @author Jorge Piera Llodra (piera_jor@gva.es)

 */

public class CatalogClient {

    private URL url = null;

    private String sURL = null;

    private String protocol = null;

    private ICatalogServiceDriver lnkICatalogServerDriver;

    private String serverStatus = null;

    /**

     * Constructor

     * @param url

     * Server url

     * @param protocol

     * Server protocol

     * @param database

     * Database name. This param only is used when the protocol

     * is z39.50

     */

    public CatalogClient(String url, String protocol, String database) {

        setProtocol(protocol);

        setSURL(url);

        //This is necessary. Otherwise it will throw the exception

        if (!(url.regionMatches(0, "http://", 0, 7))) {

            url = "http://" + url;

        }

        try {

            this.setUrl(new URL(url));

            //if protocol is z39.50 we have to add the database to the URL

            if (!(protocol.equals(new String(ServerData.SERVER_SUBTYPE_CATALOG_Z3950)))) {

                database = getUrl().getPath();

            }

            //if protocol is http, we have to set the port manually

            if (getUrl().getPort() == -1) {

                setUrl(new URL("http", getUrl().getHost(), 80, database));

            } else {

                setUrl(new URL("http", getUrl().getHost(), getUrl().getPort(),

                        database));

            }

        } catch (MalformedURLException e) {

            // TODO Auto-generated catch block

            System.out.println("La URL no es correcta");

        }

        //Casting to the respective driver

        if (protocol.equals(new String(ServerData.SERVER_SUBTYPE_CATALOG_SRW))) {

            lnkICatalogServerDriver = new SRWCatalogServiceDriver();

        }

        if (protocol.equals(new String(ServerData.SERVER_SUBTYPE_CATALOG_CSW))) {

            lnkICatalogServerDriver = new CSWCatalogServiceDriver();

        }

        if (protocol.equals(new String(ServerData.SERVER_SUBTYPE_CATALOG_Z3950))) {

            lnkICatalogServerDriver = new Z3950CatalogServiceDriver();

        }

    }

    /**

     * This function is a link between the user interface and

     * the driver. It tryes if the server exists, if the server 

     * supports the protocolo and finally it sents a getCapabilities

     * request.   

     * @return

     * True if all is OK.

     */

    public boolean getCapabilities(){

        //try to connect

        if (!serverReady()) {

            serverStatus = ("errorServerNotFound");

        } else if (!getLnkICatalogServerDriver().isProtocolSupported(getUrl())) {

            serverStatus = "errorNotSupportedProtocol";

        } else {

            //getCapabilities

            XMLNode[] nodesCapabilities = getLnkICatalogServerDriver()

                                              .getCapabilities(getUrl());

            if (nodesCapabilities == null) {

                serverStatus = "errorNotSupportedCapabilities";

            } else {

                //Configure the client

                if (!getLnkICatalogServerDriver().setParameters(nodesCapabilities,getUrl())) {

                    if (!(getLnkICatalogServerDriver()

                                     .getServerAnswerReady().equals(""))) {

                        serverStatus = getLnkICatalogServerDriver().getServerAnswerReady();

                    } else {

                        serverStatus = "errorNotParsedReply";

                    }

                } else {

                    //Show the answer

                    serverStatus = getLnkICatalogServerDriver().getServerAnswerReady();

                    return true;

                }

            }

        }

        return false;

    }

    /**

     * @return Returns the lnkICatalogServerDriver.

     */

    public ICatalogServiceDriver getLnkICatalogServerDriver() {

        return lnkICatalogServerDriver;

    }

    /**

     * @param lnkICatalogServerDriver The lnkICatalogServerDriver to set.

     */

    public void setLnkICatalogServerDriver(

        ICatalogServiceDriver lnkICatalogServerDriver) {

        this.lnkICatalogServerDriver = lnkICatalogServerDriver;

    }

    /**

     * @return Returns the protocol.

     */

    public String getProtocol() {

        return protocol;

    }

    /**

     * @param protocol The protocol to set.

     */

    public void setProtocol(String protocol) {

        this.protocol = protocol;

    }

    /**

     * @return Returns the url.

     */

    public URL getUrl() {

        return url;

    }

    /**

     * @return Returns the sUrl.

     */

    public String getSUrl(){

        return sURL;

    }

    /**

     * @param url The url to set.

     */

    public void setUrl(URL url) {

        this.url = url;

    }

    /**

     *  It tries if the server is ready

     * @return boolean

     *   true --> server is ready

     *   false --> server is not ready

     */

    private boolean serverReady() {

        try {

            new Socket(this.getUrl().getHost(),this.getUrl().getPort());

        } catch (UnknownHostException e) {

            // TODO Auto-generated catch block

            return false;

        } catch (IOException e) {

            // TODO Auto-generated catch block

            return false;

        }

        return true;

    }

    /**

     * @return Returns the sURL.

     */

    public String getSURL() {

        return sURL;

    }

    /**

     * @param surl The sURL to set.

     */

    public void setSURL(String surl) {

        sURL = surl;

    }

    /**

     * @return Returns the serverStatus.

     */

    public String getServerStatus() {

        return serverStatus;

    }

}