Application: gvSIG desktop » gvSIG tools: Catalog

/* 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 org.gvsig.catalog.protocols;

import java.io.File;

import java.net.URL;

import java.util.Collection;

import org.apache.commons.httpclient.NameValuePair;

import org.gvsig.catalog.metadataxml.XMLTree;

import org.gvsig.remoteclient.utils.Utilities;

/**

 * 

 * 

 * 

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

 */

public class HTTPGetProtocol implements IProtocols {

        /**

         * 

         * 

         * 

         * @return 

         * @param url 

         * @param object 

         * @param firstRecord 

         */

        public Collection doQuery(URL url, Object object, int firstRecord) {        

                NameValuePair[] parameters = (NameValuePair[]) object;

                File file = null;

                String sUrl = "http://" + url.getHost() + ":" +

                url.getPort() + url.getPath();

                sUrl = sUrl + createURLParams(parameters);

                try {        

                        file = Utilities.downloadFile(new URL(sUrl),

                                        "catalog-", null);

                } catch (Exception e) {

                        return null;

                }

                Collection col = new java.util.ArrayList();

                col.add(XMLTree.xmlToTree(file));

                return col;

        } 

        /**

         * Create and string for a list of params

         * @param params

         * @return

         */

        private String createURLParams(NameValuePair[] params){

                StringBuffer buffer = new StringBuffer();

                for (int i=0 ; i<params.length ; i++){

                        if (i==0){

                                buffer.append("?");

                        }else{

                                buffer.append("&");

                        }

                        buffer.append(params[i].getName());

                        buffer.append("=");

                        buffer.append(params[i].getValue());

                }

                return buffer.toString();

        }

}