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.srw.drivers;

import java.net.MalformedURLException;

import java.net.URI;

import java.net.URL;

import java.util.Collection;

import java.util.StringTokenizer;

import org.gvsig.catalog.drivers.AbstractCatalogServiceDriver;

import org.gvsig.catalog.drivers.CatalogCapabilities;

import org.gvsig.catalog.drivers.DiscoveryServiceCapabilities;

import org.gvsig.catalog.drivers.GetRecordsReply;

import org.gvsig.catalog.metadataxml.XMLNode;

import org.gvsig.catalog.metadataxml.XMLTree;

import org.gvsig.catalog.protocols.HTTPGetProtocol;

import org.gvsig.catalog.protocols.SOAPProtocol;

import org.gvsig.catalog.querys.CatalogQuery;

import org.gvsig.catalog.srw.parsers.SrwCapabilitiesParser;

import org.gvsig.utils.swing.jcomboServer.ServerData;

/**

 * This class implements the CSW protocol.

 * 

 * 

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

 * @see http://www.loc.gov/z3950/agency/zing/srw/

 */

public class SRWCatalogServiceDriver extends AbstractCatalogServiceDriver {

        private String version = "1.1";

        private String recordXPath;

        private String resultSetTTL;

        /*

         * (non-Javadoc)

         * @see es.gva.cit.catalogClient.drivers.ICatalogServiceDriver#getCapabilities(java.net.URI)

         */

        public DiscoveryServiceCapabilities getCapabilities(URI uri) {        

                URL url = null;

                try {

                        url = uri.toURL();

                } catch (MalformedURLException e) {

                        setServerAnswerReady("errorServerNotFound");

                        return null;

                }        

                SRWMessages messages = new SRWMessages(this);

                Collection nodes = new HTTPGetProtocol().doQuery(url,

                                messages.getHTTPGETCapabilities(true), 0);

                nodes = new SOAPProtocol().doQuery(url, messages.getSOAPCapabilities(), 0);

                new SrwCapabilitiesParser(this).parse((XMLNode)nodes.toArray()[0]);

                CatalogCapabilities capabilities = new CatalogCapabilities();

                capabilities.setVersion(version);

                capabilities.setServerMessage(getServerAnswerReady());

                return capabilities;

        } 

        /*

         * (non-Javadoc)

         * @see es.gva.cit.catalogClient.drivers.ICatalogServiceDriver#getRecords(java.net.URI, es.gva.cit.catalogClient.querys.Query, int)

         */

        public GetRecordsReply getRecords(URI uri, CatalogQuery query, int firstRecord) {        

                URL url = null;

                try {

                        url = uri.toURL();

                } catch (MalformedURLException e) {

                        setServerAnswerReady("errorServerNotFound");

                        return null;

                }        

                setQuery(query);

                SRWMessages messages = new SRWMessages(this);

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

                //TODO remove this comparation

                if (url.getHost().equals("idee.unizar.es")){

                        try {

                                url = new URL("http://idee.unizar.es/SRW/servlet/search/SRW");

                        } catch (MalformedURLException e) {

                                // It will never throws

                        }

                }

                XMLNode root = null;

                nodes = new SOAPProtocol().doQuery(url,

                                messages.getSOAPRecords(getQuery(), firstRecord), firstRecord);

                root = (XMLNode)nodes.toArray()[0];

                root = root.getSubNode(0).getSubNode(0);

                String prefix = new StringTokenizer(root.getName(), ":").nextToken();

                if (prefix.equals(root.getName())) {

                        prefix = "";

                } else {

                        prefix = prefix + ":";

                }        

                int numberOfRecords = getNumberOfRecords(root,

                                prefix + "numberOfRecords",

                                null);

                if (numberOfRecords == -1) {

                        return null;

                }   

                GetRecordsReply recordsReply = new GetRecordsReply(numberOfRecords);

                parseRecords(root,recordsReply,uri,prefix,numberOfRecords,firstRecord);                

                return recordsReply;

        } 

        /**

         * Parser the XML

         * @param node

         * @param recordsReply

         * @param uri

         * @param prefix

         * @param numberOfRecords

         * @param firstRecord

         */

        private void parseRecords(XMLNode node, GetRecordsReply recordsReply, URI uri, String prefix, int numberOfRecords, int firstRecord) {        

                XMLNode[] auxNodes = XMLTree.searchMultipleNode(node,

                                prefix + "records->" + prefix + "record");

                for (int i = 1;        (i <= numberOfRecords) && (i <= 10) &&        (i <= (numberOfRecords - firstRecord + 1)); i++){

                        recordsReply.addRecord(uri, auxNodes[i - 1]);

                }

        } 

        /**

         * 

         * 

         * 

         * @return Returns the recordXPath.

         */

        public String getRecordXPath() {        

                return recordXPath;

        } 

        /**

         * 

         * 

         * 

         * @param recordXPath The recordXPath to set.

         */

        public void setRecordXPath(String recordXPath) {        

                this.recordXPath = recordXPath;

        } 

        /**

         * 

         * 

         * 

         * @return Returns the resultSetTTL.

         */

        public String getResultSetTTL() {        

                return resultSetTTL;

        } 

        /**

         * 

         * 

         * 

         * @param resultSetTTL The resultSetTTL to set.

         */

        public void setResultSetTTL(String resultSetTTL) {        

                this.resultSetTTL = resultSetTTL;

        } 

        /**

         * 

         * 

         * 

         * @return Returns the version.

         */

        public String getVersion() {        

                return version;

        } 

        /**

         * 

         * 

         * 

         * @param version The version to set.

         */

        public void setVersion(String version) {        

                this.version = version;

        } 

        /*

         * (non-Javadoc)

         * @see es.gva.cit.catalogClient.drivers.ICatalogServiceDriver#isProtocolSupported(java.net.URI)

         */

        public boolean isProtocolSupported(URI uri) {        

                return SOAPProtocol.isProtocolSupported(null);

        } 

        /*

         * (non-Javadoc)

         * @see es.gva.cit.catalogClient.drivers.ICatalogServiceDriver#getServiceName()

         */

        public String getServiceName() {

                return ServerData.SERVER_SUBTYPE_CATALOG_SRW;

        }

        /*

         * (non-Javadoc)

         * @see es.gva.cit.catalogClient.drivers.ICatalogServiceDriver#getDefaultPort()

         */

        public int getDefaultPort() {                

                return 80;

        }

        /*

         * (non-Javadoc)

         * @see es.gva.cit.catalogClient.drivers.ICatalogServiceDriver#getDefaultSchema()

         */

        public String getDefaultSchema() {

                return "http";

        } 

}