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156 lines
4.2 KiB
156 lines
4.2 KiB
/**
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* Triple_p
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* Copyright 2012 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 14.09.2011 at http://yacy.net
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import net.yacy.cora.lod.JenaTripleStore;
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import net.yacy.cora.protocol.RequestHeader;
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import net.yacy.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.logging.Log;
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import net.yacy.server.serverObjects;
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import net.yacy.server.serverSwitch;
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import net.yacy.server.http.HTTPDemon;
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import com.hp.hpl.jena.query.QueryExecution;
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import com.hp.hpl.jena.query.QueryExecutionFactory;
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import com.hp.hpl.jena.query.QueryFactory;
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import com.hp.hpl.jena.query.QuerySolution;
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import com.hp.hpl.jena.query.ResultSet;
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import com.hp.hpl.jena.query.ResultSetFormatter;
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public class Triple_p {
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public static serverObjects respond(@SuppressWarnings("unused") final RequestHeader header,
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final serverObjects post, @SuppressWarnings("unused") final serverSwitch env) {
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final serverObjects prop = new serverObjects();
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prop.put("display", 1); // Fixed to 1
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prop.putHTML("mode_output", "no query performed");
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String q = "PREFIX lln: <http://virtual.x/>\n"+
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"PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"+
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"PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>\n"+
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"SELECT ?resource ?pa\n"+
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"WHERE {\n"+
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"?resource lln:hasvalue ?pa .\n"+
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"FILTER (xsd:float (?pa) > 21.000)\n"+
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"}";
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if (post != null) {
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if (post.containsKey("submit")) {
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//
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System.out.println (post.get("submit"));
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}
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if (post.containsKey("rdffileslist")) {
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String list = post.get("rdffileslist");
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for (String s: list.split("\n")) {
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String newurl = s;
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try {
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DigestURI d = new DigestURI (s);
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if (d.getHost().endsWith(".yacy")) {
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newurl = d.getProtocol()+"://"+HTTPDemon.getAlternativeResolver().resolve(d.getHost())+d.getPath();
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System.out.println (newurl);
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}
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JenaTripleStore.load(newurl);
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} catch (MalformedURLException e) {
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Log.logException(e);
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} catch (IOException e) {
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Log.logException(e);
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}
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}
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}
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if (post.containsKey("rdffile")) {
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JenaTripleStore.addFile(post.get("rdffile$file"));
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}
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if (post.containsKey("query")) {
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// Create a new query
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String queryString = post.get("query");
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q = queryString;
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int count = 0;
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try {
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com.hp.hpl.jena.query.Query query = QueryFactory.create(queryString);
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// Execute the query and obtain results
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QueryExecution qe = QueryExecutionFactory.create(query, JenaTripleStore.model);
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ResultSet resultSet = qe.execSelect();
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ByteArrayOutputStream sos = new ByteArrayOutputStream();
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ResultSetFormatter.outputAsRDF(sos, "", resultSet);
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prop.putHTML("mode_rdfdump", sos.toString());
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int scount = 0;
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while (resultSet.hasNext()) {
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QuerySolution s = resultSet.next();
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prop.put("entries_"+scount+"_s", s.getResource(null).getURI());
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prop.put("entries_"+scount+"_p", s.getResource(null).getURI());
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prop.put("entries_"+scount+"_o", s.getResource(null).getURI());
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scount ++;
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}
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prop.putHTML("entries", ""+scount);
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for (String s: resultSet.getResultVars()) {
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prop.putHTML("mode_output_"+count+"_caption", s);
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count ++;
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}
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} catch (Exception e) {
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prop.putHTML("mode_rdfdump", "error");
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}
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prop.putHTML("mode_output", ""+count);
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}
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}
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prop.putHTML("mode_query", q);
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// return rewrite properties
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return prop;
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}
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}
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