| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| //package org.apache.cloud.rdf.web.cloudbase.sail; |
| |
| // |
| //import RdfCloudTripleStoreConstants; |
| //import RdfCloudTripleStoreConstants; |
| //import org.eclipse.rdf4j.model.ValueFactory; |
| //import org.eclipse.rdf4j.model.impl.ValueFactoryImpl; |
| //import org.eclipse.rdf4j.query.GraphQuery; |
| //import org.eclipse.rdf4j.query.QueryLanguage; |
| //import org.eclipse.rdf4j.query.TupleQuery; |
| //import org.eclipse.rdf4j.query.resultio.sparqlxml.SPARQLResultsXMLWriter; |
| //import org.eclipse.rdf4j.repository.Repository; |
| //import org.eclipse.rdf4j.repository.RepositoryConnection; |
| //import org.eclipse.rdf4j.repository.RepositoryException; |
| //import org.eclipse.rdf4j.rio.rdfxml.RDFXMLWriter; |
| // |
| //import javax.servlet.ServletException; |
| //import javax.servlet.ServletOutputStream; |
| //import javax.servlet.http.HttpServletRequest; |
| //import javax.servlet.http.HttpServletResponse; |
| //import java.io.IOException; |
| //import java.io.PrintStream; |
| // |
| //public class QueryDataServlet extends AbstractRDFWebServlet { |
| // |
| // private static final ValueFactory VF = SimpleValueFactory.getInstance(); |
| // |
| // @Override |
| // protected void doGet(HttpServletRequest req, HttpServletResponse resp) |
| // throws ServletException, IOException { |
| // if (req == null || req.getInputStream() == null) |
| // return; |
| // |
| // String query = req.getParameter("query"); |
| // String ttl = req.getParameter("ttl"); |
| // String startTime = req.getParameter("startTime"); |
| // String infer = req.getParameter("infer"); |
| // String performant = req.getParameter("performant"); |
| // String useStats = req.getParameter("useStats"); |
| // String timeUris = req.getParameter("timeUris"); |
| // String tablePrefix = req.getParameter("tablePrefix"); |
| // |
| // //validate infer, performant |
| // if (infer != null) { |
| // Boolean.parseBoolean(infer); |
| // } else if (performant != null) { |
| // Boolean.parseBoolean(performant); |
| // } |
| // |
| // if (query == null) { |
| // throw new ServletException("Please set a query"); |
| // } |
| // if (query.toLowerCase().contains("select")) { |
| // try { |
| // performSelect(query, ttl, startTime, infer, performant, useStats, timeUris, tablePrefix, resp); |
| // } catch (Exception e) { |
| // throw new ServletException(e); |
| // } |
| // } else if (query.toLowerCase().contains("construct")) { |
| // try { |
| // performConstruct(query, ttl, startTime, infer, performant, useStats, timeUris, tablePrefix, resp); |
| // } catch (Exception e) { |
| // throw new ServletException(e); |
| // } |
| // } else { |
| // throw new ServletException("Invalid SPARQL query: " + query); |
| // } |
| // |
| // } |
| // |
| // private void performConstruct(String query, String ttl, String startTime, String infer, String performant, |
| // String useStats, String timeUris, String tablePrefix, HttpServletResponse resp) |
| // throws Exception { |
| // RepositoryConnection conn = null; |
| // try { |
| // ServletOutputStream os = resp.getOutputStream(); |
| // conn = repository.getConnection(); |
| // |
| // // query data |
| // GraphQuery graphQuery = conn.prepareGraphQuery( |
| // QueryLanguage.SPARQL, query); |
| // if (ttl != null && ttl.length() > 0) |
| // graphQuery.setBinding("ttl", VF.createLiteral(Long.parseLong(ttl))); |
| // if (startTime != null && startTime.length() > 0) |
| // graphQuery.setBinding("startTime", VF.createLiteral(Long.parseLong(startTime))); |
| // if (performant != null && performant.length() > 0) |
| // graphQuery.setBinding("performant", VF.createLiteral(Boolean.parseBoolean(performant))); |
| // if (infer != null && infer.length() > 0) |
| // graphQuery.setBinding("infer", VF.createLiteral(Boolean.parseBoolean(infer))); |
| // if (useStats != null && useStats.length() > 0) |
| // graphQuery.setBinding("useStats", VF.createLiteral(Boolean.parseBoolean(useStats))); |
| // if (timeUris != null && timeUris.length() > 0) |
| // graphQuery.setBinding("timeUris", VF.createIRI(timeUris)); |
| // if (tablePrefix != null && tablePrefix.length() > 0) |
| // RdfCloudTripleStoreConstants.prefixTables(tablePrefix); |
| // RDFXMLWriter rdfWriter = new RDFXMLWriter(os); |
| // graphQuery.evaluate(rdfWriter); |
| // |
| // } catch (Exception e) { |
| // resp.setStatus(500); |
| // e.printStackTrace(new PrintStream(resp.getOutputStream())); |
| // throw new ServletException(e); |
| // } finally { |
| // if (conn != null) { |
| // try { |
| // conn.close(); |
| // RdfCloudTripleStoreConstants.prefixTables(origTablePrefix); |
| // } catch (RepositoryException e) { |
| // |
| // } |
| // } |
| // } |
| // } |
| // |
| // private void performSelect(String query, String ttl, String startTime, String infer, String performant, |
| // String useStats, String timeUris, String tablePrefix, HttpServletResponse resp) |
| // throws Exception { |
| // RepositoryConnection conn = null; |
| // try { |
| // ServletOutputStream os = resp.getOutputStream(); |
| // conn = repository.getConnection(); |
| // |
| // // query data |
| // TupleQuery tupleQuery = conn.prepareTupleQuery( |
| // QueryLanguage.SPARQL, query); |
| // if (ttl != null && ttl.length() > 0) |
| // tupleQuery.setBinding("ttl", VF.createLiteral(Long.parseLong(ttl))); |
| // if (startTime != null && startTime.length() > 0) |
| // tupleQuery.setBinding("startTime", VF.createLiteral(Long.parseLong(startTime))); |
| // if (performant != null && performant.length() > 0) |
| // tupleQuery.setBinding("performant", VF.createLiteral(Boolean.parseBoolean(performant))); |
| // if (infer != null && infer.length() > 0) |
| // tupleQuery.setBinding("infer", VF.createLiteral(Boolean.parseBoolean(infer))); |
| // if (useStats != null && useStats.length() > 0) |
| // tupleQuery.setBinding("useStats", VF.createLiteral(Boolean.parseBoolean(useStats))); |
| // if (timeUris != null && timeUris.length() > 0) |
| // tupleQuery.setBinding("timeUris", VF.createIRI(timeUris)); |
| // if (tablePrefix != null && tablePrefix.length() > 0) |
| // RdfCloudTripleStoreConstants.prefixTables(tablePrefix); |
| // SPARQLResultsXMLWriter sparqlWriter = new SPARQLResultsXMLWriter(os); |
| // tupleQuery.evaluate(sparqlWriter); |
| // |
| // } catch (Exception e) { |
| // resp.setStatus(500); |
| // e.printStackTrace(new PrintStream(resp.getOutputStream())); |
| // throw new ServletException(e); |
| // } finally { |
| // if (conn != null) { |
| // try { |
| // conn.close(); |
| // RdfCloudTripleStoreConstants.prefixTables(origTablePrefix); |
| // } catch (RepositoryException e) { |
| // |
| // } |
| // } |
| // } |
| // } |
| // |
| // public Repository getRepository() { |
| // return repository; |
| // } |
| // |
| // public void setRepository(Repository repository) { |
| // this.repository = repository; |
| // } |
| //} |
