mirror of https://github.com/apache/lucene.git
LUCENE-8291: Build Fix. Removing Demo Servlet.
This commit is contained in:
Mikhail Khludnev
parent
11c6a7ad88
commit
09a789f535
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.lucene.demo.xmlparser;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.nio.charset.StandardCharsets;
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import java.util.Enumeration;
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import java.util.Properties;
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import java.util.StringTokenizer;
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import javax.servlet.RequestDispatcher;
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import javax.servlet.ServletConfig;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.apache.lucene.analysis.Analyzer;
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import org.apache.lucene.analysis.standard.StandardAnalyzer;
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import org.apache.lucene.document.Document;
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import org.apache.lucene.document.Field;
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import org.apache.lucene.document.FieldType;
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import org.apache.lucene.document.TextField;
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import org.apache.lucene.index.DirectoryReader;
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import org.apache.lucene.index.IndexReader;
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import org.apache.lucene.index.IndexWriter;
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import org.apache.lucene.index.IndexWriterConfig;
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import org.apache.lucene.queryparser.xml.CorePlusExtensionsParser;
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import org.apache.lucene.queryparser.xml.QueryTemplateManager;
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import org.apache.lucene.search.IndexSearcher;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.search.ScoreDoc;
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import org.apache.lucene.search.TopDocs;
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import org.apache.lucene.store.RAMDirectory;
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/**
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* Example servlet that uses the XML queryparser.
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* <p>
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* NOTE: you must provide CSV data in <code>/WEB-INF/data.tsv</code>
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* for the demo to work!
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*/
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public class FormBasedXmlQueryDemo extends HttpServlet {
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private QueryTemplateManager queryTemplateManager;
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private CorePlusExtensionsParser xmlParser;
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private IndexSearcher searcher;
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private Analyzer analyzer = new StandardAnalyzer();
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/** for instantiation by the servlet container */
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public FormBasedXmlQueryDemo() {}
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@Override
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public void init(ServletConfig config) throws ServletException {
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super.init(config);
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try {
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openExampleIndex();
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//load servlet configuration settings
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String xslFile = config.getInitParameter("xslFile");
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String defaultStandardQueryParserField = config.getInitParameter("defaultStandardQueryParserField");
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//Load and cache choice of XSL query template using QueryTemplateManager
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queryTemplateManager = new QueryTemplateManager(
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getServletContext().getResourceAsStream("/WEB-INF/" + xslFile));
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//initialize an XML Query Parser for use by all threads
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xmlParser = new CorePlusExtensionsParser(defaultStandardQueryParserField, analyzer);
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} catch (Exception e) {
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throw new ServletException("Error loading query template", e);
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}
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}
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@Override
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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//Take all completed form fields and add to a Properties object
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Properties completedFormFields = new Properties();
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Enumeration<?> pNames = request.getParameterNames();
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while (pNames.hasMoreElements()) {
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String propName = (String) pNames.nextElement();
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String value = request.getParameter(propName);
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if ((value != null) && (value.trim().length() > 0)) {
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completedFormFields.setProperty(propName, value);
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}
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}
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try {
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//Create an XML query by populating template with given user criteria
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org.w3c.dom.Document xmlQuery = queryTemplateManager.getQueryAsDOM(completedFormFields);
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//Parse the XML to produce a Lucene query
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Query query = xmlParser.getQuery(xmlQuery.getDocumentElement());
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//Run the query
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TopDocs topDocs = searcher.search(query, 10);
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//and package the results and forward to JSP
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if (topDocs != null) {
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ScoreDoc[] sd = topDocs.scoreDocs;
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Document[] results = new Document[sd.length];
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for (int i = 0; i < results.length; i++) {
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results[i] = searcher.doc(sd[i].doc);
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request.setAttribute("results", results);
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}
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}
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RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("/index.jsp");
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dispatcher.forward(request, response);
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}
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catch (Exception e) {
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throw new ServletException("Error processing query", e);
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}
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}
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private void openExampleIndex() throws IOException {
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//Create a RAM-based index from our test data file
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RAMDirectory rd = new RAMDirectory();
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IndexWriterConfig iwConfig = new IndexWriterConfig(analyzer);
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IndexWriter writer = new IndexWriter(rd, iwConfig);
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InputStream dataIn = getServletContext().getResourceAsStream("/WEB-INF/data.tsv");
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BufferedReader br = new BufferedReader(new InputStreamReader(dataIn, StandardCharsets.UTF_8));
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String line = br.readLine();
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final FieldType textNoNorms = new FieldType(TextField.TYPE_STORED);
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textNoNorms.setOmitNorms(true);
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while (line != null) {
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line = line.trim();
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if (line.length() > 0) {
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//parse row and create a document
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StringTokenizer st = new StringTokenizer(line, "\t");
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Document doc = new Document();
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doc.add(new Field("location", st.nextToken(), textNoNorms));
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doc.add(new Field("salary", st.nextToken(), textNoNorms));
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doc.add(new Field("type", st.nextToken(), textNoNorms));
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doc.add(new Field("description", st.nextToken(), textNoNorms));
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writer.addDocument(doc);
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}
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line = br.readLine();
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}
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writer.close();
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//open searcher
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// this example never closes it reader!
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IndexReader reader = DirectoryReader.open(rd);
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searcher = new IndexSearcher(reader);
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}
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}
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@ -1,21 +0,0 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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||||||
*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Demo servlet for the XML Query Parser.
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*/
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package org.apache.lucene.demo.xmlparser;
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