Java tutorial
/* * Copyright (c) Grover C. Fields, http://www.groverfields.com/, 2005-2009. * All rights reserved. Software written by Grover C. Fields and others. * $Id: LICENSE,v 1.0 2008/12/01 05:00:00 Grover Exp $ * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's, * pioneering role in inventing and promulgating (and standardizing) the Java * language and environment is gratefully acknowledged. * * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for * inventing predecessor languages C and C++ is also gratefully acknowledged. */ import com.allaire.cfx.CustomTag; import com.allaire.cfx.Request; import com.allaire.cfx.Response; import com.revorg.goat.ConfigFiles; import com.revorg.goat.XMLReader; import java.util.Date; import java.util.Vector; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.queryParser.MultiFieldQueryParser; import org.apache.lucene.queryParser.QueryParser; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.Query; import org.apache.lucene.search.ScoreDoc; import org.apache.lucene.search.Sort; import org.apache.lucene.search.TopDocCollector; import org.apache.lucene.search.TopFieldDocs; /** * This class manages the CFX calls used exclusively from Coldfusion * * @version 1.0 * @author Grover C. Fields (grover_fields@yahoo.com) * @author http://www.groverfields.com */ /* Switch to private for JavaDocs only */ public class CFX_GoatSearch implements CustomTag { // Constant string for error messages final String msgError = "Error occurred in a <CFX_GOATSEARCH> tag. "; private static IndexReader reader; private static IndexWriter writer; private static IndexSearcher searcher; /* private CFX_GoatSearch() { } */ /** * Classes that implement this interface can be specified in the CLASS attribute of the Java CFX tag. For example, in a class MyCustomTag, which implements this interface, the following CFML code calls the MyCustomTag.processRequest method. * * @param request * @param response * @throws Exception */ public void processRequest(Request request, Response response) throws Exception { Date startTime = new Date(); String indexPath = null; String queryName = null; String searchString = null; String sortField = null; String sortDirection = null; int hitsPerPage = 0; int pageNumber = 0; Vector errors = new Vector(); if (request.attributeExists("INDEXPATH")) { indexPath = request.getAttribute("INDEXPATH"); } else { errors.add("The cfx_lucene tag requires an attribute called 'INDEXPATH'."); } if (request.attributeExists("HITSPERPAGE")) { hitsPerPage = request.getIntAttribute("HITSPERPAGE"); } if (request.attributeExists("PAGENUMBER")) { pageNumber = request.getIntAttribute("PAGENUMBER"); } if (request.attributeExists("QUERYNAME")) { queryName = request.getAttribute("QUERYNAME"); } else { errors.add("The cfx_lucene tag requires an attribute called 'QUERYNAME'."); } if (request.attributeExists("SEARCHSTRING")) { searchString = request.getAttribute("SEARCHSTRING"); } else { errors.add("The cfx_lucene tag requires an attribute called 'SEARCHSTRING'."); } //Sorting if (request.attributeExists("SORTFIELD")) { sortField = request.getAttribute("SORTFIELD"); } if (request.attributeExists("SORTDIRECTION")) { sortDirection = request.getAttribute("SORTDIRECTION"); } //Errors if (!errors.isEmpty()) { response.write("<h2 style=\"color: #FF0000\">CFX Goat Error:</h2>"); for (int i = 0; i < errors.size(); i++) { response.write("<p>Error: " + errors.get(i) + "</p>\n"); } //return; } else { try { IndexReader reader = IndexReader.open(indexPath); IndexSearcher searcher = new IndexSearcher(indexPath); if (searcher == null) { errors.add("Unable to open index"); } XMLReader readerXML = new XMLReader(); //XML Reader Class String configFile = ConfigFiles.getSchemaFile(indexPath); String[] indexTypeArray = new String[Integer.parseInt(readerXML.getTotalNodes(configFile))]; String[] columnNamesArray = new String[Integer.parseInt(readerXML.getTotalNodes(configFile))]; //Add Column Names int totalNodes = columnNamesArray.length; String nodeName = ""; //Sort .:. Index Type must be PrimaryKey,Keyword,Date Sort sortby = new Sort(); if (sortField != null) sortField.trim().toLowerCase(); //Change Field TO LowerCase Analyzer analyzer = new StandardAnalyzer(); QueryParser parser = new MultiFieldQueryParser(columnNamesArray, analyzer); Query query = parser.parse(searchString); if (query == null) { errors.add("Unable to build Query"); } //Build Query Here //Get Column Names for (int i = 0; i < totalNodes; i++) { columnNamesArray[i] = readerXML.getNodeValueByFile(configFile, i, "columnname"); indexTypeArray[i] = readerXML.getNodeValueByFile(configFile, i, "indextype"); /* Make Sure Field Can Be Seached */ if (columnNamesArray[i].equalsIgnoreCase(sortField) && (indexTypeArray[i].equalsIgnoreCase("PrimaryKey") || indexTypeArray[i].equalsIgnoreCase("Keyword") || indexTypeArray[i].equalsIgnoreCase("Date"))) { //Sort Ascending if (sortDirection != null && sortDirection.equalsIgnoreCase("desc")) { System.out.println("desc"); sortby = new Sort(sortField, true); } else if (sortDirection != null && sortDirection.equalsIgnoreCase("asc")) { System.out.println("asc"); sortby = new Sort(sortField, false); } } } if (hitsPerPage < 1) hitsPerPage = 1; int pageNum = pageNumber; int recordSet = (pageNum * hitsPerPage) + 100; TopFieldDocs resultDocs = searcher.search(query, null, recordSet, sortby); ScoreDoc[] hits = resultDocs.scoreDocs; int numTotalHits = resultDocs.totalHits; //Start int start = (pageNum - 1); if (start < 0) start = 0; if (pageNum > 1) { start = (pageNum * hitsPerPage) - hitsPerPage; } int end = (pageNum * hitsPerPage); end = Math.min(hits.length, start + hitsPerPage); //Coldfusion Query com.allaire.cfx.Query goatQuery = response.addQuery(queryName, columnNamesArray); for (int i = start; i < end; i++) { int row = goatQuery.addRow(); //Add Row int docId = hits[i].doc; Document d = searcher.doc(docId); for (int x = 0; x < totalNodes; x++) { nodeName = columnNamesArray[x]; goatQuery.setData(row, (x + 1), d.get(nodeName)); //Insert Values .:. Set Data starts with 1 } } //reader.close(); searcher.close(); Date endTime = new Date(); //Set other Values response.setVariable("goat.totaltime", Long.toString(endTime.getTime() - startTime.getTime())); response.setVariable("goat.totalresults", Integer.toString(numTotalHits)); response.setVariable("goat.totalpages", Integer.toString((numTotalHits / hitsPerPage))); } catch (Exception e) { errors.add("Failure caught a " + e.getClass() + " with message: " + e.getMessage()); } } //Output Final Errors If Needed if (!errors.isEmpty()) { response.write("<h2 style=\"color: #FF0000\">CFX Goat Error:</h2>"); for (int i = 0; i < errors.size(); i++) { response.write("<p>Error: " + errors.get(i) + "</p>\n"); } } } }