Java tutorial
/* * 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 com.searchbox.solr; import com.searchbox.commons.params.SenseParams; import com.searchbox.lucene.SenseQuery; import com.searchbox.math.RealTermFreqVector; import org.apache.lucene.document.Document; import org.apache.lucene.index.Term; import org.apache.lucene.search.BooleanClause; import org.apache.lucene.search.BooleanQuery; import org.apache.lucene.search.Query; import org.apache.lucene.search.Sort; import org.apache.lucene.search.TermQuery; import org.apache.solr.common.SolrException; import org.apache.solr.common.params.CommonParams; import org.apache.solr.common.params.FacetParams; import org.apache.solr.common.params.MoreLikeThisParams; import org.apache.solr.common.params.SolrParams; import org.apache.solr.common.util.ContentStream; import org.apache.solr.common.util.NamedList; import org.apache.solr.core.SolrCore; import org.apache.solr.handler.RequestHandlerBase; import org.apache.solr.request.SimpleFacets; import org.apache.solr.request.SolrQueryRequest; import org.apache.solr.response.SolrQueryResponse; import org.apache.solr.schema.SchemaField; import org.apache.solr.search.DocIterator; import org.apache.solr.search.DocList; import org.apache.solr.search.DocListAndSet; import org.apache.solr.search.QParser; import org.apache.solr.search.QParserPlugin; import org.apache.solr.search.QueryParsing; import org.apache.solr.search.ReturnFields; import org.apache.solr.search.SolrIndexSearcher; import org.apache.solr.search.SolrReturnFields; import org.apache.solr.search.SortSpec; import org.apache.solr.util.SolrPluginUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.Reader; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.regex.Pattern; /** * Solr MoreLikeThis -- * <p/> * Return similar documents either based on a single document or based on posted * text. * * @since solr 1.3 */ public class SenseLikeThisHandlerNoReduction extends RequestHandlerBase { // Pattern is thread safe -- TODO? share this with general 'fl' param private static final Logger LOGGER = LoggerFactory.getLogger(SenseLikeThisHandlerNoReduction.class); private static final Pattern splitList = Pattern.compile(",| "); private boolean keystate = true; @Override public void init(NamedList args) { super.init(args); } private boolean checkLicense(String key, String PRODUCT_KEY) { return com.searchbox.utils.DecryptLicense.checkLicense(key, PRODUCT_KEY); } @Override public void handleRequestBody(SolrQueryRequest req, SolrQueryResponse rsp) throws Exception { SolrParams params = req.getParams(); if (!keystate) { LOGGER.error( "License key failure, not performing sense query. Please email contact@searchbox.com for more information."); return; } int docID; // Set field flags ReturnFields returnFields = new SolrReturnFields(req); rsp.setReturnFields(returnFields); int flags = 0; if (returnFields.wantsScore()) { flags |= SolrIndexSearcher.GET_SCORES; } String defType = params.get(QueryParsing.DEFTYPE, QParserPlugin.DEFAULT_QTYPE); String q = params.get(CommonParams.Q); Query query = null; SortSpec sortSpec = null; List<Query> filters = new ArrayList<Query>(); try { if (q != null) { QParser parser = QParser.getParser(q, defType, req); query = parser.getQuery(); sortSpec = parser.getSort(true); } String[] fqs = req.getParams().getParams(CommonParams.FQ); if (fqs != null && fqs.length != 0) { for (String fq : fqs) { if (fq != null && fq.trim().length() != 0) { QParser fqp = QParser.getParser(fq, null, req); filters.add(fqp.getQuery()); } } } } catch (Exception e) { throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, e); } SolrIndexSearcher searcher = req.getSearcher(); SchemaField uniqueKeyField = searcher.getSchema().getUniqueKeyField(); DocListAndSet sltDocs = null; // Parse Required Params // This will either have a single Reader or valid query Reader reader = null; try { if (q == null || q.trim().length() < 1) { Iterable<ContentStream> streams = req.getContentStreams(); if (streams != null) { Iterator<ContentStream> iter = streams.iterator(); if (iter.hasNext()) { reader = iter.next().getReader(); } if (iter.hasNext()) { throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "SenseLikeThis does not support multiple ContentStreams"); } } } int start = params.getInt(CommonParams.START, 0); int rows = params.getInt(CommonParams.ROWS, 10); // Find documents SenseLikeThis - either with a reader or a query // -------------------------------------------------------------------------------- SenseQuery slt = null; if (reader != null) { throw new RuntimeException("SLT based on a reader is not yet implemented"); } else if (q != null) { // Matching options boolean includeMatch = params.getBool(MoreLikeThisParams.MATCH_INCLUDE, true); int matchOffset = params.getInt(MoreLikeThisParams.MATCH_OFFSET, 0); // Find the base match DocList match = searcher.getDocList(query, null, null, matchOffset, 1, flags); // only get the first one... if (includeMatch) { rsp.add("match", match); } // Get docID DocIterator iterator = match.iterator(); docID = iterator.nextDoc(); BooleanQuery bq = new BooleanQuery(); Document doc = searcher.getIndexReader().document(docID); bq.add(new TermQuery(new Term(uniqueKeyField.getName(), uniqueKeyField.getType().storedToIndexed(doc.getField(uniqueKeyField.getName())))), BooleanClause.Occur.MUST_NOT); filters.add(bq); } else { throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, "SenseLikeThis requires either a query (?q=) or text to find similar documents."); } String CKBid = params.get(SenseParams.SENSE_CKB, SenseParams.SENSE_CKB_DEFAULT); String senseField = params.get(SenseParams.SENSE_FIELD, SenseParams.DEFAULT_SENSE_FIELD); slt = new SenseQuery(new RealTermFreqVector(docID, searcher.getIndexReader(), senseField), senseField, CKBid, params.getFloat(SenseParams.SENSE_WEIGHT, SenseParams.DEFAULT_SENSE_WEIGHT), null); //Execute the SLT query //DocSet filtered = searcher.getDocSet(filters); //System.out.println("Number of documents to search:\t" + filtered.size()); //sltDocs = searcher.getDocListAndSet(slt, filtered, Sort.RELEVANCE, start, rows, flags); sltDocs = searcher.getDocListAndSet(slt, filters, Sort.RELEVANCE, start, rows, flags); } finally { if (reader != null) { reader.close(); } } if (sltDocs == null) { sltDocs = new DocListAndSet(); // avoid NPE } rsp.add("response", sltDocs.docList); // maybe facet the results if (params.getBool(FacetParams.FACET, false)) { if (sltDocs.docSet == null) { rsp.add("facet_counts", null); } else { SimpleFacets f = new SimpleFacets(req, sltDocs.docSet, params); rsp.add("facet_counts", f.getFacetCounts()); } } // Debug info, not doing it for the moment. boolean dbg = req.getParams().getBool(CommonParams.DEBUG_QUERY, false); boolean dbgQuery = false, dbgResults = false; if (dbg == false) {//if it's true, we are doing everything anyway. String[] dbgParams = req.getParams().getParams(CommonParams.DEBUG); if (dbgParams != null) { for (int i = 0; i < dbgParams.length; i++) { if (dbgParams[i].equals(CommonParams.QUERY)) { dbgQuery = true; } else if (dbgParams[i].equals(CommonParams.RESULTS)) { dbgResults = true; } } } } else { dbgQuery = true; dbgResults = true; } // Copied from StandardRequestHandler... perhaps it should be added to doStandardDebug? if (dbg == true) { try { NamedList<Object> dbgInfo = SolrPluginUtils.doStandardDebug(req, q, query, sltDocs.docList, dbgQuery, dbgResults); if (null != dbgInfo) { if (null != filters) { dbgInfo.add("filter_queries", req.getParams().getParams(CommonParams.FQ)); List<String> fqs = new ArrayList<String>(filters.size()); for (Query fq : filters) { fqs.add(QueryParsing.toString(fq, req.getSchema())); } dbgInfo.add("parsed_filter_queries", fqs); } rsp.add("debug", dbgInfo); } } catch (Exception e) { SolrException.log(SolrCore.log, "Exception during debug", e); rsp.add("exception_during_debug", SolrException.toStr(e)); } } } //////////////////////// SolrInfoMBeans methods ////////////////////// @Override public String getDescription() { return "Searchbox SenseLikeThis"; } @Override public String getSource() { return "$URL: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_0/solr/core/src/java/org/apache/solr/handler/MoreLikeThisHandler.java $"; } @Override public URL[] getDocs() { try { return new URL[] { new URL("http://wiki.apache.org/solr/MoreLikeThis") }; } catch (MalformedURLException ex) { return null; } } }