| /* |
| * 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.geode.cache.lucene.internal; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.logging.log4j.Logger; |
| import org.apache.lucene.queryparser.flexible.core.QueryNodeException; |
| import org.apache.lucene.queryparser.flexible.standard.StandardQueryParser; |
| import org.apache.lucene.search.Query; |
| |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.cache.lucene.LuceneIndex; |
| import org.apache.geode.cache.lucene.LuceneQueryException; |
| import org.apache.geode.cache.lucene.LuceneQueryProvider; |
| import org.apache.geode.internal.serialization.DataSerializableFixedID; |
| import org.apache.geode.internal.serialization.DeserializationContext; |
| import org.apache.geode.internal.serialization.KnownVersion; |
| import org.apache.geode.internal.serialization.SerializationContext; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| /** |
| * Constructs a Lucene Query object by parsing a search string. The class uses |
| * {@link StandardQueryParser}. It sets searchable fields in a {@link LuceneIndex} as default |
| * fields. |
| */ |
| public class StringQueryProvider implements LuceneQueryProvider, DataSerializableFixedID { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private static final Logger logger = LogService.getLogger(); |
| |
| // the following members hold input data and needs to be sent on wire |
| private String query; |
| |
| // the following members hold derived objects and need not be serialized |
| private transient Query luceneQuery; |
| |
| private String defaultField; |
| |
| public StringQueryProvider() { |
| this(null, null); |
| } |
| |
| public StringQueryProvider(String query, String defaultField) { |
| this.query = query; |
| this.defaultField = defaultField; |
| } |
| |
| @Override |
| public synchronized Query getQuery(LuceneIndex index) throws LuceneQueryException { |
| if (luceneQuery == null) { |
| LuceneIndexImpl indexImpl = (LuceneIndexImpl) index; |
| StandardQueryParser parser = new StandardQueryParser(indexImpl.getAnalyzer()); |
| parser.setAllowLeadingWildcard(true); |
| try { |
| luceneQuery = parser.parse(query, defaultField); |
| if (logger.isDebugEnabled()) { |
| logger.debug("User query " + query + " is parsed to be: " + luceneQuery); |
| } |
| } catch (QueryNodeException e) { |
| logger.warn("Caught the following exception attempting parse query '" + query + "': ", e); |
| throw new LuceneQueryException( |
| String.format("Parsing query %s failed due to: %s", |
| "'" + query + "'", e.getMessage())); |
| } |
| } |
| return luceneQuery; |
| } |
| |
| /** |
| * @return the query string used to construct this query provider |
| */ |
| public String getQueryString() { |
| return query; |
| } |
| |
| @Override |
| public KnownVersion[] getSerializationVersions() { |
| return null; |
| } |
| |
| @Override |
| public int getDSFID() { |
| return LUCENE_STRING_QUERY_PROVIDER; |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| DataSerializer.writeString(query, out); |
| DataSerializer.writeString(defaultField, out); |
| } |
| |
| @Override |
| public void fromData(DataInput in, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| query = DataSerializer.readString(in); |
| defaultField = DataSerializer.readString(in); |
| } |
| } |