Lucene example source code file (CorePlusExtensionsParser.java)

This example Lucene source code file (CorePlusExtensionsParser.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Lucene tags/keywords

booleanfilter, booleanfilterbuilder, boostingquerybuilder, coreparser, coreplusextensionsparser, coreplusextensionsparser, duplicatefilter, likethisquery, likethisquerybuilder, queryparser, queryparser, string, string, termsfilterbuilder

The Lucene CorePlusExtensionsParser.java source code

package org.apache.lucene.xmlparser;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.xmlparser.builders.BooleanFilterBuilder;
import org.apache.lucene.xmlparser.builders.BoostingQueryBuilder;
import org.apache.lucene.xmlparser.builders.DuplicateFilterBuilder;
import org.apache.lucene.xmlparser.builders.FuzzyLikeThisQueryBuilder;
import org.apache.lucene.xmlparser.builders.LikeThisQueryBuilder;
import org.apache.lucene.xmlparser.builders.TermsFilterBuilder;
/**
 * 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.
 */

/**
 * 
 */
public class CorePlusExtensionsParser extends CoreParser
{

	/**
	 * Construct an XML parser that uses a single instance QueryParser for handling 
	 * UserQuery tags - all parse operations are synchronized on this parser
	 * @param analyzer
	 * @param parser A QueryParser which will be synchronized on during parse calls.
	 */
	public CorePlusExtensionsParser(Analyzer analyzer, QueryParser parser)
	{
		this(null,analyzer, parser);
	}
	/**
	 * Constructs an XML parser that creates a QueryParser for each UserQuery request.
	 * @param defaultField The default field name used by QueryParsers constructed for UserQuery tags 
	 * @param analyzer 
	 */
	public CorePlusExtensionsParser(String defaultField,Analyzer analyzer)
	{
		this(defaultField,analyzer, null);
	}

	private CorePlusExtensionsParser(String defaultField,Analyzer analyzer, QueryParser parser)
	{
		super(defaultField,analyzer, parser);
		filterFactory.addBuilder("TermsFilter",new TermsFilterBuilder(analyzer));
		filterFactory.addBuilder("BooleanFilter",new BooleanFilterBuilder(filterFactory));
		filterFactory.addBuilder("DuplicateFilter",new DuplicateFilterBuilder());
		String fields[]={"contents"};
		queryFactory.addBuilder("LikeThisQuery",new LikeThisQueryBuilder(analyzer,fields));
		queryFactory.addBuilder("BoostingQuery", new BoostingQueryBuilder(queryFactory));
		queryFactory.addBuilder("FuzzyLikeThisQuery", new FuzzyLikeThisQueryBuilder(analyzer));
		
	}
}