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Lucene example source code file (TermsFilterBuilder.java)

This example Lucene source code file (TermsFilterBuilder.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

dom, error, io, ioexception, parserexception, runtimeexception, string, string, stringreader, term, term, termsfilter, termsfilter, termsfilterbuilder, termsfilterbuilder, tokenstream

The Lucene TermsFilterBuilder.java source code

package org.apache.lucene.xmlparser.builders;

import java.io.IOException;
import java.io.StringReader;

import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.TermsFilter;
import org.apache.lucene.xmlparser.DOMUtils;
import org.apache.lucene.xmlparser.FilterBuilder;
import org.apache.lucene.xmlparser.ParserException;
import org.w3c.dom.Element;

 * 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

public class TermsFilterBuilder implements FilterBuilder
	Analyzer analyzer;
	 * @param analyzer
	public TermsFilterBuilder(Analyzer analyzer)
		this.analyzer = analyzer;
	 * (non-Javadoc)
	 * @see org.apache.lucene.xmlparser.FilterBuilder#process(org.w3c.dom.Element)
	public Filter getFilter(Element e) throws ParserException
		TermsFilter tf = new TermsFilter();
		String text = DOMUtils.getNonBlankTextOrFail(e);
		String fieldName = DOMUtils.getAttributeWithInheritanceOrFail(e, "fieldName");
	    TokenStream ts = analyzer.reusableTokenStream(fieldName, new StringReader(text));
	    CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
			Term term = null;
	      while (ts.incrementToken()) {
				if (term == null)
					term = new Term(fieldName, termAtt.toString());
				} else
//					 create from previous to save fieldName.intern overhead
					term = term.createTerm(termAtt.toString()); 
		catch (IOException ioe)
			throw new RuntimeException("Error constructing terms from index:"
					+ ioe);
		return tf;

Other Lucene examples (source code examples)

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