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package org.apache.lucene.analysis.sinks;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import java.text.DateFormat;
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import java.text.ParseException;
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import java.util.Date;
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import org.apache.lucene.analysis.TeeSinkTokenFilter.SinkFilter;
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import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
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import org.apache.lucene.util.AttributeSource;
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* Attempts to parse the {@link org.apache.lucene.analysis.Token#termBuffer()} as a Date using a {@link java.text.DateFormat}.
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* If the value is a Date, it will add it to the sink.
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public class DateRecognizerSinkFilter extends SinkFilter {
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public static final String DATE_TYPE = "date";
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protected DateFormat dateFormat;
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protected CharTermAttribute termAtt;
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* Uses {@link java.text.SimpleDateFormat#getDateInstance()} as the {@link java.text.DateFormat} object.
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public DateRecognizerSinkFilter() {
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this(DateFormat.getDateInstance());
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public DateRecognizerSinkFilter(DateFormat dateFormat) {
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this.dateFormat = dateFormat;
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public boolean accept(AttributeSource source) {
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if (termAtt == null) {
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termAtt = source.addAttribute(CharTermAttribute.class);
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Date date = dateFormat.parse(termAtt.toString());//We don't care about the date, just that we can parse it as a date
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} catch (ParseException e) {