package org.apache.lucene.analysis.sinks;
/**
* 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.
*/
import java.text.DateFormat;
import java.text.ParseException;
import java.util.Date;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.util.AttributeSource;
/**
* Attempts to parse the {@link org.apache.lucene.analysis.Token#termBuffer()} as a Date using a {@link java.text.DateFormat}.
* If the value is a Date, it will add it to the sink.
* <p/>
*
**/
public class DateRecognizerSinkFilter extends TeeSinkTokenFilter.SinkFilter {
public static final String DATE_TYPE = "date";
protected DateFormat dateFormat;
protected CharTermAttribute termAtt;
/**
* Uses {@link java.text.SimpleDateFormat#getDateInstance()} as the {@link java.text.DateFormat} object.
*/
public DateRecognizerSinkFilter() {
this(DateFormat.getDateInstance());
}
public DateRecognizerSinkFilter(DateFormat dateFormat) {
this.dateFormat = dateFormat;
}
@Override
public boolean accept(AttributeSource source) {
if (termAtt == null) {
termAtt = source.addAttribute(CharTermAttribute.class);
}
try {
Date date = dateFormat.parse(termAtt.toString());//We don't care about the date, just that we can parse it as a date
if (date != null) {
return true;
}
} catch (ParseException e) {
}
return false;
}
}