package org.apache.lucene.analysis.payloads;
/**
* 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 org.apache.lucene.analysis.Token;
import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.index.Payload;
import java.io.IOException;
/**
* Assigns a payload to a token based on the {@link org.apache.lucene.analysis.Token#type()}
*
**/
public class NumericPayloadTokenFilter extends TokenFilter {
private String typeMatch;
private Payload thePayload;
public NumericPayloadTokenFilter(TokenStream input, float payload, String typeMatch) {
super(input);
//Need to encode the payload
thePayload = new Payload(PayloadHelper.encodeFloat(payload));
this.typeMatch = typeMatch;
}
public Token next(final Token reusableToken) throws IOException {
assert reusableToken != null;
Token nextToken = input.next(reusableToken);
if (nextToken != null && nextToken.type().equals(typeMatch)){
nextToken.setPayload(thePayload);
}
return nextToken;
}
}