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.analysis.tokenattributes.PayloadAttribute;
import org.apache.lucene.analysis.tokenattributes.TypeAttribute;
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;
private PayloadAttribute payloadAtt;
private TypeAttribute typeAtt;
public NumericPayloadTokenFilter(TokenStream input, float payload, String typeMatch) {
super(input);
//Need to encode the payload
thePayload = new Payload(PayloadHelper.encodeFloat(payload));
this.typeMatch = typeMatch;
payloadAtt = (PayloadAttribute) addAttribute(PayloadAttribute.class);
typeAtt = (TypeAttribute) addAttribute(TypeAttribute.class);
}
public final boolean incrementToken() throws IOException {
if (input.incrementToken()) {
if (typeAtt.type().equals(typeMatch))
payloadAtt.setPayload(thePayload);
return true;
} else {
return false;
}
}
/** @deprecated Will be removed in Lucene 3.0. This method is final, as it should
* not be overridden. Delegates to the backwards compatibility layer. */
public final Token next(final Token reusableToken) throws java.io.IOException {
return super.next(reusableToken);
}
/** @deprecated Will be removed in Lucene 3.0. This method is final, as it should
* not be overridden. Delegates to the backwards compatibility layer. */
public final Token next() throws java.io.IOException {
return super.next();
}
}