org.elasticsearch.common.lucene.all.AllTokenStream Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.
*/
package org.elasticsearch.common.lucene.all;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.PayloadAttribute;
import org.apache.lucene.index.Payload;
import java.io.IOException;
import static org.apache.lucene.analysis.payloads.PayloadHelper.*;
/**
* @author kimchy (shay.banon)
*/
public class AllTokenStream extends TokenFilter {
public static TokenStream allTokenStream(String allFieldName, AllEntries allEntries, Analyzer analyzer) throws IOException {
return new AllTokenStream(analyzer.reusableTokenStream(allFieldName, allEntries), allEntries);
}
private final AllEntries allEntries;
private final PayloadAttribute payloadAttribute;
AllTokenStream(TokenStream input, AllEntries allEntries) {
super(input);
this.allEntries = allEntries;
payloadAttribute = addAttribute(PayloadAttribute.class);
}
public AllEntries allEntries() {
return allEntries;
}
@Override public boolean incrementToken() throws IOException {
if (!input.incrementToken()) {
return false;
}
if (allEntries.current() != null) {
float boost = allEntries.current().boost();
if (boost != 1.0f) {
payloadAttribute.setPayload(new Payload(encodeFloat(boost)));
} else {
payloadAttribute.setPayload(null);
}
}
return true;
}
@Override public String toString() {
return allEntries.toString();
}
}