package org.apache.lucene.facet.index.streaming;
import java.io.IOException;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.tokenattributes.PayloadAttribute;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.facet.index.params.FacetIndexingParams;
import org.apache.lucene.facet.taxonomy.CategoryPath;
/*
* 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.
*/
/**
* Basic class for setting the {@link CharTermAttribute}s and
* {@link PayloadAttribute}s of category tokens.
*
* @lucene.experimental
*/
public class CategoryTokenizer extends CategoryTokenizerBase {
/**
* @see CategoryTokenizerBase#CategoryTokenizerBase(TokenStream,
* FacetIndexingParams)
*/
public CategoryTokenizer(TokenStream input,
FacetIndexingParams indexingParams) {
super(input, indexingParams);
}
@Override
public final boolean incrementToken() throws IOException {
if (input.incrementToken()) {
if (categoryAttribute != null && categoryAttribute.getCategoryPath() != null) {
CategoryPath categoryPath = categoryAttribute.getCategoryPath();
char[] termBuffer = termAttribute.resizeBuffer(categoryPath.charsNeededForFullPath());
int nChars = indexingParams.drillDownTermText(categoryPath, termBuffer);
termAttribute.setLength(nChars);
setPayload();
}
return true;
}
return false;
}
/**
* Set the payload of the current category token.
*/
protected void setPayload() {
}
}