| /* |
| * 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. |
| */ |
| package org.apache.lucene.codecs.idversion; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PayloadAttribute; |
| import org.apache.lucene.document.Field; |
| import org.apache.lucene.document.FieldType; |
| import org.apache.lucene.index.IndexOptions; |
| import org.apache.lucene.util.BytesRef; |
| |
| // TODO: can we take a BytesRef token instead? |
| |
| /** Produces a single String token from the provided value, with the provided payload. */ |
| class StringAndPayloadField extends Field { |
| |
| public static final FieldType TYPE = new FieldType(); |
| |
| static { |
| TYPE.setOmitNorms(true); |
| TYPE.setIndexOptions(IndexOptions.DOCS_AND_FREQS_AND_POSITIONS); |
| TYPE.setTokenized(true); |
| TYPE.freeze(); |
| } |
| |
| private final BytesRef payload; |
| |
| public StringAndPayloadField(String name, String value, BytesRef payload) { |
| super(name, value, TYPE); |
| this.payload = payload; |
| } |
| |
| @Override |
| public TokenStream tokenStream(Analyzer analyzer, TokenStream reuse) { |
| SingleTokenWithPayloadTokenStream ts; |
| if (reuse instanceof SingleTokenWithPayloadTokenStream) { |
| ts = (SingleTokenWithPayloadTokenStream) reuse; |
| } else { |
| ts = new SingleTokenWithPayloadTokenStream(); |
| } |
| ts.setValue((String) fieldsData, payload); |
| return ts; |
| } |
| |
| static final class SingleTokenWithPayloadTokenStream extends TokenStream { |
| |
| private final CharTermAttribute termAttribute = addAttribute(CharTermAttribute.class); |
| private final PayloadAttribute payloadAttribute = addAttribute(PayloadAttribute.class); |
| private boolean used = false; |
| private String value = null; |
| private BytesRef payload; |
| |
| /** Sets the string value. */ |
| void setValue(String value, BytesRef payload) { |
| this.value = value; |
| this.payload = payload; |
| } |
| |
| @Override |
| public boolean incrementToken() { |
| if (used) { |
| return false; |
| } |
| clearAttributes(); |
| termAttribute.append(value); |
| payloadAttribute.setPayload(payload); |
| used = true; |
| return true; |
| } |
| |
| @Override |
| public void reset() { |
| used = false; |
| } |
| |
| @Override |
| public void close() { |
| value = null; |
| payload = null; |
| } |
| } |
| } |
| |
| |