| /* |
| * 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.analysis.miscellaneous; |
| |
| import java.io.IOException; |
| import org.apache.lucene.analysis.TokenFilter; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.tokenattributes.KeywordAttribute; |
| |
| /** |
| * Marks terms as keywords via the {@link KeywordAttribute}. |
| * |
| * @see KeywordAttribute |
| */ |
| public abstract class KeywordMarkerFilter extends TokenFilter { |
| |
| private final KeywordAttribute keywordAttr = addAttribute(KeywordAttribute.class); |
| |
| /** |
| * Creates a new {@link KeywordMarkerFilter} |
| * |
| * @param in the input stream |
| */ |
| protected KeywordMarkerFilter(TokenStream in) { |
| super(in); |
| } |
| |
| @Override |
| public final boolean incrementToken() throws IOException { |
| if (input.incrementToken()) { |
| if (isKeyword()) { |
| keywordAttr.setKeyword(true); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| protected abstract boolean isKeyword(); |
| } |