Java tutorial
/* * 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.search.vectorhighlight; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.apache.lucene.search.vectorhighlight.FieldFragList.WeightedFragInfo; import org.apache.lucene.search.vectorhighlight.FieldPhraseList.WeightedPhraseInfo; /** * An implementation class of {@link FragListBuilder} that generates one {@link WeightedFragInfo} object. * Typical use case of this class is that you can get an entire field contents * by using both of this class and {@link SimpleFragmentsBuilder}.<br> * <pre class="prettyprint"> * FastVectorHighlighter h = new FastVectorHighlighter( true, true, * new SingleFragListBuilder(), new SimpleFragmentsBuilder() ); * </pre> */ public class SingleFragListBuilder implements FragListBuilder { @Override public FieldFragList createFieldFragList(FieldPhraseList fieldPhraseList, int fragCharSize) { FieldFragList ffl = new SimpleFieldFragList(fragCharSize); List<WeightedPhraseInfo> wpil = new ArrayList<>(); Iterator<WeightedPhraseInfo> ite = fieldPhraseList.phraseList.iterator(); WeightedPhraseInfo phraseInfo = null; while (true) { if (!ite.hasNext()) break; phraseInfo = ite.next(); if (phraseInfo == null) break; wpil.add(phraseInfo); } if (wpil.size() > 0) ffl.add(0, Integer.MAX_VALUE, wpil); return ffl; } }