| /* |
| * 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.highlight; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.Iterator; |
| |
| import org.apache.lucene.index.BinaryDocValues; |
| import org.apache.lucene.index.DocValuesType; |
| import org.apache.lucene.index.FieldInfo; |
| import org.apache.lucene.index.FieldInfos; |
| import org.apache.lucene.index.Fields; |
| import org.apache.lucene.index.IndexOptions; |
| import org.apache.lucene.index.LeafMetaData; |
| import org.apache.lucene.index.LeafReader; |
| import org.apache.lucene.index.NumericDocValues; |
| import org.apache.lucene.index.PointValues; |
| import org.apache.lucene.index.SortedDocValues; |
| import org.apache.lucene.index.SortedNumericDocValues; |
| import org.apache.lucene.index.SortedSetDocValues; |
| import org.apache.lucene.index.StoredFieldVisitor; |
| import org.apache.lucene.index.Terms; |
| import org.apache.lucene.util.Bits; |
| import org.apache.lucene.util.Version; |
| |
| /** |
| * Wraps a Terms with a {@link org.apache.lucene.index.LeafReader}, typically from term vectors. |
| * |
| * @lucene.experimental |
| */ |
| public class TermVectorLeafReader extends LeafReader { |
| |
| private final Fields fields; |
| private final FieldInfos fieldInfos; |
| |
| public TermVectorLeafReader(String field, Terms terms) { |
| fields = new Fields() { |
| @Override |
| public Iterator<String> iterator() { |
| return Collections.singletonList(field).iterator(); |
| } |
| |
| @Override |
| public Terms terms(String fld) throws IOException { |
| if (!field.equals(fld)) { |
| return null; |
| } |
| return terms; |
| } |
| |
| @Override |
| public int size() { |
| return 1; |
| } |
| }; |
| |
| IndexOptions indexOptions; |
| if (!terms.hasFreqs()) { |
| indexOptions = IndexOptions.DOCS; |
| } else if (!terms.hasPositions()) { |
| indexOptions = IndexOptions.DOCS_AND_FREQS; |
| } else if (!terms.hasOffsets()) { |
| indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS; |
| } else { |
| indexOptions = IndexOptions.DOCS_AND_FREQS_AND_POSITIONS_AND_OFFSETS; |
| } |
| FieldInfo fieldInfo = new FieldInfo(field, 0, |
| true, true, terms.hasPayloads(), |
| indexOptions, DocValuesType.NONE, -1, Collections.emptyMap(), 0, 0, 0, false); |
| fieldInfos = new FieldInfos(new FieldInfo[]{fieldInfo}); |
| } |
| |
| @Override |
| protected void doClose() throws IOException { |
| } |
| |
| @Override |
| public Terms terms(String field) throws IOException { |
| return fields.terms(field); |
| } |
| |
| @Override |
| public NumericDocValues getNumericDocValues(String field) throws IOException { |
| return null; |
| } |
| |
| @Override |
| public BinaryDocValues getBinaryDocValues(String field) throws IOException { |
| return null; |
| } |
| |
| @Override |
| public SortedDocValues getSortedDocValues(String field) throws IOException { |
| return null; |
| } |
| |
| @Override |
| public SortedNumericDocValues getSortedNumericDocValues(String field) throws IOException { |
| return null; |
| } |
| |
| @Override |
| public SortedSetDocValues getSortedSetDocValues(String field) throws IOException { |
| return null; |
| } |
| |
| @Override |
| public NumericDocValues getNormValues(String field) throws IOException { |
| return null;//Is this needed? See MemoryIndex for a way to do it. |
| } |
| |
| @Override |
| public FieldInfos getFieldInfos() { |
| return fieldInfos; |
| } |
| |
| @Override |
| public Bits getLiveDocs() { |
| return null; |
| } |
| |
| @Override |
| public PointValues getPointValues(String fieldName) { |
| return null; |
| } |
| |
| @Override |
| public void checkIntegrity() throws IOException { |
| } |
| |
| @Override |
| public Fields getTermVectors(int docID) throws IOException { |
| if (docID != 0) { |
| return null; |
| } |
| return fields; |
| } |
| |
| @Override |
| public int numDocs() { |
| return 1; |
| } |
| |
| @Override |
| public int maxDoc() { |
| return 1; |
| } |
| |
| @Override |
| public void document(int docID, StoredFieldVisitor visitor) throws IOException { |
| } |
| |
| @Override |
| public LeafMetaData getMetaData() { |
| return new LeafMetaData(Version.LATEST.major, null, null); |
| } |
| |
| @Override |
| public CacheHelper getCoreCacheHelper() { |
| return null; |
| } |
| |
| @Override |
| public CacheHelper getReaderCacheHelper() { |
| return null; |
| } |
| } |