| /* |
| * 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.uniformsplit.sharedterms; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import org.apache.lucene.codecs.BlockTermState; |
| import org.apache.lucene.codecs.PostingsReaderBase; |
| import org.apache.lucene.codecs.uniformsplit.BlockDecoder; |
| import org.apache.lucene.codecs.uniformsplit.FieldMetadata; |
| import org.apache.lucene.codecs.uniformsplit.IndexDictionary; |
| import org.apache.lucene.index.FieldInfos; |
| import org.apache.lucene.index.PostingsEnum; |
| import org.apache.lucene.index.TermState; |
| import org.apache.lucene.store.IndexInput; |
| import org.apache.lucene.util.BytesRef; |
| |
| /** |
| * {@link org.apache.lucene.index.TermsEnum} used when merging segments, |
| * to enumerate the terms of an input segment and get all the fields {@link TermState}s |
| * of each term. |
| * <p> |
| * It only supports calls to {@link #next()} and no seek method. |
| * |
| * @lucene.experimental |
| */ |
| public class STMergingBlockReader extends STBlockReader { |
| |
| public STMergingBlockReader( |
| IndexDictionary.BrowserSupplier dictionaryBrowserSupplier, |
| IndexInput blockInput, |
| PostingsReaderBase postingsReader, |
| FieldMetadata fieldMetadata, |
| BlockDecoder blockDecoder, |
| FieldInfos fieldInfos) throws IOException { |
| super(dictionaryBrowserSupplier, blockInput, postingsReader, fieldMetadata, blockDecoder, fieldInfos); |
| } |
| |
| @Override |
| public SeekStatus seekCeil(BytesRef searchedTerm) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public boolean seekExact(BytesRef searchedTerm) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void seekExact(BytesRef term, TermState state) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void seekExact(long ord) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| protected BlockTermState readTermStateIfNotRead() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public BytesRef next() throws IOException { |
| return nextTerm(); |
| } |
| |
| /** |
| * Creates a new {@link PostingsEnum} for the provided field and {@link BlockTermState}. |
| * @param reuse Previous {@link PostingsEnum} to reuse; or null to create a new one. |
| * @param flags Postings flags. |
| */ |
| public PostingsEnum postings(String fieldName, BlockTermState termState, PostingsEnum reuse, int flags) throws IOException { |
| return postingsReader.postings(fieldInfos.fieldInfo(fieldName), termState, reuse, flags); |
| } |
| |
| /** |
| * Reads all the fields {@link TermState}s of the current term and put them |
| * in the provided map. Clears the map first, before putting {@link TermState}s. |
| */ |
| public void readFieldTermStatesMap(Map<String, BlockTermState> fieldTermStatesMap) throws IOException { |
| if (term() != null) { |
| termStatesReadBuffer.setPosition(blockFirstLineStart + blockHeader.getTermStatesBaseOffset() + blockLine.getTermStateRelativeOffset()); |
| ((STBlockLine.Serializer) blockLineReader).readFieldTermStatesMap( |
| termStatesReadBuffer, |
| termStateSerializer, |
| blockHeader, |
| fieldInfos, |
| fieldTermStatesMap |
| ); |
| } |
| } |
| } |