| /* |
| * 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.index; |
| |
| |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * {@link IndexReaderContext} for {@link LeafReader} instances. |
| */ |
| public final class LeafReaderContext extends IndexReaderContext { |
| /** The reader's ord in the top-level's leaves array */ |
| public final int ord; |
| /** The reader's absolute doc base */ |
| public final int docBase; |
| |
| private final LeafReader reader; |
| private final List<LeafReaderContext> leaves; |
| |
| /** |
| * Creates a new {@link LeafReaderContext} |
| */ |
| LeafReaderContext(CompositeReaderContext parent, LeafReader reader, |
| int ord, int docBase, int leafOrd, int leafDocBase) { |
| super(parent, ord, docBase); |
| this.ord = leafOrd; |
| this.docBase = leafDocBase; |
| this.reader = reader; |
| this.leaves = isTopLevel ? Collections.singletonList(this) : null; |
| } |
| |
| LeafReaderContext(LeafReader leafReader) { |
| this(null, leafReader, 0, 0, 0, 0); |
| } |
| |
| @Override |
| public List<LeafReaderContext> leaves() { |
| if (!isTopLevel) { |
| throw new UnsupportedOperationException("This is not a top-level context."); |
| } |
| assert leaves != null; |
| return leaves; |
| } |
| |
| @Override |
| public List<IndexReaderContext> children() { |
| return null; |
| } |
| |
| @Override |
| public LeafReader reader() { |
| return reader; |
| } |
| |
| @Override |
| public String toString() { |
| return "LeafReaderContext(" + reader + " docBase=" + docBase + " ord=" + ord + ")"; |
| } |
| } |