| /* |
| * 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 org.apache.lucene.util.Bits; |
| import org.apache.lucene.util.FutureObjects; |
| |
| |
| /** |
| * Exposes a slice of an existing Bits as a new Bits. |
| * |
| * @lucene.internal |
| */ |
| final class BitsSlice implements Bits { |
| private final Bits parent; |
| private final int start; |
| private final int length; |
| |
| // start is inclusive; end is exclusive (length = end-start) |
| public BitsSlice(Bits parent, ReaderSlice slice) { |
| this.parent = parent; |
| this.start = slice.start; |
| this.length = slice.length; |
| assert length >= 0: "length=" + length; |
| } |
| |
| @Override |
| public boolean get(int doc) { |
| FutureObjects.checkIndex(doc, length); |
| return parent.get(doc+start); |
| } |
| |
| @Override |
| public int length() { |
| return length; |
| } |
| } |