| package org.apache.lucene.index; |
| |
| /* |
| * 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. |
| */ |
| |
| /** |
| * Extension of {@link SortedSetDocValues} that supports random access |
| * to the ordinals of a document. |
| * <p> |
| * Operations via this API are independent of the iterator api ({@link #nextOrd()}) |
| * and do not impact its state. |
| * <p> |
| * Codecs can optionally extend this API if they support constant-time access |
| * to ordinals for the document. |
| */ |
| public abstract class RandomAccessOrds extends SortedSetDocValues { |
| |
| /** Sole constructor. (For invocation by subclass |
| * constructors, typically implicit.) */ |
| protected RandomAccessOrds() {} |
| |
| /** |
| * Retrieve the ordinal for the current document (previously |
| * set by {@link #setDocument(int)} at the specified index. |
| * <p> |
| * An index ranges from {@code 0} to {@code cardinality()-1}. |
| * The first ordinal value is at index {@code 0}, the next at index {@code 1}, |
| * and so on, as for array indexing. |
| * @param index index of the ordinal for the document. |
| * @return ordinal for the document at the specified index. |
| */ |
| public abstract long ordAt(int index); |
| |
| /** |
| * Returns the cardinality for the current document (previously |
| * set by {@link #setDocument(int)}. |
| */ |
| public abstract int cardinality(); |
| } |