| /* |
| * 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.idversion; |
| |
| import org.apache.lucene.index.PostingsEnum; |
| import org.apache.lucene.util.BytesRef; |
| |
| class SinglePostingsEnum extends PostingsEnum { |
| private int doc; |
| private int pos; |
| private int singleDocID; |
| private long version; |
| private final BytesRef payload; |
| |
| public SinglePostingsEnum() { |
| payload = new BytesRef(8); |
| payload.length = 8; |
| } |
| |
| /** For reuse */ |
| public void reset(int singleDocID, long version) { |
| doc = -1; |
| this.singleDocID = singleDocID; |
| this.version = version; |
| } |
| |
| @Override |
| public int nextDoc() { |
| if (doc == -1) { |
| doc = singleDocID; |
| } else { |
| doc = NO_MORE_DOCS; |
| } |
| pos = -1; |
| |
| return doc; |
| } |
| |
| @Override |
| public int docID() { |
| return doc; |
| } |
| |
| @Override |
| public int advance(int target) { |
| if (doc == -1 && target <= singleDocID) { |
| doc = singleDocID; |
| pos = -1; |
| } else { |
| doc = NO_MORE_DOCS; |
| } |
| return doc; |
| } |
| |
| @Override |
| public long cost() { |
| return 1; |
| } |
| |
| @Override |
| public int freq() { |
| return 1; |
| } |
| |
| @Override |
| public int nextPosition() { |
| assert pos == -1; |
| pos = 0; |
| IDVersionPostingsFormat.longToBytes(version, payload); |
| return pos; |
| } |
| |
| @Override |
| public BytesRef getPayload() { |
| return payload; |
| } |
| |
| @Override |
| public int startOffset() { |
| return -1; |
| } |
| |
| @Override |
| public int endOffset() { |
| return -1; |
| } |
| } |