| package org.apache.helix; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.List; |
| |
| /** |
| * Constructs ZNRecords from collections of ZNRecords |
| */ |
| public class ZNRecordAssembler { |
| /** |
| * Merge a list of ZNRecords into a single ZNRecord |
| * @param records |
| * @return {@link ZNRecord} |
| */ |
| public ZNRecord assemble(List<ZNRecord> records) { |
| ZNRecord assembledRecord = null; |
| if (records != null && records.size() > 0) { |
| for (ZNRecord record : records) { |
| if (record == null) { |
| continue; |
| } |
| |
| if (assembledRecord == null) { |
| assembledRecord = new ZNRecord(record.getId()); |
| } |
| |
| assembledRecord.merge(record); |
| } |
| } |
| return assembledRecord; |
| } |
| |
| } |