1 /* 2 * Copyright (c) 2014, 2015, Dynatrace and/or its affiliates. All rights reserved. 3 * 4 * This file is part of the Lock Contention Tracing Subsystem for the HotSpot 5 * Virtual Machine, which is developed at Christian Doppler Laboratory on 6 * Monitoring and Evolution of Very-Large-Scale Software Systems. Please 7 * contact us at <http://mevss.jku.at/> if you need additional information 8 * or have any questions. 9 * 10 * This code is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 only, as 12 * published by the Free Software Foundation. 13 * 14 * This code is distributed in the hope that it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 17 * version 2 for more details (a copy is included in the LICENSE file that 18 * accompanied this code). 19 * 20 * You should have received a copy of the GNU General Public License version 21 * 2 along with this work. If not, see <http://www.gnu.org/licenses/>. 22 * 23 */ 24 package sun.evtracing.parser.metadata; 25 26 public class MetadataRef<T> { 27 28 private final long identifier; 29 private T metadata; 30 31 public MetadataRef(long identifier) { 32 this(identifier, null); 33 } 34 35 public MetadataRef(long identifier, T metadata) { 36 this.identifier = identifier; 37 this.metadata = metadata; 38 } 39 40 public long identifier() { 41 return identifier; 42 } 43 44 public T metadata() { 45 return metadata; 46 } 47 48 public void setMetadata(T metadata) { 49 assert (this.metadata == null) : "set only allowed once"; 50 this.metadata = metadata; 51 } 52 53 }