1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package gc.g1.plab.lib; 24 25 import java.util.Collection; 26 import java.util.HashMap; 27 import java.util.List; 28 import java.util.Map; 29 import java.util.stream.Collectors; 30 import java.util.stream.Stream; 31 32 public class PlabInfo { 33 34 private final Map<String, Long> plabInfo; 35 36 public PlabInfo() { 37 plabInfo = new HashMap<>(); 38 } 39 40 private PlabInfo(Map<String, Long> map) { 41 plabInfo = new HashMap<>(map); 42 } 43 44 /** 45 * Add key and value to underlying Map. 46 * @param key PLAB info field name 47 * @param value PLAB info value for field 48 */ 49 public void put(String key, long value) { 50 plabInfo.put(key, value); 51 } 52 53 /** 54 * Get stream of Map.Entry representing underlying Map with PLAB information. 55 */ 56 public Stream<Map.Entry<String, Long>> entryStream() { 57 return plabInfo.entrySet().stream(); 58 } 59 60 /** 61 * Returns the PlabInfo narrowed for the given fields only 62 * @param fields 63 * @return PlabInfo 64 */ 65 public PlabInfo filter(List<String> fields) { 66 return new PlabInfo(entryStream() 67 .filter(field -> fields.contains(field.getKey())) 68 .collect(Collectors.toMap( 69 item -> item.getKey(), 70 item -> item.getValue()) 71 ) 72 ); 73 } 74 75 /** 76 * Checks if statistic contains expected fields. 77 * @param fields fields which should be in statistic 78 * @return true if all fields are in statistic, false otherwise 79 */ 80 public boolean checkFields(List<String> fields) { 81 for (String key : fields) { 82 if (!plabInfo.containsKey(key)) { 83 return false; 84 } 85 } 86 return true; 87 } 88 89 /** 90 * Return a collection of the values. 91 * @return collection of values 92 */ 93 public Collection<Long> values() { 94 return plabInfo.values(); 95 } 96 97 /** 98 * Get value for specified field. 99 * @param field 100 * @return long value which is contained in specified field 101 */ 102 public long get(String field) { 103 return plabInfo.get(field); 104 } 105 }