1 /* 2 * Copyright (c) 2016, 2019, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.management.jfr; 27 /** 28 * Helper class for generating toString() 29 * 30 */ 31 final class Stringifier { 32 private final StringBuilder sb = new StringBuilder(); 33 private boolean first = true; 34 35 public void add(String name, Object value) { 36 if (first) { 37 first = false; 38 } else { 39 sb.append(" "); 40 } 41 boolean isString = value instanceof String; 42 sb.append(name).append("="); 43 if (value == null) { 44 sb.append("null"); 45 } else { 46 if (isString) { 47 sb.append("\""); 48 } 49 sb.append(value); 50 if (isString) { 51 sb.append("\""); 52 } 53 } 54 } 55 56 @Override 57 public String toString() { 58 return sb.toString(); 59 } 60 }