1 /* 2 * Copyright (c) 2015, 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 24 package compiler.compilercontrol.share.scenario; 25 26 import jdk.test.lib.Utils; 27 28 import java.util.List; 29 import java.util.Random; 30 import java.util.stream.Collectors; 31 import java.util.stream.Stream; 32 33 /** 34 * Generates random commands 35 */ 36 public class CommandGenerator { 37 private static final int MAX_COMMANDS = Integer.getInteger( 38 "compiler.compilercontrol.share.scenario.CommandGenerator.commands", 39 100); 40 private static final Random RANDOM = Utils.getRandomInstance(); 41 42 /** 43 * Generates random command 44 * 45 * @return command 46 */ 47 public Command generateCommand() { 48 return Utils.getRandomElement(Command.values()); 49 } 50 51 /** 52 * Generates random number of random command 53 * 54 * @return a list of random commands 55 */ 56 public List<Command> generateCommands() { 57 int amount = 1 + RANDOM.nextInt(MAX_COMMANDS - 1); 58 return generateCommands(amount); 59 } 60 61 /** 62 * Generates specified amount of random command 63 * 64 * @param amount amount of commands to generate 65 * @return a list of random commands 66 */ 67 public List<Command> generateCommands(int amount) { 68 return Stream.generate(this::generateCommand) 69 .limit(amount) 70 .collect(Collectors.toList()); 71 } 72 73 /** 74 * Generates random type of the scenario 75 * {@link Scenario.Type} 76 */ 77 public Scenario.Type generateCommandType() { 78 return Utils.getRandomElement(Scenario.Type.values()); 79 } 80 81 /** 82 * Generates type of compiler that should be used for the command, or null 83 * if any or all compilers should be used 84 * 85 * @return Compiler value, or null 86 */ 87 public State.Compiler generateCompiler() { 88 State.Compiler[] compilers = State.Compiler.values(); 89 int compiler = RANDOM.nextInt(compilers.length + 1) - 1; 90 return (compiler != -1) ? compilers[compiler] : null; 91 } 92 }