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/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package compiler.compilercontrol.share.scenario;
import compiler.compilercontrol.share.method.MethodDescriptor;
import jdk.test.lib.Utils;
import java.util.List;
import java.util.Random;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* Generates random commands
*/
public class CommandGenerator {
private static final int MAX_COMMANDS = Integer.getInteger(
"compiler.compilercontrol.share.scenario.CommandGenerator.commands",
100);
private static final Random RANDOM = Utils.getRandomInstance();
/**
* Generates random command
*
* @return command
*/
public Command generateCommand() {
return Utils.getRandomElement(Command.values());
}
/**
* Generates random number of random command
*
* @return a list of random commands
*/
public List<Command> generateCommands() {
int amount = 1 + RANDOM.nextInt(MAX_COMMANDS - 1);
return generateCommands(amount);
}
/**
* Generates specified amount of random command
*
* @param amount amount of commands to generate
* @return a list of random commands
*/
public List<Command> generateCommands(int amount) {
return Stream.generate(this::generateCommand)
.limit(amount)
.collect(Collectors.toList());
}
/**
* Generates random compile command {@link CompileCommand} with specified
* command and method descriptor
*
* @param command a command type
* @param md a method descriptor
* @param type a type of the command, or null to generate any
* @return the generated compile command
*/
public CompileCommand generateCompileCommand(Command command,
MethodDescriptor md, Scenario.Type type) {
if (type == null) {
type = Utils.getRandomElement(Scenario.Type.values());
}
return type.createCompileCommand(command, md, generateCompiler());
}
/**
* Generates type of compiler that should be used for the command, or null
* if any or all compilers should be used
*
* @return Compiler value, or null
*/
public Scenario.Compiler generateCompiler() {
Scenario.Compiler[] compilers = Scenario.Compiler.values();
int compiler = RANDOM.nextInt(compilers.length + 1) - 1;
return (compiler != -1) ? compilers[compiler] : null;
}
/**
* Generates random diagnostic command
* {@link Scenario.Type}
*/
public Scenario.JcmdType generateJcmdType() {
return Utils.getRandomElement(Scenario.JcmdType.values());
}
}
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