public JVMInfo getDefaultJVM()
{
JVMInfo defaultJVM = new JVMInfo();
Process defJVM = new Process()
{
StartInfo = new ProcessStartInfo()
{
FileName = "java",
Arguments = "-version",
RedirectStandardError = true,
UseShellExecute = false
}
};
defJVM.Start();
string output = defJVM.StandardError.ReadToEnd();
defJVM.WaitForExit();
Regex verMatcher = new Regex("version \"(.+)\"");
Match result = verMatcher.Match(output);
if (result.Success)
{
defaultJVM.Exist = true;
defaultJVM.Path = "";
defaultJVM.Version = new JVMVersion(result.Groups[1].Value);
}
return(defaultJVM);
}
public List <JVMInfo> GetAllRegisteredJVM()
{
var jvms = new List <JVMInfo>();
var hkey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\JavaSoft");
string[] keys = hkey.GetSubKeyNames();
var jvmLists = new Regex("(JDK)|(JRE)|(Java Runtime Environment)|(Java Development Kit)");
foreach (string key in keys)
{
if (!jvmLists.Match(key).Success)
{
continue;
}
var registeredJVMs = hkey.OpenSubKey(key);
foreach (string jvm in registeredJVMs.GetSubKeyNames())
{
var info = new JVMInfo()
{
Exist = true,
Path = (string)registeredJVMs.OpenSubKey(jvm).GetValue("JavaHome"),
Version = new JVMVersion(jvm)
};
if (info.Version == new JVMVersion(0, 0, 0, 0))
{
continue;
}
jvms.Add(info);
}
}
jvms.Sort(delegate(JVMInfo lhs, JVMInfo rhs)
{
if (lhs.Version > rhs.Version)
{
return(1);
}
else if (lhs.Version < rhs.Version)
{
return(-1);
}
else
{
return(0);
}
});
return(jvms);
}
public JVMInfo GetPrefferedJVM(CoreConfig coreConfig)
{
if (coreConfig.BundledJVM)
{
string pwd = Assembly.GetExecutingAssembly().Location;
pwd = Path.GetDirectoryName(pwd);
var bundledJVM = new JVMInfo
{
Exist = true,
Path = $"{pwd}\\runtime",
Version = JVMVersion.EMPTY
};
return(bundledJVM);
}
if (coreConfig.SearchPath.Registry)
{
List <JVMInfo> registeredJVMs = GetAllRegisteredJVM();
if (coreConfig.Version.Min == null || coreConfig.Version.Max == null)
{
return(registeredJVMs.LastOrDefault());
}
var selectedJvm = from jvm in registeredJVMs
where jvm.Version >= coreConfig.Version.Min &&
jvm.Version <= coreConfig.Version.Max
select jvm;
return(selectedJvm.LastOrDefault());
}
if (coreConfig.SearchPath.CmdDefault)
{
JVMInfo defaultJvm = getDefaultJVM();
if (coreConfig.Version.Min == null || defaultJvm.Version >= coreConfig.Version.Min)
{
if (coreConfig.Version.Max == null || coreConfig.Version.Max <= defaultJvm.Version)
{
return(defaultJvm);
}
}
}
return(null);
}
public void Launch(LaunchType launchType, string[] args = null)
{
this.launchType = launchType;
this.args = args;
var verHandler = new JVMVersionHandler();
var reader = new ConfigReader();
launcherConfig = reader.Config;
selectedJVM = verHandler.GetPrefferedJVM(launcherConfig.Launcher);
if (selectedJVM == null)
{
Console.WriteLine("no prefered jvm found");
return;
}
LaunchApp();
}