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Code Issues Pull Requests 1 Releases Wiki Activity

Check for both the 32- and 64-bit versions of Java (fixes #2)

This commit is contained in:
Sam Harwell 2013-03-11 21:46:45 -05:00
parent c9d8fceeb7
commit f494410681
1 changed files with 37 additions and 5 deletions
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42
runtime/CSharp/Antlr4BuildTasks/Antlr4ClassGenerationTaskInternal.cs
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@ -137,12 +137,44 @@ namespace Antlr4.Build.Tasks
{
get
{
string javaKey = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
using (var baseKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Default).OpenSubKey(javaKey))
string javaHome;
if (TryGetJavaHome(RegistryView.Default, out javaHome))
return javaHome;
if (TryGetJavaHome(RegistryView.Registry64, out javaHome))
return javaHome;
if (TryGetJavaHome(RegistryView.Registry32, out javaHome))
return javaHome;
throw new NotSupportedException("Could not locate a Java installation.");
}
}
private bool TryGetJavaHome(RegistryView registryView, out string javaHome)
{
javaHome = null;
string javaKeyName = "SOFTWARE\\JavaSoft\\Java Runtime Environment";
using (var baseKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Default))
{
using (RegistryKey javaKey = baseKey.OpenSubKey(javaKeyName))
{
string currentVersion = baseKey.GetValue("CurrentVersion").ToString();
using (var homeKey = baseKey.OpenSubKey(currentVersion))
return homeKey.GetValue("JavaHome").ToString();
if (javaKey == null)
return false;
object currentVersion = javaKey.GetValue("CurrentVersion");
if (currentVersion == null)
return false;
using (var homeKey = javaKey.OpenSubKey(currentVersion.ToString()))
{
if (homeKey == null || homeKey.GetValue("JavaHome") == null)
return false;
javaHome = homeKey.GetValue("JavaHome").ToString();
return !string.IsNullOrEmpty(javaHome);
}
}
}
}