[client] fix version detection for all jres

1 files changed, 19 insertions, 2 deletions

diff --git a/dozentenmodul/src/main/java/models/Version.java b/dozentenmodul/src/main/java/models/Version.java
index a5eafe6d..b63e5e6e 100644
--- a/dozentenmodul/src/main/java/models/Version.java
+++ b/dozentenmodul/src/main/java/models/Version.java
@@ -1,7 +1,11 @@
 package models;
 
+import java.io.IOException;
 import java.io.InputStream;
+import java.net.URL;
 import java.util.Properties;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
 
 public class Version {
 
@@ -11,15 +15,28 @@ public class Version {
 		// Maven writes a version number derived from the current timestamp
 		// to MANIFEST.MF - read it
 		if (version == null) {
+			JarFile jf = null;
 			try {
-				InputStream is = Version.class
-						.getResourceAsStream("/META-INF/MANIFEST.MF");
+		        String classPath = Version.class.getName().replace('.', '/') + ".class";
+		        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+		        URL classPathUrl = classLoader.getResource(classPath);
+		        String jarPath = classPathUrl.getPath().replaceAll("![^!]*$", "").replaceAll("^(file:|jar:)*", "");
+		        jf = new JarFile(jarPath);
+		        JarEntry je = jf.getJarEntry("META-INF/MANIFEST.MF");
+		        InputStream is = jf.getInputStream(je);
 				Properties p = new Properties();
 				p.load(is);
 				version = p.getProperty("Version-Timestamp");
 			} catch (Exception e) {
 				e.printStackTrace();
 				version = "unknown";
+			} finally {
+				if (jf != null)
+					try {
+						jf.close();
+					} catch (IOException e) {
+
+					}
 			}
 		}
 		return version;