Implement dynamic version injection from pom.xml

- Create version.properties resource file with Maven placeholders
- Enable Maven resource filtering for version.properties
- Add VSVersionInfo utility class to read version at runtime
- Update VSDefaultPrefs to use dynamic version instead of hardcoded
- Version now shows "Distributed Systems Simulator 1.0.1-SNAPSHOT"
- Includes build timestamp for better traceability

The version in the title bar is now automatically updated from the
pom.xml version during the build process.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

1 files changed, 108 insertions, 0 deletions

diff --git a/src/main/java/utils/VSVersionInfo.java b/src/main/java/utils/VSVersionInfo.java
new file mode 100644
index 0000000..24b9461
--- /dev/null
+++ b/src/main/java/utils/VSVersionInfo.java
@@ -0,0 +1,108 @@
+package utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Properties;
+
+/**
+ * Provides version information for the application.
+ * This class reads version details from a properties file that is
+ * populated at build time by Maven resource filtering.
+ * 
+ * @author Paul C. Buetow
+ */
+public final class VSVersionInfo {
+    
+    private static final String VERSION_FILE = "/version.properties";
+    private static final Properties versionProps = new Properties();
+    private static boolean loaded = false;
+    
+    /** Private constructor to prevent instantiation */
+    private VSVersionInfo() {}
+    
+    /**
+     * Loads version properties from the resource file.
+     * This method is called automatically on first access.
+     */
+    private static synchronized void loadProperties() {
+        if (loaded) {
+            return;
+        }
+        
+        try (InputStream is = VSVersionInfo.class.getResourceAsStream(VERSION_FILE)) {
+            if (is != null) {
+                versionProps.load(is);
+                loaded = true;
+            } else {
+                // Fallback values if properties file not found
+                versionProps.setProperty("app.version", "Unknown");
+                versionProps.setProperty("app.name", "DS-Sim");
+                versionProps.setProperty("app.description", "Distributed Systems Simulator");
+                loaded = true;
+            }
+        } catch (IOException e) {
+            // Fallback values on error
+            versionProps.setProperty("app.version", "Unknown");
+            versionProps.setProperty("app.name", "DS-Sim");
+            versionProps.setProperty("app.description", "Distributed Systems Simulator");
+            loaded = true;
+        }
+    }
+    
+    /**
+     * Gets the application version from Maven project version.
+     * 
+     * @return the version string (e.g., "1.0.1-SNAPSHOT")
+     */
+    public static String getVersion() {
+        if (!loaded) {
+            loadProperties();
+        }
+        return versionProps.getProperty("app.version", "Unknown");
+    }
+    
+    /**
+     * Gets the application name from Maven project name.
+     * 
+     * @return the application name
+     */
+    public static String getName() {
+        if (!loaded) {
+            loadProperties();
+        }
+        return versionProps.getProperty("app.name", "DS-Sim");
+    }
+    
+    /**
+     * Gets the application description from Maven project description.
+     * 
+     * @return the application description
+     */
+    public static String getDescription() {
+        if (!loaded) {
+            loadProperties();
+        }
+        return versionProps.getProperty("app.description", "Distributed Systems Simulator");
+    }
+    
+    /**
+     * Gets the build timestamp.
+     * 
+     * @return the build timestamp or "Unknown" if not available
+     */
+    public static String getBuildTimestamp() {
+        if (!loaded) {
+            loadProperties();
+        }
+        return versionProps.getProperty("build.timestamp", "Unknown");
+    }
+    
+    /**
+     * Gets the full version string including name and version.
+     * 
+     * @return formatted version string (e.g., "Distributed Systems Simulator 1.0.1-SNAPSHOT")
+     */
+    public static String getFullVersionString() {
+        return String.format("Distributed Systems Simulator %s", getVersion());
+    }
+}
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