1 files changed, 46 insertions, 0 deletions
diff --git a/src/main/java/com/btr/proxy/selector/pac/ScriptAvailability.java b/src/main/java/com/btr/proxy/selector/pac/ScriptAvailability.java
new file mode 100644
index 0000000..d7f6e04
--- /dev/null
+++ b/src/main/java/com/btr/proxy/selector/pac/ScriptAvailability.java
@@ -0,0 +1,46 @@
+package com.btr.proxy.selector.pac;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/****************************************************************************
+ * Utility to check availablility of javax.script
+ * 
+ * @author Bernd Rosstauscher (proxyvole@rosstauscher.de) Copyright 2009
+ ***************************************************************************/
+abstract class ScriptAvailability {
+	
+	/*************************************************************************
+	 * Checks whether javax.script is available or not.
+	 * Completely done per Reflection to allow compilation under Java 1.5
+	 * @return true if javax.script is available; false otherwise
+	 ************************************************************************/
+	public static boolean isJavaxScriptingAvailable() {
+		Object engine = null;
+		try {
+			Class<?> managerClass = Class.forName("javax.script.ScriptEngineManager");
+			Method m = managerClass.getMethod("getEngineByMimeType", String.class);
+			engine = m.invoke(managerClass.newInstance(), "text/javascript");
+		} catch (ClassNotFoundException e) {
+			// javax.script not available
+		} catch (NoSuchMethodException e) {
+			// javax.script not available
+		} catch (IllegalAccessException e) {
+			// javax.script not available
+		} catch (InvocationTargetException e) {
+			// javax.script not available
+		} catch (InstantiationException e) {
+			// javax.script not available
+		}
+
+		return engine != null;
+	}
+
+	/*************************************************************************
+	 * Constructor
+	 ************************************************************************/
+	
+	ScriptAvailability() {
+		super();
+	}
+}