Index: drools-core/src/main/java/org/codehaus/jfdi/interpreter/ClassTypeResolver.java
===================================================================
--- drools-core/src/main/java/org/codehaus/jfdi/interpreter/ClassTypeResolver.java	(revision 9410)
+++ drools-core/src/main/java/org/codehaus/jfdi/interpreter/ClassTypeResolver.java	(working copy)
@@ -115,6 +115,32 @@
             clazz =  float.class;
         } else if ( "double".equals( className ) ) {
             clazz =  double.class;
+            // Could also be a primitive array
+        } else if ( "boolean[]".equals( className) ) {
+            clazz = boolean[].class;
+        } else if ( "byte[]".equals( className ) ) {
+            clazz =  byte[].class;
+        } else if ( "short[]".equals( className ) ) {
+            clazz =  short[].class;
+        } else if ( "char[]".equals( className ) ) {
+            clazz =  char[].class;
+        } else if ( "int[]".equals( className ) ) {
+            clazz =  int[].class;
+        } else if ( "long[]".equals( className ) ) {
+            clazz =  long[].class;
+        } else if ( "float[]".equals( className ) ) {
+            clazz =  float[].class;
+        } else if ( "double[]".equals( className ) ) {
+            clazz =  double[].class;
+            // Could be primitive array of objects
+        } else if ( className.endsWith("[]") ) {
+            String componentName = className.substring(0, className.length( ) -2 );
+            String arrayClassName = new StringBuffer().append("[L").append(componentName).append(";").toString();
+            try {
+                clazz = Class.forName(arrayClassName);
+            } catch (ClassNotFoundException e) {
+                clazz = null;
+            }
         }
         
         if( clazz == null ) {