Fixed empty-sample-secure.groovy to work with COMPILE_STATIC (#3262)

Fixed empty-sample-secure.groovy script to work with GroovyCompilerGremlinPlugin Compilation.COMPILE_STATIC which has stricter type checking by using explicit map type declaration and casting of map entry values. Otherwise the server will fail to start when using gremlin-server-secure.yaml config sample.

Author: andreachild

CHANGELOG.asciidoc

@@ -31,6 +31,7 @@ image::https://raw.githubusercontent.com/apache/tinkerpop/master/docs/static/ima
 * Improved GLV examples reliability and documentation with step-by-step instructions.
 * Added root-level GLV examples in `gremlin-examples/` directory that use published driver versions for easy out-of-the-box usage, separate from module-level examples that use local development code.
 * Bump netty to 4.1.125.Final
+* Fixed `empty-sample-secure.groovy` to work with `Compilation.COMPILE_STATIC`
 
 [[release-3-7-4]]
 === TinkerPop 3.7.4 (Release Date: August 1, 2025)

gremlin-server/scripts/empty-sample-secure.groovy

@@ -31,20 +31,20 @@
 def addItUp(int x, int y) { x + y }
 
 // an init script that returns a Map allows explicit setting of global bindings.
-def globals = [:]
+def Map<Object, Object> globals = [:]
 
 // defines a sample LifeCycleHook that prints some output to the Gremlin Server console.
 // note that the name of the key in the "global" map is unimportant. As this script,
 // runs as part of a sandbox configuration, type-checking is enabled and thus the
 // LifeCycleHook type needs to be defined for the "ctx" variable.
-globals << [hook : [
+globals << ([hook : [
   onStartUp: { LifeCycleHook.Context ctx ->
     ctx.logger.info("Executed once at startup of Gremlin Server.")
   },
   onShutDown: { LifeCycleHook.Context ctx ->
     ctx.logger.info("Executed once at shutdown of Gremlin Server.")
   }
-] as LifeCycleHook]
+] as LifeCycleHook] as Map<Object, Object>)
 
 // define the default TraversalSource to bind queries to - this one will be named "g".
 // ReferenceElementStrategy converts all graph elements (vertices/edges/vertex properties)
@@ -55,4 +55,4 @@ globals << [hook : [
 //
 // must use an instance of ReferenceElementStrategy as Groovy shorthands won't work with
 // secure script execution.
-globals << [g : traversal().withEmbedded(graph).withStrategies(ReferenceElementStrategy.instance())]
+globals << ([g : traversal().withEmbedded(graph).withStrategies(ReferenceElementStrategy.instance())] as Map<Object, Object>)