Github user blackdrag commented on a diff in the pull request:
https://github.com/apache/groovy/pull/811#discussion_r225298000
--- Diff: src/main/java/org/codehaus/groovy/vmplugin/v9/Java9.java ---
@@ -18,14 +18,78 @@
*/
package org.codehaus.groovy.vmplugin.v9;
+import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.vmplugin.v8.Java8;
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
/**
- * Java 9 based functions will be added here if needed.
+ * Additional Java 9 based functions will be added here as needed.
*/
public class Java9 extends Java8 {
+
+ private static class LookupHolder {
+ private static final Method PRIVATE_LOOKUP;
+ private static final Constructor<MethodHandles.Lookup>
LOOKUP_Constructor;
+ static {
+ Constructor<MethodHandles.Lookup> lookup = null;
+ Method privateLookup = null;
+ try { // java 9
+ privateLookup =
MethodHandles.class.getMethod("privateLookupIn", Class.class,
MethodHandles.Lookup.class);
+ } catch (final NoSuchMethodException e) { // java 8
+ try {
+ lookup =
MethodHandles.Lookup.class.getDeclaredConstructor(Class.class, Integer.TYPE);
+ if (!lookup.isAccessible()) {
--- End diff --
we can actually not rely on this being accessible... I am missing the
IllegalAccessException and InaccessibleObjectException handling here...
---
