From d7bc10d7ff0e3a30d74c4e4c439230f3983bcfb4 Mon Sep 17 00:00:00 2001
From: Mathieu Féry <mfery@ankama.com>
Date: Thu, 15 Jun 2023 18:03:13 +0200
Subject: feat(jni): Add directive for dedicated JNI Code with CustomJNICode

---
 src/java/com/jogamp/gluegen/JavaEmitter.java | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'src/java/com/jogamp/gluegen/JavaEmitter.java')

diff --git a/src/java/com/jogamp/gluegen/JavaEmitter.java b/src/java/com/jogamp/gluegen/JavaEmitter.java
index ada1ce9..733f12a 100644
--- a/src/java/com/jogamp/gluegen/JavaEmitter.java
+++ b/src/java/com/jogamp/gluegen/JavaEmitter.java
@@ -830,7 +830,7 @@ public class JavaEmitter implements GlueEmitter {
     // Note that machDescJava MachineDataInfo is always 64bit unix,
     // which complies w/ Java types.
 
-    boolean needsNativeCode = false;
+    boolean needsNativeCode = !cfg.customJNICodeForClass(containingJTypeName).isEmpty();
 
     // Native code for calls through function pointers gets emitted
     // into the abstract base class; Java code which accesses fields
@@ -1162,6 +1162,7 @@ public class JavaEmitter implements GlueEmitter {
     javaUnit.emitln("}");
     javaUnit.close();
     if (needsNativeCode) {
+      emitCustomJNICode(jniUnit, containingJTypeName);
       jniUnit.close();
     }
     if( GlueGen.debug() ) {
@@ -2524,6 +2525,23 @@ public class JavaEmitter implements GlueEmitter {
     unit.emitln("  // ---- End CustomJavaCode .cfg declarations");
   }
 
+  /**
+   * Emit all the strings specified in the "CustomJNICode" parameters of
+   * the configuration file.
+   */
+  protected void emitCustomJNICode(final CodeUnit unit, final String className) throws Exception  {
+    final List<String> code = cfg.customJNICodeForClass(className);
+    if (code.isEmpty())
+      return;
+
+    unit.emitln();
+    unit.emitln("  // --- Begin CustomJNICode .cfg declarations");
+    for (final String line : code) {
+      unit.emitln(line);
+    }
+    unit.emitln("  // ---- End CustomJNICode .cfg declarations");
+  }
+
   public String[] getClassAccessModifiers(final String classFQName) {
       String[] accessModifiers;
       final MethodAccess acc = cfg.accessControl(classFQName);
-- 
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