feat: implement calling static boolean methods

Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>

gojni.h

@@ -23,6 +23,7 @@ __attribute__ ((visibility ("hidden"))) void _jni_DeleteGlobalRef(JNIEnv *env, j
 __attribute__ ((visibility ("hidden"))) jobject _jni_NewLocalRef(JNIEnv *env, jobject obj);
 __attribute__ ((visibility ("hidden"))) void _jni_DeleteLocalRef(JNIEnv *env, jobject obj);
 __attribute__ ((visibility ("hidden"))) jint _jni_CallStaticIntMethodA(JNIEnv *env, jclass cls, jmethodID method, jvalue *args);
+__attribute__ ((visibility ("hidden"))) jboolean _jni_CallStaticBooleanMethodA(JNIEnv *env, jclass cls, jmethodID method, jvalue *args);
 __attribute__ ((visibility ("hidden"))) jobject _jni_CallStaticObjectMethodA(JNIEnv *env, jclass cls, jmethodID method, jvalue *args);
 __attribute__ ((visibility ("hidden"))) jobject _jni_NewObjectA(JNIEnv *env, jclass cls, jmethodID method, jvalue *args);
 __attribute__ ((visibility ("hidden"))) void _jni_CallStaticVoidMethodA(JNIEnv *env, jclass cls, jmethodID method, jvalue *args);

jni.c

@@ -118,6 +118,10 @@ jint _jni_CallStaticIntMethodA(JNIEnv *env, jclass cls, jmethodID method, jvalue
 	return (*env)->CallStaticIntMethodA(env, cls, method, args);
 }
 
+jint _jni_CallStaticBooleanMethodA(JNIEnv *env, jclass cls, jmethodID method, jvalue *args) {
+	return (*env)->CallStaticBooleanMethodA(env, cls, method, args);
+}
+
 jobject _jni_CallStaticObjectMethodA(JNIEnv *env, jclass cls, jmethodID method, jvalue *args) {
 	return (*env)->CallStaticObjectMethodA(env, cls, method, args);
 }

jni.go

@@ -102,6 +102,12 @@ func CallStaticIntMethod(e Env, cls Class, method MethodID, args ...Value) (int,
 	return int(res), exception(e)
 }
 
+// CallStaticBooleanMethod calls a static method on a Java class, returning an int.
+func CallStaticBooleanMethod(e Env, cls Class, method MethodID, args ...Value) (bool, error) {
+	res := C._jni_CallStaticBooleanMethodA(e.env, C.jclass(cls), C.jmethodID(method), varArgs(args))
+	return res == TRUE, exception(e)
+}
+
 // FindClass returns a reference to a Java class with a given name, using the
 // JVM's default class loader. Any exceptions caused by the underlying JNI call
 // (for example if the class is not found) will result in a panic.

jni_test.go

@@ -122,6 +122,41 @@ func TestStaticIntMethod(t *testing.T) {
 	}
 }
 
+func TestStaticBooleanMethod(t *testing.T) {
+	err := Do(vm, func(env Env) error {
+		cls := FindClass(env, "test/AClass")
+		mid := GetStaticMethodID(env, cls, "GetStaticBoolean", "()Z")
+		if mid == nil {
+			t.Errorf("MethodID is nil")
+		}
+		setterMid := GetStaticMethodID(env, cls, "SetStaticBoolean", "(Z)V")
+		if setterMid == nil {
+			t.Errorf("Setter MethodID is nil")
+		}
+		res, err := CallStaticBooleanMethod(env, cls, mid)
+		if err != nil {
+			t.Errorf("Method invocation failed")
+		}
+		if !res {
+			t.Errorf("Method returned %v, not expected value of %v.", res, true)
+		}
+		if err := CallStaticVoidMethod(env, cls, setterMid, FALSE); err != nil {
+			t.Errorf("Setter invocation failed")
+		}
+		res, err = CallStaticBooleanMethod(env, cls, mid)
+		if err != nil {
+			t.Errorf("Method invocation failed")
+		}
+		if res {
+			t.Errorf("Method returned %v, not expected value of %v.", res, false)
+		}
+		return err
+	})
+	if err != nil {
+		t.Errorf("Error: %s", err)
+	}
+}
+
 func TestIntMethod(t *testing.T) {
 	err := Do(vm, func(env Env) error {
 		cls := FindClass(env, "test/AClass")

test/AClass.java

@@ -2,6 +2,7 @@ package test;
 
 public class AClass {
 	public static int staticintval = 100;
+	public static boolean staticboolval = true;
 
 	public int intval = 0;
 
@@ -9,10 +10,18 @@ public class AClass {
 		return staticintval;
 	}
 
+	public static boolean GetStaticBoolean() {
+		return staticboolval;
+	}
+
 	public static void SetStaticInt(int val) {
 		staticintval = val;
 	}
 
+	public static void SetStaticBoolean(boolean val) {
+		staticboolval = val;
+	}
+
 	public void IncInt() {
 		intval = intval + 1;
 	}