Add RuntimeUtils#setDebugMode to configure debug logging

closes shannah#38

Author: DJtheRedstoner

src/main/java/ca/weblite/objc/RuntimeUtils.java

@@ -1093,6 +1093,12 @@ public static ByReference getAsReferenceWrapper(Object val, String signature){
      */
     public static native Recipient getJavaPeer(long nsObject);
 
-    
+    /**
+     * Configures debug logging. Even if debug logging is disabled, exceptions
+     * will still be printed when they occur.
+     * 
+     * @param debugMode whether debug mode should be enabled
+     */
+    public static native void setDebugMode(boolean debugMode);
 
 }

src/main/objectivec/implementation/WLJavaProxy.h

@@ -18,6 +18,7 @@
 
 }
 +(void)setJVM:(JavaVM*)theJvm;
++(void)setDebugMode:(bool)debugMode;
 -(WLJavaProxy*)init:(jobject)peer;
 -(NSMethodSignature*)methodSignatureForSelector:(SEL)sel;
 -(void)forwardInvocation:(NSInvocation *)invocation;

src/main/objectivec/implementation/WLJavaProxy.m

@@ -10,6 +10,7 @@
 #include "JavaUtil.h"
 
 static JavaVM *jvm = NULL;
+static bool debugMode = false;
 
 unsigned long acceptNSRange(NSRange range) {
     return range.length + range.location;
@@ -123,23 +124,27 @@ -(NSMethodSignature*)methodSignatureForSelector:(SEL)sel
 //    return [NSMethodSignature methodSignatureForSelector:sel];
 }
 
+#ifndef logIfDebug
+#define logIfDebug(args...) if(debugMode) { NSLog(args); }
+#endif
+
 -(void)forwardInvocation:(NSInvocation *)invocation
 {
-    NSLog(@"forwardInvocation: %@", invocation);
+    logIfDebug(@"forwardInvocation: %@", invocation);
 
     JNIEnv *env=0;
     SEL aSelector = [invocation selector];
     int attach = (*jvm)->AttachCurrentThread(jvm, (void**)&env, NULL);
 
     @try {
         if ( attach == 0 ) {
-            NSLog(@"Before CallBooleanMethod");
+            logIfDebug(@"Before CallBooleanMethod");
 
             //JNF_COCOA_ENTER(env);
             (*env)->CallVoidMethod(env, peer, jForwardInvocation, invocation);
             //JNF_COCOA_EXIT(env);
 
-            NSLog(@"After CallBooleanMethod");
+            logIfDebug(@"After CallBooleanMethod");
         }
         //(*jvm)->DetachCurrentThread(jvm);
     } @catch (NSException *e) {
@@ -267,4 +272,8 @@ - (id)forwardInvocationForSelector: (SEL)aSelector withTarget: (id _Nullable)aTa
     return nil;
 }
 
++(void)setDebugMode:(bool)_debugMode {
+    debugMode = _debugMode;
+}
+
 @end

src/main/objectivec/implementation/jnaexample_NativeClient_Setup.h

@@ -71,6 +71,12 @@ void exceptionHandler(NSException *exception)
     }
 }
 
+JNIEXPORT void JNICALL Java_ca_weblite_objc_RuntimeUtils_setDebugMode
+(JNIEnv *env, jclass cls, jboolean debugMode)
+{
+    [WLJavaProxy setDebugMode:debugMode];
+}
+
 /*
 JNIEXPORT jobject JNICALL Java_ca_weblite_objc_RuntimeUtils_invokeWithSelfAndTarget
 (JNIEnv *env, jclass jcls, jlong selfPtr, jlong target, jlong invocation)

src/main/objectivec/implementation/jnaexample_NativeClient_Setup.m

@@ -119,6 +119,17 @@ public void testCustomClass(){
         myObj = cls.sendProxy("getMyObj");
         assertEquals(array, myObj);
     }
+
+    @Test
+    public void debugModeTest() {
+        setDebugMode(true);
+        TestCustomClass cls = new TestCustomClass();
+        cls.init("NSObject");
+        cls.send("myCustomString");
+        setDebugMode(false);
+        cls.send("myCustomString");
+        System.out.println("Exactly one set of debug logs should be printed above");
+    }
 
     public static class TestCustomClass extends NSObject {
         private String str = "My custom string";