fix JNIObject.getField

Author: rikner

Sources/JNI/JNIFields.swift

@@ -26,15 +26,12 @@ public extension JNI {
         return try T.fromField(fieldID!, on: javaObject)
     }
 
-    func GetField<T: JavaInitializableFromField & JavaParameterConvertible>(
-        _ fieldName: String,
-        javaClass: JavaClass,
-        from javaObject: JavaObject
-    ) throws -> T {
+    func GetField(_ fieldName: String, fieldJavaClassName: String, from javaObject: JavaObject) throws -> JavaObject {
         let env = self._env
-        let fieldID = env.pointee.pointee.GetFieldID(env, javaClass, fieldName, T.asJNIParameterString)
+        let javaClass = try GetObjectClass(obj: javaObject)
+        let fieldID = env.pointee.pointee.GetFieldID(env, javaClass, fieldName, "L\(fieldJavaClassName);")
         try checkAndThrowOnJNIError()
-        return try T.fromField(fieldID!, on: javaObject)
+        return try JavaObject.fromField(fieldID!, on: javaObject)
     }
 }
 

Sources/JNI/JNIObjects.swift

@@ -87,11 +87,8 @@ open class JNIObject {
         return try jni.GetField(fieldName, from: self.instance)
     }
 
-    public func getField<T: JavaInitializableFromField & JavaParameterConvertible>(
-        _ fieldName: String,
-        javaClass: JavaClass
-    ) throws -> T {
-        return try jni.GetField(fieldName, javaClass: javaClass, from: self.instance)
+    public func getField(_ fieldName: String, fieldJavaClassName: String) throws -> JavaObject {
+        return try jni.GetField(fieldName, fieldJavaClassName: fieldJavaClassName, from: self.instance)
     }
 
     public static func callStatic(methodName: String, arguments: [JavaParameterConvertible] = []) throws {