API Enhancements: JNI.GetDirectBufferAddress() and JNIObject.getField() (#18)

Author: rikner

Sources/JNI/JNI.swift

@@ -64,4 +64,9 @@ public extension JNI {
         let env = self._env
         return env.pointee.pointee.MonitorExit(env, obj)
     }
+
+    func GetDirectBufferAddress(buffer: JavaObject) -> UnsafeMutableRawPointer? {
+        let env = self._env
+        return env.pointee.pointee.GetDirectBufferAddress(env, buffer)
+    }
 }

Sources/JNI/JNIFields.swift

@@ -25,6 +25,17 @@ public extension JNI {
         try checkAndThrowOnJNIError()
         return try T.fromField(fieldID!, on: javaObject)
     }
+
+    func GetField(_ fieldName: String, fieldJavaClassName: String, from javaObject: JavaObject) throws -> JavaObject {
+        let env = self._env
+        let javaClass = try GetObjectClass(obj: javaObject)
+        defer {
+            jni.DeleteLocalRef(javaClass)
+        }
+        let fieldID = env.pointee.pointee.GetFieldID(env, javaClass, fieldName, "L\(fieldJavaClassName);")
+        try checkAndThrowOnJNIError()
+        return try JavaObject.fromField(fieldID!, on: javaObject)
+    }
 }
 
 

Sources/JNI/JNIObjects.swift

@@ -87,6 +87,10 @@ open class JNIObject {
         return try jni.GetField(fieldName, 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 {
         try jni.callStatic(methodName, on: self.javaClass, arguments: arguments)
     }