java: fix Java types for ZFM20

Signed-off-by: Petre Eftime <petre.p.eftime@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/zfm20/javaupm_zfm20.i

@@ -4,16 +4,30 @@
 %include "typemaps.i"
 %include "arrays_java.i";
 
-%apply unsigned char[] { unsigned char *pkt };
-%apply signed char[] { char *buffer };
-
 %apply uint16_t *OUTPUT { uint16_t *id, uint16_t *score };
 
-
 %{
     #include "zfm20.h"
     speed_t int_B57600 = B57600;
 %}
 
+
+%typemap(jni) (char *buffer, size_t len) "jbyteArray";
+%typemap(jtype) (char *buffer, size_t len) "byte[]";
+%typemap(jstype) (char *buffer, size_t len) "byte[]";
+
+%typemap(javain) (char *buffer, size_t len) "$javainput";
+
+%typemap(in) (char *buffer, size_t len) {
+        $1 = (char *) JCALL2(GetByteArrayElements, jenv, $input, NULL);
+        $2 = JCALL1(GetArrayLength, jenv, $input);
+}
+
+%typemap(freearg) (char *buffer, size_t len) {
+        JCALL3(ReleaseByteArrayElements, jenv, $input, (jbyte *)$1, 0);
+}
+
+%apply (char *buffer, size_t len) { (unsigned char *pkt, int len) };
+
 %include "zfm20.h"
 speed_t int_B57600 = B57600;

src/zfm20/zfm20.cxx

@@ -229,7 +229,7 @@ uint32_t ZFM20::getMillis()
   return elapse;
 }
 
-bool ZFM20::verifyPacket(unsigned char *pkt)
+bool ZFM20::verifyPacket(unsigned char *pkt, int len)
 {
   // verify packet header
   if (pkt[0] != ZFM20_START1 || pkt[1] != ZFM20_START2)
@@ -291,7 +291,7 @@ bool ZFM20::getResponse(unsigned char *pkt, int len)
     }
 
   // now verify it.
-  return verifyPacket(pkt);
+  return verifyPacket(pkt, len);
 }
 
 bool ZFM20::verifyPassword()

src/zfm20/zfm20.h

@@ -212,9 +212,10 @@ namespace upm {
      * Verifies the packet header and indicates its validity
      *
      * @param pkt Packet to check
+     * @param len Length of packet
      * @return True if the checksum is valid, false otherwise
      */
-    bool verifyPacket(unsigned char *pkt);
+    bool verifyPacket(unsigned char *pkt, int len);
 
     /**
      * Returns the number of milliseconds elapsed since initClock()