+ some imp.

JNIKiwix.h

@@ -10,10 +10,10 @@ extern "C" {
 /*
  * Class:     JNIKiwix
  * Method:    nativeLoadZIM
- * Signature: ()Ljava/lang/Boolean;
+ * Signature: (Ljava/lang/String;)Z
  */
-JNIEXPORT jobject JNICALL Java_JNIKiwix_nativeLoadZIM
-  (JNIEnv *, jobject);
+JNIEXPORT jboolean JNICALL Java_JNIKiwix_nativeLoadZIM
+  (JNIEnv *, jobject, jstring);
 
 /*
  * Class:     JNIKiwix

JNIKiwix.java

@@ -1,12 +1,22 @@
 public class JNIKiwix {    
-    public native Boolean nativeLoadZIM();    
+    public native boolean nativeLoadZIM(String path);    
     public native String nativeGetContent(String url);
 
     static {
         System.loadLibrary("kiwix");
-    }        
+    }
     
     public static void main(String[] args) {
+	JNIKiwix self = new JNIKiwix();
+
+	try {
+	    self.nativeLoadZIM("test.zim");
+	}
+	catch (Exception e) {
+	    System.out.println("Message " + e.getMessage());
+	    e.printStackTrace();
+	}
+
 	return;
     }
 }

compile.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Compile the JNI class, this will create JNIKiwix.class
+javac JNIKiwix.java
+
+# Create the JNI header file, this will create JNIKiwix.h
+javah -jni JNIKiwix
+
+# Compile the native lib libkiwix.so
+g++ -shared -fpic -o libkiwix.so -I/usr/lib/jvm/java-7-openjdk-i386/include/ kiwix.c
+
+# Run the code
+java -Djava.library.path=./ JNIKiwix

kiwix.c

@@ -1,11 +1,32 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
 #include <jni.h>
 #include "JNIKiwix.h"
 
-JNIEXPORT jobject JNICALL Java_JNIKiwix_nativeLoadZIM(JNIEnv *env, jobject obj) {
+#include <iostream>
+#include <string>
+
+/* c2jni type conversion functions */
+jboolean c2jni(const bool &val) {
+  return val ? JNI_TRUE : JNI_FALSE;
+}
+
+jstring c2jni(const std::string &val, JNIEnv *env) {
+  return env->NewStringUTF(val.c_str());
+}
+
+/* jni2c type conversion functions */
+bool jni2c(const jboolean &val) {
+  return val == JNI_TRUE;
+}
+
+std::string jni2c(const jstring &val, JNIEnv *env) {
+  return std::string(env->GetStringUTFChars(val, 0));
+}
+
+/* Kiwix library functions */
+JNIEXPORT jboolean JNICALL Java_JNIKiwix_nativeLoadZIM(JNIEnv *env, jobject obj, jstring path) {
+  return c2jni(true);
 }
 
 JNIEXPORT jstring JNICALL Java_JNIKiwix_nativeGetContent(JNIEnv *env, jobject obj, jstring url) {
 }
+