added example of mixing hand written jni code with swig

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@330 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/java/native/Makefile

@@ -0,0 +1,17 @@
+TOP        = ../..
+SWIG       = $(TOP)/../swig
+SWIGOPT    =
+SRCS       = 
+TARGET     = libexample
+INTERFACE  = example.i
+
+all::	java
+
+java::
+	$(MAKE) -f $(TOP)/Makefile SRCS='$(SRCS)' SWIG='$(SWIG)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' java
+
+clean::
+	rm -f *_wrap* example.java *.class *.o *~ .~* core *.so *.sl so_locations
+
+

SWIG/Examples/java/native/README

@@ -0,0 +1,6 @@
+type:
+make
+javac *.java
+export LD_LIBRARY_PATH=. # sh
+setenv LD_LIBRARY_PATH . # csh
+java main

SWIG/Examples/java/native/example.i

@@ -0,0 +1,54 @@
+/* File : example.i */
+%module example
+
+%{
+#include <string.h>
+
+typedef struct point {
+  int x;
+  int y;
+} Point;
+
+
+Point *point_create(int x, int y) {
+  Point *p = (Point *) malloc(sizeof(Point));
+  p->x = x;
+  p->y = y;
+
+  return p;
+}
+
+/* this function will be wrapped by jswig */
+char *point_toString1(Point *p) {
+  char buf[80];
+
+  sprintf(buf, "(%d,%d)", p->x, p->y);
+
+  return strdup(buf); /* memory leak */
+}
+
+/* this one we wrapped manually*/
+JNIEXPORT jstring JNICALL Java_example_point_1toString2(JNIEnv *jenv, jclass jcls, jlong jpoint) {
+    Point * p;
+    char buf[80];
+    jstring result;
+
+    p = *(Point **)&jpoint;
+    sprintf(buf, "[%d,%d]", p->x, p->y);
+
+    result = (*jenv)->NewStringUTF(jenv, buf);
+
+    return result;
+}
+%}
+
+
+Point *point_create(int x, int y);
+char *point_toString1(Point *p);
+/*
+  Use %new to free the memory returned by point_toString1
+
+  %new char *point_toString1(Point *p);
+*/
+
+%native(point_toString2) char *point_toString2(Point *p);

SWIG/Examples/java/native/main.java

@@ -0,0 +1,19 @@
+import example;
+
+public class main {
+
+  static {
+    try {
+	System.loadLibrary("example");
+    } catch (UnsatisfiedLinkError e) {
+      System.err.println("Cannot load the native code.\nMake sure your LD_LIBRARY_PATH contains \'.\'\n" + e);
+      System.exit(1);
+    }
+  }
+
+  public static void main(String argv[]) {
+    long p = example.point_create(1, 2);
+    System.out.println("auto wrapped  : " + example.point_toString1(p));
+    System.out.println("manual wrapped: " + example.point_toString2(p));
+  }
+}

SWIG/Examples/java/simple/Makefile

@@ -4,10 +4,13 @@ SRCS       = example.c
 TARGET     = libexample
 INTERFACE  = example.i
 SWIGOPT    = 
-all::
+
+all::	java
+
+java::
 	$(MAKE) -f $(TOP)/Makefile SRCS='$(SRCS)' SWIG='$(SWIG)' \
 	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' java
 
 clean::
-	rm -f *_wrap* *.o core *~ *.so *.pm myperl
+	rm -f *_wrap* *.o core *~ *.so example.java
 

SWIG/Examples/java/simple/README

@@ -1 +1,8 @@
 Simple example from users manual.
+
+type:
+make
+javac *.java
+export LD_LIBRARY_PATH=. # sh
+setenv LD_LIBRARY_PATH . # csh
+java main