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/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);