%include %fragment(SWIG_AsVal_frag(jstring),"header") { SWIGINTERN int SWIG_AsVal(jstring)(VALUE obj, jstring *val) { if (NIL_P(obj)){ if (val) *val = 0; return SWIG_OK; } if (TYPE(obj) == T_STRING) { if (val) { char *cstr = rb_string_value_ptr(&(obj)); jsize len = RSTRING_LEN(obj); *val = JvNewStringLatin1(cstr, len); } return SWIG_NEWOBJ; } return SWIG_TypeError; } } %fragment(SWIG_From_frag(jstring),"header") { SWIGINTERNINLINE VALUE SWIG_From(jstring)(jstring val) { if (!val) { return Qnil; } else { jint len = JvGetStringUTFLength(val); char buf[len]; JvGetStringUTFRegion(val, 0, len, buf); return rb_str_new(buf,len); } } } %typemaps_asvalfrom(%checkcode(STRING), %arg(SWIG_AsVal(jstring)), %arg(SWIG_From(jstring)), %arg(SWIG_AsVal_frag(jstring)), %arg(SWIG_From_frag(jstring)), java::lang::String *);