/*
* Convert a JavaSignature object into a human-readable string format as seen
* in Java source files, e.g. "byte", or "int[][]" or "java.lang.String".
* The caller is responsible for freeing the resulting string.
*
* If an error is encountered, NULL is returned and an error reported.
*/
const char *
jsj_ConvertJavaSignatureToHRString(JSContext *cx,
JavaSignature *signature)
{
char *sig;
JavaSignature *acs;
if (signature->type == JAVA_SIGNATURE_ARRAY) {
/* An array class */
const char *component_signature_string;
acs = signature->array_component_signature;
component_signature_string =
jsj_ConvertJavaSignatureToHRString(cx, acs);
if (!component_signature_string)
return NULL;
sig = JS_smprintf("%s[]", component_signature_string);
JS_smprintf_free((char*)component_signature_string);
} else {
/* A primitive class or a non-array object class */
sig = JS_smprintf("%s", signature->name);
}
if (!sig) {
JS_ReportOutOfMemory(cx);
return NULL;
}
return sig;
}
/*
* Convert a JS value to a Java value of the given type signature. The cost
* variable is incremented if coercion is required, e.g. the source value is
* a string, but the target type is a boolean.
*
* Returns JS_FALSE if no conversion is possible, either because the jsval has
* a type that is wholly incompatible with the Java value, or because a scalar
* jsval can't be represented in a variable of the target type without loss of
* precision, e.g. the source value is "4.2" but the destination type is byte.
* If conversion is not possible and java_value is non-NULL, the JS error
* reporter is called with an appropriate message.
*/
JSBool
jsj_ConvertJSValueToJavaValue(JSContext *cx, JNIEnv *jEnv, jsval v_arg,
JavaSignature *signature,
int *cost, jvalue *java_value, JSBool *is_local_refp)
{
JavaSignatureChar type;
jsval v;
JSBool success = JS_FALSE;
/* Initialize to default case, in which no new Java object is
synthesized to perform the conversion and, therefore, no JNI local
references are being held. */
*is_local_refp = JS_FALSE;
type = signature->type;
v = v_arg;
switch (type) {
case JAVA_SIGNATURE_BOOLEAN:
if (!JSVAL_IS_BOOLEAN(v)) {
if (!JS_ConvertValue(cx, v, JSTYPE_BOOLEAN, &v))
goto conversion_error;
if (JSVAL_IS_VOID(v))
goto conversion_error;
(*cost)++;
}
if (java_value)
java_value->z = (jboolean)(JSVAL_TO_BOOLEAN(v) == JS_TRUE);
break;
case JAVA_SIGNATURE_SHORT:
JSVAL_TO_INTEGRAL_JVALUE(short, s, jshort, v, java_value);
break;
case JAVA_SIGNATURE_BYTE:
JSVAL_TO_INTEGRAL_JVALUE(byte, b, jbyte, v, java_value);
break;
case JAVA_SIGNATURE_CHAR:
/* A one-character string can be converted into a character */
if (JSVAL_IS_STRING(v) && (JS_GetStringLength(JSVAL_TO_STRING(v)) == 1)) {
v = INT_TO_JSVAL(*JS_GetStringChars(JSVAL_TO_STRING(v)));
}
JSVAL_TO_INTEGRAL_JVALUE(char, c, jchar, v, java_value);
break;
case JAVA_SIGNATURE_INT:
JSVAL_TO_INTEGRAL_JVALUE(int, i, jint, v, java_value);
break;
case JAVA_SIGNATURE_LONG:
#if defined(XP_MAC) || (defined(XP_OS2) && !defined(HAVE_LONG_LONG))
JSVAL_TO_JLONG_JVALUE(j, jlong, v, java_value);
#else
JSVAL_TO_INTEGRAL_JVALUE(long, j, jlong, v, java_value);
#endif
break;
case JAVA_SIGNATURE_FLOAT:
if (!JSVAL_IS_NUMBER(v)) {
if (!JS_ConvertValue(cx, v, JSTYPE_NUMBER, &v))
goto conversion_error;
(*cost)++;
}
if (java_value) {
if (JSVAL_IS_INT(v))
java_value->f = (jfloat) JSVAL_TO_INT(v);
else
java_value->f = (jfloat) *JSVAL_TO_DOUBLE(v);
}
break;
case JAVA_SIGNATURE_DOUBLE:
if (!JSVAL_IS_NUMBER(v)) {
if (!JS_ConvertValue(cx, v, JSTYPE_NUMBER, &v))
goto conversion_error;
(*cost)++;
}
if (java_value) {
if (JSVAL_IS_INT(v))
java_value->d = (jdouble) JSVAL_TO_INT(v);
else
java_value->d = (jdouble) *JSVAL_TO_DOUBLE(v);
}
break;
/* Non-primitive (reference) type */
default:
JS_ASSERT(IS_REFERENCE_TYPE(type));
if (!jsj_ConvertJSValueToJavaObject(cx, jEnv, v, signature, cost,
&java_value->l, is_local_refp))
goto conversion_error;
break;
case JAVA_SIGNATURE_UNKNOWN:
case JAVA_SIGNATURE_VOID:
JS_ASSERT(0);
return JS_FALSE;
}
/* Success */
return JS_TRUE;
numeric_conversion_error:
success = JS_TRUE;
/* Fall through ... */
conversion_error:
if (java_value) {
const char *jsval_string;
const char *class_name;
JSString *jsstr;
jsval_string = NULL;
jsstr = JS_ValueToString(cx, v_arg);
if (jsstr)
jsval_string = JS_GetStringBytes(jsstr);
if (!jsval_string)
jsval_string = "";
class_name = jsj_ConvertJavaSignatureToHRString(cx, signature);
JS_ReportErrorNumber(cx, jsj_GetErrorMessage, NULL,
JSJMSG_CANT_CONVERT_JS, jsval_string,
class_name);
return JS_FALSE;
}
return success;
}