public void callMethod(
Code code, String name, Class<?>[] parameters, Class<?> ret, Class<?>[] exceptions)
throws Exception {
Label start = null;
Label end = null;
String jcallName = "_jcall";
int instLocal = 0;
if (exceptions.length > 0) {
start = new Label();
end = new Label();
jcallName = "_jcallexc";
instLocal = code.getLocal("org/python/core/PyObject");
code.astore(instLocal);
code.label(start);
code.aload(instLocal);
}
getArgs(code, parameters);
switch (getType(ret)) {
case tCharacter:
doJavaCall(code, "char", "C", jcallName);
break;
case tBoolean:
doJavaCall(code, "boolean", "Z", jcallName);
break;
case tByte:
case tShort:
case tInteger:
doJavaCall(code, "int", "I", jcallName);
break;
case tLong:
doJavaCall(code, "long", "J", jcallName);
break;
case tFloat:
doJavaCall(code, "float", "F", jcallName);
break;
case tDouble:
doJavaCall(code, "double", "D", jcallName);
break;
case tVoid:
doJavaCall(code, "void", "V", jcallName);
break;
default:
code.invokevirtual("org/python/core/PyObject", jcallName, makeSig($pyObj, $objArr));
code.ldc(ret.getName());
code.invokestatic("java/lang/Class", "forName", makeSig($clss, $str));
code.invokestatic("org/python/core/Py", "tojava", makeSig($obj, $pyObj, $clss));
// I guess I need this checkcast to keep the verifier happy
code.checkcast(mapClass(ret));
break;
}
if (end != null) {
code.label(end);
}
doReturn(code, ret);
if (exceptions.length > 0) {
boolean throwableFound = false;
Label handlerStart = null;
for (Class<?> exception : exceptions) {
handlerStart = new Label();
code.label(handlerStart);
int excLocal = code.getLocal("java/lang/Throwable");
code.astore(excLocal);
code.aload(excLocal);
code.athrow();
code.visitTryCatchBlock(start, end, handlerStart, mapClass(exception));
doNullReturn(code, ret);
code.freeLocal(excLocal);
if (exception == Throwable.class) throwableFound = true;
}
if (!throwableFound) {
// The final catch (Throwable)
handlerStart = new Label();
code.label(handlerStart);
int excLocal = code.getLocal("java/lang/Throwable");
code.astore(excLocal);
code.aload(instLocal);
code.aload(excLocal);
code.invokevirtual("org/python/core/PyObject", "_jthrow", makeSig("V", $throwable));
code.visitTryCatchBlock(start, end, handlerStart, "java/lang/Throwable");
code.freeLocal(excLocal);
doNullReturn(code, ret);
}
code.freeLocal(instLocal);
}
}
