public void addMethod(Method method, int access) throws Exception {
boolean isAbstract = false;
if (Modifier.isAbstract(access)) {
access = access & ~Modifier.ABSTRACT;
isAbstract = true;
}
Class<?>[] parameters = method.getParameterTypes();
Class<?> ret = method.getReturnType();
String sig = makeSig(ret, parameters);
String name = method.getName();
names.add(name);
Code code = classfile.addMethod(name, sig, access);
code.aload(0);
code.ldc(name);
if (!isAbstract) {
int tmp = code.getLocal("org/python/core/PyObject");
code.invokestatic(
"org/python/compiler/ProxyMaker", "findPython", makeSig($pyObj, $pyProxy, $str));
code.astore(tmp);
code.aload(tmp);
Label callPython = new Label();
code.ifnonnull(callPython);
String superClass = mapClass(method.getDeclaringClass());
callSuper(code, name, superClass, parameters, ret, sig);
code.label(callPython);
code.aload(tmp);
callMethod(code, name, parameters, ret, method.getExceptionTypes());
addSuperMethod("super__" + name, name, superClass, parameters, ret, sig, access);
} else {
code.invokestatic(
"org/python/compiler/ProxyMaker", "findPython", makeSig($pyObj, $pyProxy, $str));
code.dup();
Label returnNull = new Label();
code.ifnull(returnNull);
callMethod(code, name, parameters, ret, method.getExceptionTypes());
code.label(returnNull);
code.pop();
doNullReturn(code, ret);
}
}
public void addClassDictInit() throws Exception {
// classDictInit method
classfile.addInterface(mapClass(org.python.core.ClassDictInit.class));
Code code =
classfile.addMethod(
"classDictInit", makeSig("V", $pyObj), Modifier.PUBLIC | Modifier.STATIC);
code.aload(0);
code.ldc("__supernames__");
int strArray = CodeCompiler.makeStrings(code, supernames);
code.aload(strArray);
code.freeLocal(strArray);
code.invokestatic("org/python/core/Py", "java2py", makeSig($pyObj, $obj));
code.invokevirtual("org/python/core/PyObject", "__setitem__", makeSig("V", $str, $pyObj));
code.return_();
}
public void iconst(int i) throws IOException {
if (i >= -1 && i <= 5) {
code.writeByte(3 + i);
} else {
if (i > -127 && i < 128) {
code.writeByte(16);
if (i < 0) i = 256 + i;
code.writeByte(i);
} else {
if (i > -32767 && i < 32768) {
code.writeByte(17);
if (i < 0) i = i + 65536;
code.writeShort(i);
} else {
ldc(pool.Integer(i));
}
}
}
push(1);
}
public void ldc(String s) throws IOException {
ldc(pool.String(s));
}
public void print(String s) throws IOException {
getstatic("java/lang/System", "out", "Ljava/io/PrintStream;");
ldc(s);
invokevirtual("java/io/PrintStream", "println", "(Ljava/lang/String;)V");
}
public void callMethod(
Code code, String name, Class<?>[] parameters, Class<?> ret, Class<?>[] exceptions)
throws Exception {
Label start = null;
Label end = null;
String jcallName = "_jcall";
int instLocal = 0;
if (exceptions.length > 0) {
start = new Label();
end = new Label();
jcallName = "_jcallexc";
instLocal = code.getLocal("org/python/core/PyObject");
code.astore(instLocal);
code.label(start);
code.aload(instLocal);
}
getArgs(code, parameters);
switch (getType(ret)) {
case tCharacter:
doJavaCall(code, "char", "C", jcallName);
break;
case tBoolean:
doJavaCall(code, "boolean", "Z", jcallName);
break;
case tByte:
case tShort:
case tInteger:
doJavaCall(code, "int", "I", jcallName);
break;
case tLong:
doJavaCall(code, "long", "J", jcallName);
break;
case tFloat:
doJavaCall(code, "float", "F", jcallName);
break;
case tDouble:
doJavaCall(code, "double", "D", jcallName);
break;
case tVoid:
doJavaCall(code, "void", "V", jcallName);
break;
default:
code.invokevirtual("org/python/core/PyObject", jcallName, makeSig($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);
}
}