public static void doReturn(Code code, Class<?> type) throws Exception {
switch (getType(type)) {
case tNone:
break;
case tCharacter:
case tBoolean:
case tByte:
case tShort:
case tInteger:
code.ireturn();
break;
case tLong:
code.lreturn();
break;
case tFloat:
code.freturn();
break;
case tDouble:
code.dreturn();
break;
case tVoid:
code.return_();
break;
default:
code.areturn();
break;
}
}
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 callSuper(
Code code, String name, String superclass, Class<?>[] parameters, Class<?> ret, String sig)
throws Exception {
code.aload(0);
int local_index;
int i;
for (i = 0, local_index = 1; i < parameters.length; i++) {
switch (getType(parameters[i])) {
case tCharacter:
case tBoolean:
case tByte:
case tShort:
case tInteger:
code.iload(local_index);
local_index += 1;
break;
case tLong:
code.lload(local_index);
local_index += 2;
break;
case tFloat:
code.fload(local_index);
local_index += 1;
break;
case tDouble:
code.dload(local_index);
local_index += 2;
break;
default:
code.aload(local_index);
local_index += 1;
break;
}
}
code.invokespecial(superclass, name, sig);
doReturn(code, ret);
}
public void addProxy() throws Exception {
// implement PyProxy interface
classfile.addField("__proxy", $pyObj, Modifier.PROTECTED);
// setProxy methods
Code code = classfile.addMethod("_setPyInstance", makeSig("V", $pyObj), Modifier.PUBLIC);
code.aload(0);
code.aload(1);
code.putfield(classfile.name, "__proxy", $pyObj);
code.return_();
// getProxy method
code = classfile.addMethod("_getPyInstance", makeSig($pyObj), Modifier.PUBLIC);
code.aload(0);
code.getfield(classfile.name, "__proxy", $pyObj);
code.areturn();
String pySys = "Lorg/python/core/PySystemState;";
// implement PyProxy interface
classfile.addField("__systemState", pySys, Modifier.PROTECTED | Modifier.TRANSIENT);
// setProxy method
code = classfile.addMethod("_setPySystemState", makeSig("V", pySys), Modifier.PUBLIC);
code.aload(0);
code.aload(1);
code.putfield(classfile.name, "__systemState", pySys);
code.return_();
// getProxy method
code = classfile.addMethod("_getPySystemState", makeSig(pySys), Modifier.PUBLIC);
code.aload(0);
code.getfield(classfile.name, "__systemState", pySys);
code.areturn();
}
public void addMethod(Method method, int access) throws Exception {
boolean isAbstract = false;
if (Modifier.isAbstract(access)) {
access = access & ~Modifier.ABSTRACT;
isAbstract = true;
}
Class<?>[] parameters = method.getParameterTypes();
Class<?> ret = method.getReturnType();
String sig = makeSig(ret, parameters);
String name = method.getName();
names.add(name);
Code code = classfile.addMethod(name, sig, access);
code.aload(0);
code.ldc(name);
if (!isAbstract) {
int tmp = code.getLocal("org/python/core/PyObject");
code.invokestatic(
"org/python/compiler/ProxyMaker", "findPython", makeSig($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, $str));
code.dup();
Label returnNull = new Label();
code.ifnull(returnNull);
callMethod(code, name, parameters, ret, method.getExceptionTypes());
code.label(returnNull);
code.pop();
doNullReturn(code, ret);
}
}
public void callMethod(
Code code, String name, Class<?>[] parameters, Class<?> ret, Class<?>[] exceptions)
throws Exception {
Label start = null;
Label end = null;
String jcallName = "_jcall";
int instLocal = 0;
if (exceptions.length > 0) {
start = new Label();
end = new Label();
jcallName = "_jcallexc";
instLocal = code.getLocal("org/python/core/PyObject");
code.astore(instLocal);
code.label(start);
code.aload(instLocal);
}
getArgs(code, parameters);
switch (getType(ret)) {
case tCharacter:
doJavaCall(code, "char", "C", jcallName);
break;
case tBoolean:
doJavaCall(code, "boolean", "Z", jcallName);
break;
case tByte:
case tShort:
case tInteger:
doJavaCall(code, "int", "I", jcallName);
break;
case tLong:
doJavaCall(code, "long", "J", jcallName);
break;
case tFloat:
doJavaCall(code, "float", "F", jcallName);
break;
case tDouble:
doJavaCall(code, "double", "D", jcallName);
break;
case tVoid:
doJavaCall(code, "void", "V", jcallName);
break;
default:
code.invokevirtual("org/python/core/PyObject", jcallName, makeSig($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);
}
}
public void getArgs(Code code, Class<?>[] parameters) throws Exception {
if (parameters.length == 0) {
code.getstatic("org/python/core/Py", "EmptyObjects", $pyObjArr);
} else {
code.iconst(parameters.length);
code.anewarray("java/lang/Object");
int array = code.getLocal("[org/python/core/PyObject");
code.astore(array);
int local_index;
int i;
for (i = 0, local_index = 1; i < parameters.length; i++) {
code.aload(array);
code.iconst(i);
switch (getType(parameters[i])) {
case tBoolean:
case tByte:
case tShort:
case tInteger:
code.iload(local_index);
local_index += 1;
code.invokestatic("org/python/core/Py", "newInteger", "(I)" + $pyInteger);
break;
case tLong:
code.lload(local_index);
local_index += 2;
code.invokestatic("org/python/core/Py", "newInteger", "(J)" + $pyObj);
break;
case tFloat:
code.fload(local_index);
local_index += 1;
code.invokestatic("org/python/core/Py", "newFloat", "(F)" + $pyFloat);
break;
case tDouble:
code.dload(local_index);
local_index += 2;
code.invokestatic("org/python/core/Py", "newFloat", "(D)" + $pyFloat);
break;
case tCharacter:
code.iload(local_index);
local_index += 1;
code.invokestatic("org/python/core/Py", "newString", "(C)" + $pyStr);
break;
default:
code.aload(local_index);
local_index += 1;
break;
}
code.aastore();
}
code.aload(array);
}
}
public void doJavaCall(Code code, String name, String type, String jcallName) throws Exception {
code.invokevirtual("org/python/core/PyObject", jcallName, makeSig($pyObj, $objArr));
code.invokestatic("org/python/core/Py", "py2" + name, makeSig(type, $pyObj));
}
public void doConstants() throws Exception {
Code code = classfile.addMethod("<clinit>", makeSig("V"), Modifier.STATIC);
code.return_();
}
