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package org.python.compiler.custom_proxymaker;
/*
* This is a bare bones implementation of ClampMaker. It's goal is to be a "reference"
* implementation for the features that are provided by customizable ProxyMaker
*/
import java.lang.reflect.Constructor;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import org.python.compiler.Code;
import org.python.compiler.JavaMaker;
import org.python.core.Py;
import org.python.core.PyDictionary;
import org.python.core.PyObject;
import org.python.core.__builtin__;
import org.python.util.Generic;
public class MiniClampMaker extends JavaMaker {
private final Map<String, PyObject> methodsToAdd = Generic.map();
private final Map<String, PyObject> constructorsToAdd = Generic.map();
private AnnotationDescr[] classAnnotations = new AnnotationDescr[]{};
private static AnnotationDescr[] extractAnnotation(PyDictionary dict) {
List<AnnotationDescr> annotationDescrs = Generic.list();
for (PyObject annotationIter: dict.iteritems().asIterable()) {
PyObject annotationClass = annotationIter.__getitem__(0);
PyObject annotationFields = annotationIter.__getitem__(1);
AnnotationDescr annotationDescr = null;
if (annotationFields == Py.None) {
annotationDescr = new AnnotationDescr(Py.tojava(annotationClass, Class.class));
} else {
Map<String, Object> fields = Generic.map();
for (PyObject item: ((PyDictionary)annotationFields).iteritems().asIterable()) {
fields.put(Py.tojava(item.__getitem__(0), String.class), Py.tojava(item.__getitem__(1), Object.class));
}
annotationDescr = new AnnotationDescr(Py.tojava(annotationClass, Class.class), fields);
}
annotationDescrs.add(annotationDescr);
}
return (AnnotationDescr[]) annotationDescrs.toArray(new AnnotationDescr[annotationDescrs.size()]);
}
public MiniClampMaker(Class<?> superclass,
Class<?>[] interfaces,
String pythonClass,
String pythonModule,
String myClass,
PyObject methods) {
super(superclass, interfaces, pythonClass, pythonModule, myClass, methods);
// if we find __java_package__, override the default proxy naming with
// __java_package__ + .pythonClass
PyObject javaPackage = methods.__finditem__("__java_package__");
if (javaPackage != null) {
String newMyClass = new String((String)javaPackage.__tojava__(String.class));
newMyClass += "." + pythonClass;
this.myClass = newMyClass;
}
PyObject clampAttr = Py.newString("_clamp");
for (PyObject pykey : methods.asIterable()) {
String key = Py.tojava(pykey, String.class);
PyObject value = methods.__finditem__(key);
PyObject clampObj = __builtin__.getattr(value, clampAttr, Py.None);
if (clampObj == Py.None) {
continue;
}
String name = (String)clampObj.__getattr__("name").__tojava__(String.class);
if (name.equals("__init__")) {
constructorsToAdd.put(key, clampObj);
} else {
methodsToAdd.put(key, clampObj);
}
}
PyObject pyAnnotations = methods.__finditem__("_clamp_class_annotations");
if (pyAnnotations != null) {
classAnnotations = extractAnnotation((PyDictionary)pyAnnotations);
}
}
@Override
protected void visitClassAnnotations() throws Exception {
for (AnnotationDescr annotation: classAnnotations) {
addClassAnnotation(annotation);
}
}
@Override
protected void visitConstructors() throws Exception {
Set<Constructor<?>> superConstructors = Generic.set();
for (Constructor<?> constructor: superclass.getDeclaredConstructors()) {
superConstructors.add(constructor);
}
for (Entry<String, PyObject> meth : constructorsToAdd.entrySet()) {
Constructor<?> superToCall = null;
String pyName = meth.getKey();
PyObject clampObj = meth.getValue();
Class<?>[] thrownClasses = Py.tojava(clampObj.__getattr__("throws"), Class[].class);
Class<?>[] parameterClasses = Py.tojava(clampObj.__getattr__("argtypes"), Class[].class);
if (clampObj.__findattr__("super_constructor") != null) {
superToCall = (Constructor<?>)clampObj.__getattr__("super_constructor").__tojava__(Constructor.class);
} else { // try to find a matching super constructor
try {
superToCall = superclass.getDeclaredConstructor(parameterClasses);
} catch (NoSuchMethodException err) {
// FIXME need a fancy constructor finder
superToCall = superConstructors.iterator().next();
}
}
for (Constructor<?> constructor: superConstructors) {
if (Arrays.equals(constructor.getParameterTypes(), superToCall.getParameterTypes())) {
superConstructors.remove(constructor);
}
}
AnnotationDescr[] methodAnnotations = extractAnnotation((PyDictionary)clampObj.__getattr__("method_annotations"));
PyObject[] parameterAnnotationObjs = (PyObject[])clampObj.__getattr__("parameter_annotations").__tojava__(PyObject[].class);
AnnotationDescr[][]parameterAnnotations = new AnnotationDescr[parameterAnnotationObjs.length][];
for (int i = 0; i<parameterAnnotationObjs.length; i++) {
if (parameterAnnotationObjs[i].isMappingType()) {
parameterAnnotations[i] = extractAnnotation((PyDictionary)parameterAnnotationObjs[i]);
}
}
String fullsig = makeSig(Void.TYPE, parameterClasses);
String[] mappedExceptions = mapExceptions(thrownClasses);
// if our superclass already has
Code code = classfile.addMethod("<init>", fullsig, Modifier.PUBLIC, mappedExceptions, methodAnnotations, parameterAnnotations);
callSuper(code, "<init>", mapClass(superclass), superToCall.getParameterTypes(), Void.TYPE, false);
// instead of calling the proxy, we construct the full method code
addConstructorMethodCode(pyName, superToCall.getParameterTypes(), thrownClasses, Modifier.PUBLIC, superclass, code);
}
// the non-overwritten constructors
for (Constructor<?> constructor: superConstructors) {
addConstructor(constructor.getParameterTypes(), Modifier.PUBLIC);
}
}
@Override
protected void visitMethods () throws Exception {
for (Entry<String, PyObject> meth : methodsToAdd.entrySet()) {
PyObject clampObj = meth.getValue();
String methodName = (String)clampObj.__getattr__("name").__tojava__(String.class);
Class<?> returnClass = (Class<?>)clampObj.__getattr__("returntype").__tojava__(Class.class);
Class<?>[] thrownClasses = Py.tojava(clampObj.__getattr__("throws"), Class[].class);
Class<?>[] parameterClasses = Py.tojava(clampObj.__getattr__("argtypes"), Class[].class);
AnnotationDescr[] methodAnnotations = extractAnnotation((PyDictionary)clampObj.__getattr__("method_annotations"));
PyObject[] parameterAnnotationObjs = (PyObject[])clampObj.__getattr__("parameter_annotations").__tojava__(PyObject[].class);
AnnotationDescr[][]parameterAnnotations = new AnnotationDescr[parameterAnnotationObjs.length][];
for (int i = 0; i<parameterAnnotationObjs.length; i++) {
if (parameterAnnotationObjs[i].isMappingType()) {
parameterAnnotations[i] = extractAnnotation((PyDictionary)parameterAnnotationObjs[i]);
}
}
addMethod(methodName, meth.getKey(), (Class<?>)returnClass, parameterClasses, thrownClasses,
Modifier.PUBLIC, superclass, methodAnnotations, parameterAnnotations);
}
}
}
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