private static ObjToIntMap getObjectFunctionNames(Scriptable obj) {
Object[] ids = ScriptableObject.getPropertyIds(obj);
ObjToIntMap map = new ObjToIntMap(ids.length);
for (int i = 0; i != ids.length; ++i) {
if (!(ids[i] instanceof String)) continue;
String id = (String) ids[i];
Object value = ScriptableObject.getProperty(obj, id);
if (value instanceof Function) {
Function f = (Function) value;
int length = ScriptRuntime.toInt32(ScriptableObject.getProperty(f, "length"));
if (length < 0) {
length = 0;
}
map.put(id, length);
}
}
return map;
}
public static byte[] createAdapterCode(
ObjToIntMap functionNames,
String adapterName,
Class superClass,
Class[] interfaces,
String scriptClassName) {
ClassFileWriter cfw = new ClassFileWriter(adapterName, superClass.getName(), "<adapter>");
cfw.addField(
"factory",
"Lorg/mozilla/javascript/ContextFactory;",
(short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
cfw.addField(
"delegee",
"Lorg/mozilla/javascript/Scriptable;",
(short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
cfw.addField(
"self",
"Lorg/mozilla/javascript/Scriptable;",
(short) (ClassFileWriter.ACC_PUBLIC | ClassFileWriter.ACC_FINAL));
int interfacesCount = interfaces == null ? 0 : interfaces.length;
for (int i = 0; i < interfacesCount; i++) {
if (interfaces[i] != null) cfw.addInterface(interfaces[i].getName());
}
String superName = superClass.getName().replace('.', '/');
generateCtor(cfw, adapterName, superName);
generateSerialCtor(cfw, adapterName, superName);
if (scriptClassName != null) generateEmptyCtor(cfw, adapterName, superName, scriptClassName);
ObjToIntMap generatedOverrides = new ObjToIntMap();
ObjToIntMap generatedMethods = new ObjToIntMap();
// generate methods to satisfy all specified interfaces.
for (int i = 0; i < interfacesCount; i++) {
Method[] methods = interfaces[i].getMethods();
for (int j = 0; j < methods.length; j++) {
Method method = methods[j];
int mods = method.getModifiers();
if (Modifier.isStatic(mods) || Modifier.isFinal(mods)) {
continue;
}
String methodName = method.getName();
Class[] argTypes = method.getParameterTypes();
if (!functionNames.has(methodName)) {
try {
superClass.getMethod(methodName, argTypes);
// The class we're extending implements this method and
// the JavaScript object doesn't have an override. See
// bug 61226.
continue;
} catch (NoSuchMethodException e) {
// Not implemented by superclass; fall through
}
}
// make sure to generate only one instance of a particular
// method/signature.
String methodSignature = getMethodSignature(method, argTypes);
String methodKey = methodName + methodSignature;
if (!generatedOverrides.has(methodKey)) {
generateMethod(cfw, adapterName, methodName, argTypes, method.getReturnType());
generatedOverrides.put(methodKey, 0);
generatedMethods.put(methodName, 0);
}
}
}
// Now, go through the superclasses methods, checking for abstract
// methods or additional methods to override.
// generate any additional overrides that the object might contain.
Method[] methods = getOverridableMethods(superClass);
for (int j = 0; j < methods.length; j++) {
Method method = methods[j];
int mods = method.getModifiers();
// if a method is marked abstract, must implement it or the
// resulting class won't be instantiable. otherwise, if the object
// has a property of the same name, then an override is intended.
boolean isAbstractMethod = Modifier.isAbstract(mods);
String methodName = method.getName();
if (isAbstractMethod || functionNames.has(methodName)) {
// make sure to generate only one instance of a particular
// method/signature.
Class[] argTypes = method.getParameterTypes();
String methodSignature = getMethodSignature(method, argTypes);
String methodKey = methodName + methodSignature;
if (!generatedOverrides.has(methodKey)) {
generateMethod(cfw, adapterName, methodName, argTypes, method.getReturnType());
generatedOverrides.put(methodKey, 0);
generatedMethods.put(methodName, 0);
}
// if a method was overridden, generate a "super$method"
// which lets the delegate call the superclass' version.
if (!isAbstractMethod) {
generateSuper(
cfw,
adapterName,
superName,
methodName,
methodSignature,
argTypes,
method.getReturnType());
}
}
}
// Generate Java methods for remaining properties that are not
// overrides.
ObjToIntMap.Iterator iter = new ObjToIntMap.Iterator(functionNames);
for (iter.start(); !iter.done(); iter.next()) {
String functionName = (String) iter.getKey();
if (generatedMethods.has(functionName)) continue;
int length = iter.getValue();
Class[] parms = new Class[length];
for (int k = 0; k < length; k++) parms[k] = ScriptRuntime.ObjectClass;
generateMethod(cfw, adapterName, functionName, parms, ScriptRuntime.ObjectClass);
}
return cfw.toByteArray();
}