Recent questions tagged reflection

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reflection - Python decorator makes function forget that it belongs to a class

I am trying to write a decorator to do logging: def logger(myFunc): def new(*args, **keyargs): print 'Entering %s. ... ', but I've no idea what. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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901 views

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reflection - How do I intercept a method invocation with standard java features (no AspectJ etc)?

I want to intercept all method invocations to some class MyClass to be able to react on some setter-invocations ... or besided using AOP? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

1 answer

reflection - Reconstruct / get source code of a PHP function

Can I programmatically get the source code of a function by its name? Like: function blah($a, $b) ... //java.sun.com/developer/technicalArticles/ALT/Reflection/ Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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786 views

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reflection - Creating classes dynamically with Java

I have tried to find information about this but have come up empty handed: I gather it is possible to create a class ... e.getMessage()); } } return retval; } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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909 views

1 answer

reflection - Generating a class from string and instantiating it in Scala 2.10

In Scala 2.10 how do I generate a class from string (probably, using the Toolbox api) later to be instantiated with Scala's reflection? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

1 answer

reflection - Get class name of object as string in Swift

Getting the classname of an object as String using: object_getClassName(myViewController) returns something like this: ... Is it not possible at all? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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reflection - How to convert a Java object (bean) to key-value pairs (and vice versa)?

Say I have a very simple java object that only has some getXXX and setXXX properties. This object is used ... incoming message to the right kind of object). Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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888 views

1 answer

reflection - Python: changing methods and attributes at runtime

I wish to create a class in Python that I can add and remove attributes and methods. How can I acomplish that? Oh, and please don't ask why. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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797 views

1 answer

reflection - C# getting its own class name

If I have a class called MyProgram, is there a way of retrieving "MyProgram" as a string? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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reflection - What's the difference between System.Type and System.RuntimeType in C#?

I was trying to do some convention tests today, and getting all the types in an assembly (by calling Assembly. ... Is there any way to solve my problem? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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947 views

1 answer

reflection - At runtime, find all classes in a Java application that extend a base class

I want to do something like this: List<Animal> animals = new ArrayList<Animal>(); for( Class c: ... it seems this is fairly trivial in C#. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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798 views

1 answer

reflection - How to dynamically load a Python class

Given a string of a Python class, e.g. my_package.my_module.MyClass, what is the best possible way ... 'my_package.my_module.MyClass') my_instance = my_class() Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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866 views

1 answer

reflection - How to enumerate an object's properties in Python?

This question already has answers here: Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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973 views

1 answer

reflection - How to get the MethodInfo of a Java 8 method reference?

Please have a look at the following code: Method methodInfo = MyClass.class.getMethod("myMethod"); This ... Main() { PrintMethodName(InnerClass.MyMethod); } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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941 views

1 answer

reflection - How can I get a list of all classes within current module in Python?

I've seen plenty of examples of people extracting all of the classes from a module, usually something like: # foo ... to find anything. Can anyone help me out? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

932 views

1 answer

reflection - How do I read all classes from a Java package in the classpath?

I need to read classes contained in a Java package. Those classes are in classpath. I need to do this ... List<Class> classes = readClassesFrom("my.package") Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

846 views

1 answer

reflection - Avoiding instanceof in Java

Having a chain of "instanceof" operations is considered a "code smell". The standard answer is "use polymorphism". How ... do what I can with the base class } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

942 views

1 answer

reflection - Java - Get a list of all Classes loaded in the JVM

I would like to get a list of all the classes belonging to a certain package as well as all of their children. ... may or may not be already loaded in the JVM. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

929 views

1 answer

reflection - Can a Java class add a method to itself at runtime?

Can a class add a method to itself at runtime (like from a static block), so that if someone is performing ... inspected. The body of the method can be empty. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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958 views

1 answer

reflection - C# generic list <T> how to get the type of T?

This question already has answers here: Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

824 views

1 answer

reflection - Is it possible to dynamically load a library at runtime from an Android application?

Is there any way to make an Android application to download and use a Java library at runtime? Here is an ... such as the user who is downloading the library. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

801 views

1 answer

reflection - The setMobileDataEnabled method is no longer callable as of Android L and later

I have logged Issue 78084 with Google regarding the setMobileDataEnabled() method being no longer callable via ... universal method to toggle mobile network. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

932 views

1 answer

reflection - Getting the size of a field in bytes with C#

I have a class, and I want to inspect its fields and report eventually how many bytes each field takes. I assume ... = a.GetSizeInBytes; // a_size should be 4 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

834 views

1 answer

reflection - How do I intercept a method call in C#?

For a given class I would like to have tracing functionality i.e. I would like to log every method call ( ... I'm allowed to slightly change the Call method? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

927 views

1 answer

reflection - Loading DLLs at runtime in C#

I am trying to figure out how you could go about importing and using a .dll at runtime inside a C# application. Using ... "Hello"); } Console.ReadLine(); } } } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.2k views

1 answer

reflection - How to solve InaccessibleObjectException ("Unable to make {member} accessible: module {A} does not 'opens {package}' to {B}") on Java 9?

This exception occurs in a wide variety of scenarios when running an application on Java 9. Certain ... exception and have the program run successfully? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

933 views

1 answer

reflection - How can I evaluate a C# expression dynamically?

I would like to do the equivalent of: object result = Eval("1 + 3"); string now = Eval("System.DateTime.Now().ToString ... s = mi.Invoke(o, null); return s; } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

834 views

1 answer

reflection - How to list all functions in a Python module?

I have a Python module installed on my system and I'd like to be able to see what functions/classes/methods are ... # or whatever is the correct method to call Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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