Some Object Oriented programming languages allow creating new classes (types) in run-time (as compared to classes defined in the source code and created in compilation time)
Some examples of creating types in run-time:
C#
C++
Java
Python
Questions tagged [dynamic-class-creation]
78 questions
262
votes
16 answers
How to dynamically create a class?
I have a class which looks like this:
public class Field
{
public string FieldName;
public string FieldType;
}
And an object List with values:
{"EmployeeID","int"},
{"EmployeeName","String"},
{"Designation","String"}
I want to…
ashwnacharya
- 14,601
- 23
- 89
- 112
16
votes
8 answers
How can I modify a java.lang class on the fly?
I'm looking for a way to add fields to an Thread on the fly by rewriting the byte code and reloading the class, not sure if it is at all possible. Any pointers welcome. I found some info on modifying and loading a class, and I know JRebel can…
Nitsan Wakart
- 2,841
- 22
- 27
14
votes
2 answers
Creating Dynamic Classes in Jade/Pug
I'm trying to add a dynamic class to a jade template. Like so:
- var obj = {a: 1, b: 2, c: 3};
- var len = Object.keys(obj).length;
.abc-#{len}
But the compiler is taking exception to this:
> 4| .abc-#{len}
------------^
Unexpected token…
NotoriousWebmaster
- 3,298
- 7
- 37
- 49
9
votes
3 answers
What is the advantage in using `exec` over `type()` when creating classes at runtime?
I want to dynamically create classes at runtime in python.
For example, I want to replicate the code below:
>>> class RefObj(object):
... def __init__(self, ParentClassName):
... print "Created RefObj with ties to %s" %…
Russ
- 10,835
- 12
- 42
- 57
6
votes
4 answers
how to dynamically create a component in delphi such as TLabel or TEdit ...etc
Using Delphi 2010
SQLQuery1.First; // move to the first record
while(not SQLQuery1.EOF)do begin
// do something with the current record
// What's the code should i write in this part in order to create a TEdit
// containing the user…
Rafik Bari
- 4,867
- 18
- 73
- 123
6
votes
6 answers
Java: Strong Code mobility How to?
Does anyone know how to use Java for Strong code mobility? Have you ever done it before?
Here's what I try to achieve.
Suppose we have 2 separate Java applications that communicate over network. App A and App B.
App A has a class x instantiated as…
sivabudh
- 31,807
- 63
- 162
- 228
5
votes
1 answer
Byte Buddy - define constructor with call to super class and initialize field
I have a class such as:
public class Sample{
private String a;
private String b;
public Sample(String a, String b)
{
this.a = a;
this.b = b;
}
public String getA() {return a;}
public String getB() {return b;}
}
I want to create a…
Rotem ben
- 156
- 2
- 13
5
votes
6 answers
Best way to dynamically create classes instead of using a switch block
Currently I have my VaryByCustom functionality implemented in classes that implement an interface IOutputCacheVaryByCustom
public interface IOutputCacheVaryByCustom
{
string CacheKey { get; }
HttpContext Context { get; }
}
A class…
Chris Marisic
- 32,487
- 24
- 164
- 258
4
votes
3 answers
java generics vs dynamically loading class using Class.forName()
Assume I am making a class called Government. Government has members like officers, ministers, departments etc. For each of those members I create an interface, and any specific government defines them as they like.
The main method in the Government…
Aman
- 639
- 1
- 9
- 25
4
votes
2 answers
Reflection to avoid class load
I was reading through the PerfMark code and saw a comment about avoid an accidental class load through using reflection in a commit:
if (Boolean.getBoolean("io.perfmark.PerfMark.debug")) {
- …
Jane
- 83
- 6
4
votes
1 answer
How is the __class__ cell value set in class methods?
Looking at the documentation of the super type in Python 3.5, it notes that super(…) is the same as super(__class__, «first argument to function»). To my surprise, I wrote a method that returned __class__ – and it actually worked:
>>> class c:
... …
Sam Hartman
- 6,210
- 3
- 23
- 40
4
votes
3 answers
Java way to create an object based on enum type
My class is like this:
class X {}
class Y extends X {};
class Z extends X {};
I have an enum for each subclass (id + class):
enum Type {
Y_TYPE(1, Y.class), Z_TYPE(2, Z.class);
int id;
Class c;
public Type(int id, Class c) { this.id =…
w00d
- 5,416
- 12
- 53
- 85
4
votes
3 answers
Python: dynamic class generation: overwrite members
I have a python class hierarchy, that I want to extend at runtime. Furthermore every class in this hierarchy has a static attribute 'dict', that I want to overwrite in every subclass. Simplyfied it looks like this:
'dict' is a protected (public but…
Philip Daubmeier
- 14,584
- 5
- 41
- 77
3
votes
1 answer
python: name mangling in a dynamically created class
I want to do something like this
def make_class(name : str)->type:
class Ret:
__name__ = name
def __init__(self):
self.__x = 0
return Ret
A = make_class('A')
a = A()
assert a._A__x == 0
Basically, what I want is to…
bentheiii
- 451
- 3
- 15
3
votes
1 answer
Creating dynamic class from a string containing the class definition
I have a stored procedure which accepts the table name, then it reads the table structure and returns me the table structure in the form of a class definition in a string.
E.g.:
string myString =
"
public class TableName
{
public int…
Ankur Arora
- 194
- 3
- 15