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ExposedNew.java
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30 lines (27 loc) · 1.37 KB
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package org.python.expose;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.python.core.PyInteger;
/**
* <p>
* Can appear on two forms of methods to indicate a method should be part of the __new__ object
* creation. Can only appear once per exposed type.
*<p>
* In the first form, the method must be static and take the arguments
* <code>PyNewWrapper new_, boolean init, PyType
subtype, PyObject[] args, String[] keywords</code>. In this case, the method has full
* responsibility for creating and initting the object and will be invoked for every subtype of this
* exposed type. Essentially it's for object instantiation that must be called for every instance of
* that object. See {@link PyInteger#int_new} for an example of this type of ExposedNew.
*<p>
* In the second form, the method must be an instance method that takes the standard Jython call
* arguments, <code>PyObject[] args, String[] keywords</code>. In this case, the basic new
* functionality is handled by PyOverridableNew and the method with ExposedNew is called as __init__
* as part of that process. This allows subtypes to completely redefine new and create objects
* however they like.
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface ExposedNew {}