play.libs.reflect

Class ConstructorUtils

java.lang.Object

play.libs.reflect.ConstructorUtils

public class ConstructorUtils
extends java.lang.Object

Imported from apache.commons.lang3 3.6

Constructor Summary

Constructors

Constructor and Description
ConstructorUtils()

Method Summary

Modifier and Type	Method and Description
static <T> java.lang.reflect.Constructor<T>	getAccessibleConstructor(java.lang.reflect.Constructor<T> ctor) Checks if the specified constructor is accessible.
static <T> java.lang.reflect.Constructor<T>	getMatchingAccessibleConstructor(java.lang.Class<T> cls, java.lang.Class<?>... parameterTypes) Finds an accessible constructor with compatible parameters.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ConstructorUtils

public ConstructorUtils()

Method Detail

getAccessibleConstructor

public static <T> java.lang.reflect.Constructor<T> getAccessibleConstructor(java.lang.reflect.Constructor<T> ctor)

Checks if the specified constructor is accessible.

This simply ensures that the constructor is accessible.

Type Parameters:

T - the constructor type

Parameters:

ctor - the prototype constructor object, not null

Returns:

the constructor, null if no matching accessible constructor found

Throws:

java.lang.NullPointerException - if ctor is null

See Also:

SecurityManager

getMatchingAccessibleConstructor

public static <T> java.lang.reflect.Constructor<T> getMatchingAccessibleConstructor(java.lang.Class<T> cls,
                                                                                    java.lang.Class<?>... parameterTypes)

Finds an accessible constructor with compatible parameters.

This checks all the constructor and finds one with compatible parameters This requires that every parameter is assignable from the given parameter types. This is a more flexible search than the normal exact matching algorithm.

First it checks if there is a constructor matching the exact signature. If not then all the constructors of the class are checked to see if their signatures are assignment-compatible with the parameter types. The first assignment-compatible matching constructor is returned.

Type Parameters:

T - the constructor type

Parameters:

cls - the class to find a constructor for, not null

parameterTypes - find method with compatible parameters

Returns:

the constructor, null if no matching accessible constructor found

Throws:

java.lang.NullPointerException - if cls is null