Package eu.bandm.tools.paisley

Interface ReflectionPatterns.Access<A>

Type Parameters:

A - the target type of objects to extract from

All Superinterfaces:

CachedTransform.TryApply<A,Object>

Enclosing class:

ReflectionPatterns

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface ReflectionPatterns.Access<A>
extends CachedTransform.TryApply<A,Object>

A function that extracts data from a target object by reflection.

Method Summary

Modifier and Type	Method	Description
Object	access(A target)	Returns data extracted from the given object by reflection.
default Object	tryApply(A target)	Checks whether a target can be transformed and transforms it.

Method Details

access

Object access(A target)
       throws IllegalAccessException,
InvocationTargetException

Returns data extracted from the given object by reflection.

Parameters:

target - an object to extract data from

Returns:

data extracted from target by reflection

Throws:

IllegalAccessException - if reflection is enforcing Java language access control and the underlying member is inaccessible.

InvocationTargetException - if the underlying method throws an exception.

IllegalArgumentException - if the target object or any given parameter value for an underlying method is not of the expected type.

NullPointerException - if target is null and the access is not static.

See Also:

• Field.get(java.lang.Object)
• Method.invoke(java.lang.Object, java.lang.Object...)

tryApply

default Object tryApply(A target)
                 throws CachedTransform.ApplyException

Checks whether a target can be transformed and transforms it.

This implementation invokes access(A) and catches exceptions that may arise from the use of reflective operations.

Specified by:

tryApply in interface CachedTransform.TryApply<A,Object>

Parameters:

target - the object to be matched against.

Returns:

a target for Unary.body to be matched against.

Throws:

CachedTransform.ApplyException - if access throws an exception of type IllegalAccessException, IllegalArgumentException, NullPointerException or InvocationTargetException; the caught exception is forwarded as a cause.

See Also:

• CachedTransform.tryApply(A)