org.opencastproject.util.data.functions

Class Misc

java.lang.Object

org.opencastproject.util.data.functions.Misc

public final class Misc
extends Object

Various functions not directly bound to any type.

Method Summary

Modifier and Type	Method and Description
static <A,B> Function<A,B>	cast() Cast from A to B.
static <A,B> B	cast(A v, Class<B> to) Cast from A to B with special treatment of the Number classes.
static <A extends Throwable,B> Function<A,B>	chuck() chuck(Throwable) as a function.
static <A> A	chuck(Throwable t) Throw a checked exception like a RuntimeException removing any needs to declare a throws clause.
static <A extends Exception> Function0<A>	error(Class<A> cls, String msg)
static <A extends Exception> Function0<A>	error(Class<A> cls, String msg, Throwable cause)
static <A> Function<A,A>	ifThen(A predicate, A b)
static <A> List<A>	widen(Class<A> type, List<? extends A> xs) Widening cast.
static <A> Option<A>	widen(Class<A> type, Option<? extends A> xs) Widening cast.
static <A> List<A>	widen(List<? extends A> xs) Widening cast.
static <A> Option<A>	widen(Option<? extends A> xs) Widening cast.

Methods inherited from class java.lang.Object

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

Method Detail

chuck

public static <A> A chuck(Throwable t)

Throw a checked exception like a RuntimeException removing any needs to declare a throws clause. This technique has been described by James Iry at http://james-iry.blogspot.de/2010/08/on-removing-java-checked-exceptions-by.html

chuck

public static <A extends Throwable,B> Function<A,B> chuck()

chuck(Throwable) as a function.

cast

public static <A,B> B cast(A v,
                           Class<B> to)

Cast from A to B with special treatment of the Number classes.

cast

public static <A,B> Function<A,B> cast()

Cast from A to B.

widen

public static <A> List<A> widen(List<? extends A> xs)

Widening cast.

widen

public static <A> List<A> widen(Class<A> type,
                                List<? extends A> xs)

Widening cast.

widen

public static <A> Option<A> widen(Option<? extends A> xs)

Widening cast.

widen

public static <A> Option<A> widen(Class<A> type,
                                  Option<? extends A> xs)

Widening cast.

error

public static <A extends Exception> Function0<A> error(Class<A> cls,
                                                       String msg,
                                                       Throwable cause)

error

public static <A extends Exception> Function0<A> error(Class<A> cls,
                                                       String msg)

ifThen

public static <A> Function<A,A> ifThen(A predicate,
                                       A b)