org.opencastproject.util.data.functions

Class Booleans

java.lang.Object

org.opencastproject.util.data.functions.Booleans

public final class Booleans
extends Object

Boolean functions.

Field Summary

Fields

Modifier and Type	Field and Description
static Function2<Boolean,Boolean,Boolean>	and
static Function0<Boolean>	no A function that always returns false.
static Function<Boolean,Boolean>	not
static Function2<Boolean,Boolean,Boolean>	or
static Function0<Boolean>	yes A function that always returns true.

Method Summary

Modifier and Type	Method and Description
static <A> Function<A,Boolean>	all(Function<A,Boolean>... fs)
static <A> Function<A,Boolean>	always() Return a predicate function that always returns true.
static <A> Function<A,Boolean>	and(Function<A,Boolean> f, Function<A,Boolean> g)
static <A,B> Function2<A,B,Boolean>	and2(Function<A,Boolean> f, Function<B,Boolean> g)
static <A> Function<A,Boolean>	andN(Function<A,Boolean>... fs) Apply functions lazily and return their results concatenated with boolean AND, i.e.
static <A> Function<A,Boolean>	andNEager(Function<A,Boolean>... fs) Apply all functions and return their results concatenated with boolean AND.
static <A> Function<A,Boolean>	eq(A a)
static <A extends Comparable<A>> Function<A,Boolean>	gt(A a)
static <A extends Comparable<A>> Function<A,Boolean>	lt(A a)
static <A> Function<A,Boolean>	ne(A a)
static <A> Function<A,Boolean>	no() A function that always returns false.
static <A> Function<A,Boolean>	not(Function<A,Boolean> f)
static <A> Function<A,Boolean>	nothing() Return a predicate function that always returns false.
static <A> Function<A,Boolean>	one(Function<A,Boolean>... fs)
static <A> Function<A,Boolean>	yes() A function that always returns true.

Methods inherited from class java.lang.Object

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

Field Detail

and

public static final Function2<Boolean,Boolean,Boolean> and

or

public static final Function2<Boolean,Boolean,Boolean> or

yes

public static final Function0<Boolean> yes

A function that always returns true.

no

public static final Function0<Boolean> no

A function that always returns false.

not

public static final Function<Boolean,Boolean> not

Method Detail

always

public static <A> Function<A,Boolean> always()

Return a predicate function that always returns true.

nothing

public static <A> Function<A,Boolean> nothing()

Return a predicate function that always returns false.

ne

public static <A> Function<A,Boolean> ne(A a)

eq

public static <A> Function<A,Boolean> eq(A a)

lt

public static <A extends Comparable<A>> Function<A,Boolean> lt(A a)

gt

public static <A extends Comparable<A>> Function<A,Boolean> gt(A a)

and2

public static <A,B> Function2<A,B,Boolean> and2(Function<A,Boolean> f,
                                                Function<B,Boolean> g)

and

public static <A> Function<A,Boolean> and(Function<A,Boolean> f,
                                          Function<A,Boolean> g)

all

public static <A> Function<A,Boolean> all(Function<A,Boolean>... fs)

one

public static <A> Function<A,Boolean> one(Function<A,Boolean>... fs)

andNEager

public static <A> Function<A,Boolean> andNEager(Function<A,Boolean>... fs)

Apply all functions and return their results concatenated with boolean AND.

andN

public static <A> Function<A,Boolean> andN(Function<A,Boolean>... fs)

Apply functions lazily and return their results concatenated with boolean AND, i.e. function application stops after the first function yielding false.

yes

public static <A> Function<A,Boolean> yes()

A function that always returns true.

no

public static <A> Function<A,Boolean> no()

A function that always returns false.

not

public static <A> Function<A,Boolean> not(Function<A,Boolean> f)