uk.co.jezuk.mango
Class BinaryPredicates

java.lang.Object
  uk.co.jezuk.mango.BinaryPredicates

public class BinaryPredicates
extends java.lang.Object

The Mango Library Binary Predicates

A BinaryPredicate is some function taking two arguments - fn(x, y) and returning the result of some test. It returns true if the conditions of the test are satisfied, false otherwise

Author:

Jez Higgins, jez@jezuk.co.uk

See Also:

BinaryPredicate

Method Summary

static <T1,T2> BinaryPredicate<T1,T2>	And(BinaryPredicate<T1,T2> pred1, BinaryPredicate<T1,T2> pred2) A BinaryPredicate which returns the logical AND of two other BinaryPredicate.
static <T1,T2> BinaryPredicate<T1,T2>	Constant(boolean constant) A BinaryPredicate which returns a precomputed constant value
static <T1,T2> BinaryPredicate<T1,T2>	EqualTo() BinaryPredicate testing for equality.
static <T1,T2> BinaryPredicate<T1,T2>	False() BinaryPredicates that always returns false
static <T1,T2> BinaryPredicate<T1,T2>	GreaterThan() BinaryPredicate that returns true if x is greater than y.
static <T1,T2> BinaryPredicate<T1,T2>	GreaterThanEquals() BinaryPredicate that returns true if x is greater than or equal to y.
static <T1,T2> BinaryPredicate<T1,T2>	LessThan() BinaryPredicate that returns true if x is less than y.
static <T1,T2> BinaryPredicate<T1,T2>	LessThanEquals() BinaryPredicate that returns true if x is less than or equal to y.
static <T1,T2> BinaryPredicate<T1,T2>	Not(BinaryPredicate<T1,T2> pred) A BinaryPredicate which is the logical negation of some other BinaryPredicate.
static <T1,T2> BinaryPredicate<T1,T2>	NotEqualTo() true if not(x.equals(y)), (x == null) && not(y == null) or not(x == null) && (y == null)
static <T1,T2> BinaryPredicate<T1,T2>	Or(BinaryPredicate<T1,T2> pred1, BinaryPredicate<T1,T2> pred2) A BinaryPredicate which returns the logical OR of two other BinaryPredicate.
static <T1,T2> BinaryPredicate<T1,T2>	True() BinaryPredicates that always returns true

Methods inherited from class java.lang.Object

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

Method Detail

True

public static <T1,T2> BinaryPredicate<T1,T2> True()

BinaryPredicates that always returns true

False

public static <T1,T2> BinaryPredicate<T1,T2> False()

BinaryPredicates that always returns false

Constant

public static <T1,T2> BinaryPredicate<T1,T2> Constant(boolean constant)

A BinaryPredicate which returns a precomputed constant value

EqualTo

public static <T1,T2> BinaryPredicate<T1,T2> EqualTo()

BinaryPredicate testing for equality. true if x.equals(y) or (x == null && y == null)

GreaterThan

public static <T1,T2> BinaryPredicate<T1,T2> GreaterThan()

BinaryPredicate that returns true if x is greater than y. x and y must implement the java.lang.Comparable interface.

GreaterThanEquals

public static <T1,T2> BinaryPredicate<T1,T2> GreaterThanEquals()

BinaryPredicate that returns true if x is greater than or equal to y. x and y must implement the java.lang.Comparable interface.

LessThan

public static <T1,T2> BinaryPredicate<T1,T2> LessThan()

BinaryPredicate that returns true if x is less than y. x and y must implement the java.lang.Comparable interface.

LessThanEquals

public static <T1,T2> BinaryPredicate<T1,T2> LessThanEquals()

BinaryPredicate that returns true if x is less than or equal to y. x and y must implement the java.lang.Comparable interface.

NotEqualTo

public static <T1,T2> BinaryPredicate<T1,T2> NotEqualTo()

true if not(x.equals(y)), (x == null) && not(y == null) or not(x == null) && (y == null)

Not

public static <T1,T2> BinaryPredicate<T1,T2> Not(BinaryPredicate<T1,T2> pred)

A BinaryPredicate which is the logical negation of some other BinaryPredicate. If n is a Not object, and pred is the Predicate it was constructed with, then n.test(x,y) returns !pred.test(x,y).

And

public static <T1,T2> BinaryPredicate<T1,T2> And(BinaryPredicate<T1,T2> pred1,
                                                 BinaryPredicate<T1,T2> pred2)

A BinaryPredicate which returns the logical AND of two other BinaryPredicate. If a is an And object, constructed with pred1 and pred2, then a.test(x,y) returns pred1.test(x,y) && pred2.test(x,y)

Or

public static <T1,T2> BinaryPredicate<T1,T2> Or(BinaryPredicate<T1,T2> pred1,
                                                BinaryPredicate<T1,T2> pred2)

A BinaryPredicate which returns the logical OR of two other BinaryPredicate. If a is an Or object, constructed with pred1 and pred2, then a.test(x,y) returns pred1.test(x,y) || pred2.test(x,y)