com.edorasware.commons.core.query

Class Predicates

java.lang.Object

com.edorasware.commons.core.query.Predicates

public final class Predicates
extends Object

This class implements basic operations with predicates

Field Summary

Fields

Modifier and Type	Field and Description
static Predicate	EMPTY An empty predicate.

Method Summary

Modifier and Type	Method and Description
static Predicate	and(List<? extends Predicate> predicates) Concatenates the given predicates to a combined predicate through a logical AND operator.
static Predicate	and(Predicate one, Predicate two, Predicate... more) Concatenates the given predicates to a combined predicate through a logical AND operator.
static Predicate	getMinimalPredicate(CompositePredicate compositePredicate) Returns the minimal predicate for the given composite.
static Predicate	not(Predicate predicate) Negates the given predicate through a NOT operator.
static Predicate	or(List<? extends Predicate> predicates) Concatenates the given predicates to a combined predicate through a logical OR operator.
static Predicate	or(Predicate one, Predicate two, Predicate... more) Concatenates the given predicates to a combined predicate through a logical OR operator.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final Predicate EMPTY

An empty predicate. Behaves as a neutral element which always matches.

Method Detail

and

public static Predicate and(List<? extends Predicate> predicates)

Concatenates the given predicates to a combined predicate through a logical AND operator.

Parameters:

predicates - the predicates to and-concatenate

Returns:

a new predicate representing the concatenation

and

public static Predicate and(Predicate one,
                            Predicate two,
                            Predicate... more)

Concatenates the given predicates to a combined predicate through a logical AND operator.

Parameters:

one - the first predicate

two - the second predicate

more - all further predicates

Returns:

a new predicate representing the concatenation

or

public static Predicate or(List<? extends Predicate> predicates)

Concatenates the given predicates to a combined predicate through a logical OR operator.

Parameters:

predicates - the predicates to or-concatenate

Returns:

a new predicate representing the concatenation

or

public static Predicate or(Predicate one,
                           Predicate two,
                           Predicate... more)

Concatenates the given predicates to a combined predicate through a logical OR operator.

Parameters:

one - the first predicate

two - the second predicate

more - all further predicates

Returns:

a new predicate representing the concatenation

not

public static Predicate not(Predicate predicate)

Negates the given predicate through a NOT operator.

Parameters:

predicate - the predicate to be negated

Returns:

the negated predicate.

getMinimalPredicate

public static Predicate getMinimalPredicate(CompositePredicate compositePredicate)

Returns the minimal predicate for the given composite.

Parameters:

compositePredicate - the composite predicate

Returns:

the minimal equivalent predicate