com.helger.commons.filter

Interface IFilter<DATATYPE>

Type Parameters:

DATATYPE - The type of object to filter.

All Superinterfaces:

IPredicate<DATATYPE>, Predicate<DATATYPE>, Serializable

All Known Subinterfaces:

IFileFilter

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 interface IFilter<DATATYPE>
extends IPredicate<DATATYPE>

A generic filter interface for simple object selection. If you need an additional parameter for determining whether to filter an object or not, you may use the IFilterWithParameter instead. With Java 8 this is basically a serializable Predicate.

Author:

Philip

Method Summary

Modifier and Type	Method and Description
static <DATATYPE> IFilter<DATATYPE>	all()
default IFilter<DATATYPE>	and(IFilter<? super DATATYPE> other)
static <DATATYPE> Predicate<DATATYPE>	and(Predicate<DATATYPE> aFirst, Predicate<DATATYPE> aSecond)
static <DATATYPE> IFilter<DATATYPE>	isNull()
default IFilter<DATATYPE>	negate() Returns a predicate that represents the logical negation of this predicate.
static <DATATYPE> IFilter<DATATYPE>	none()
static <DATATYPE> IFilter<DATATYPE>	notNull()
default IFilter<DATATYPE>	or(IFilter<? super DATATYPE> other)
static <DATATYPE> Predicate<DATATYPE>	or(Predicate<DATATYPE> aFirst, Predicate<DATATYPE> aSecond)

Methods inherited from interface com.helger.commons.function.IPredicate

and, and, isEqual, or, or

Methods inherited from interface java.util.function.Predicate

test

Method Detail

and

@Nonnull
default IFilter<DATATYPE> and(@Nonnull
                                        IFilter<? super DATATYPE> other)

or

@Nonnull
default IFilter<DATATYPE> or(@Nonnull
                                       IFilter<? super DATATYPE> other)

negate

@Nonnull
default IFilter<DATATYPE> negate()

Description copied from interface: IPredicate

Returns a predicate that represents the logical negation of this predicate.

Specified by:

negate in interface IPredicate<DATATYPE>

Specified by:

negate in interface Predicate<DATATYPE>

Returns:

a predicate that represents the logical negation of this predicate

all

@Nonnull
static <DATATYPE> IFilter<DATATYPE> all()

Specified by:

all in interface IPredicate<DATATYPE>

none

@Nonnull
static <DATATYPE> IFilter<DATATYPE> none()

Specified by:

none in interface IPredicate<DATATYPE>

notNull

@Nonnull
static <DATATYPE> IFilter<DATATYPE> notNull()

Specified by:

notNull in interface IPredicate<DATATYPE>

isNull

@Nonnull
static <DATATYPE> IFilter<DATATYPE> isNull()

Specified by:

isNull in interface IPredicate<DATATYPE>

and

@Nullable
static <DATATYPE> Predicate<DATATYPE> and(@Nullable
                                                     Predicate<DATATYPE> aFirst,
                                                     @Nullable
                                                     Predicate<DATATYPE> aSecond)

or

@Nullable
static <DATATYPE> Predicate<DATATYPE> or(@Nullable
                                                    Predicate<DATATYPE> aFirst,
                                                    @Nullable
                                                    Predicate<DATATYPE> aSecond)