Package eu.bandm.tools.paisley

Class Filter<A>

java.lang.Object

eu.bandm.tools.paisley.AbstractPattern<A>

eu.bandm.tools.paisley.Unary<A,A>

eu.bandm.tools.paisley.Transform<A,A>

eu.bandm.tools.paisley.RestrictedTransform<A,A>

eu.bandm.tools.paisley.Filter<A>

Type Parameters:

A - the target type of objects to match against

All Implemented Interfaces:

Pattern<A>, Serializable, Cloneable

@Generated(generator="eu.bandm.tools.expander",
           version="1.3.1",
           timestamp="2026-02-01T13:13:54")
public abstract class Filter<A>
extends RestrictedTransform<A,A>

Abstract base class for patterns that match only a subset of the target type.

Subclasses should override the RestrictedTransform.isDomain(A) method. The default always returns true, performing no filtering.

See Also:

• Serialized Form

Field Summary

Fields inherited from interface eu.bandm.tools.paisley.Pattern

none

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Filter(Pattern<? super A> body)	Creates a new pattern.

Method Summary

Modifier and Type	Method	Description
final A	apply(A target)	Transforms a target to be matched into a target for the subpattern.
static <A> Filter<A>	of(Predicate<? super A> pred, Pattern<? super A> body)
static <A> Motif<A,A>	with(Predicate<? super A> pred)

Methods inherited from class eu.bandm.tools.paisley.RestrictedTransform

cut, isDomain, isRange, match, matchAgain, ofUnlessNull, withUnlessNull

Methods inherited from class eu.bandm.tools.paisley.Unary

binds, clear, fork, getBody, isDeterministic, preserves, preserves, setBody

Methods inherited from class eu.bandm.tools.paisley.AbstractPattern

clone

Methods inherited from class java.lang.Object

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

Methods inherited from interface eu.bandm.tools.paisley.Pattern

and, andThen, andThen, clear, cut, enPassant, flatten, limit, matches, matchOnce, narrow, noMatch, or, orElse, orElse, someMatch, uniquely, unlessNull

Constructor Details

Filter

protected Filter(Pattern<? super A> body)

Creates a new pattern.

Parameters:

body - the pattern to match under the restriction implemented by this filter

Throws:

NullPointerException - if body is null

Method Details

of

public static <A> Filter<A> of(Predicate<? super A> pred,
 Pattern<? super A> body)

with

public static <A> Motif<A,A> with(Predicate<? super A> pred)

apply

public final A apply(A target)

Transforms a target to be matched into a target for the subpattern.

This implementations returns target.

Specified by:

apply in class Transform<A,A>

Parameters:

target - the target for this pattern to be matched against.

Returns:

a target for Unary.body to be matched against.