uk.ac.ed.epcc.webapp.model.data

Class MultiFieldConstraint

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractSet<E>

java.util.HashSet<E>

java.util.LinkedHashSet<FieldConstraint>

uk.ac.ed.epcc.webapp.model.data.MultiFieldConstraint

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<FieldConstraint>, java.util.Collection<FieldConstraint>, java.util.Set<FieldConstraint>, FieldConstraint

public class MultiFieldConstraint
extends java.util.LinkedHashSet<FieldConstraint>
implements FieldConstraint

A composite FieldConstraint. The constaints are added in order

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MultiFieldConstraint(FieldConstraint... constraints)

Method Summary

Modifier and Type	Method and Description
boolean	add(FieldConstraint e)
<I extends Input> Selector<I>	apply(boolean support_multi_stage, java.lang.String field, Selector<I> sel, Form form, java.util.HashMap fixtures) Mutate a Selector based on other form fields.

Methods inherited from class java.util.LinkedHashSet

spliterator

Methods inherited from class java.util.HashSet

clear, clone, contains, isEmpty, iterator, remove, size

Methods inherited from class java.util.AbstractSet

equals, hashCode, removeAll

Methods inherited from class java.util.AbstractCollection

addAll, containsAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface uk.ac.ed.epcc.webapp.model.data.FieldConstraint

add

Methods inherited from interface java.util.Set

addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Methods inherited from interface java.util.Collection

parallelStream, removeIf, stream

Methods inherited from interface java.lang.Iterable

forEach

Constructor Detail

MultiFieldConstraint

public MultiFieldConstraint(FieldConstraint... constraints)

Method Detail

add

public boolean add(FieldConstraint e)

Specified by:

add in interface java.util.Collection<FieldConstraint>

Specified by:

add in interface java.util.Set<FieldConstraint>

Overrides:

add in class java.util.HashSet<FieldConstraint>

apply

public <I extends Input> Selector<I> apply(boolean support_multi_stage,
                                           java.lang.String field,
                                           Selector<I> sel,
                                           Form form,
                                           java.util.HashMap fixtures)

Description copied from interface: FieldConstraint

Mutate a Selector based on other form fields. Normally this requires the value of the input to have a fixed value e.g. an UnmodifiableInput, a ListInput with a single valid option or a suppressed field. If the prerequisite fields are not fixed or not present then this method can return null to request an additional form stage be introduced. The form builder should then retry this field in subsequent stages (where previous fields will be locked). Fixed values are copied into the fixtures map. This also can contain values for supressed fields. Care needs to be taken with pre-requisites that are optional. Ideally if support_multi_stage is false the method should add a corresponding FormValidator to the form instead and return the original Selector

Specified by:

apply in interface FieldConstraint

Type Parameters:

I - type of Input

Parameters:

support_multi_stage - Does surrounding context support multi-stage

field - Field that Selector is for

sel - Selector

form - Form being built.

fixtures - HashMap of fixed field data. This can include supressed fields. note values of optional fields may be null.

Returns:

mutated Selector or null to request an additional form stage.