Package org.apache.sis.feature

Class AssociationView.Singleton

java.lang.Object

org.apache.sis.feature.Property

org.apache.sis.feature.Field<AbstractFeature>

org.apache.sis.feature.AbstractAssociation

org.apache.sis.feature.AssociationView

org.apache.sis.feature.AssociationView.Singleton

All Implemented Interfaces:

Serializable, Cloneable

Enclosing class:

AssociationView

private static final class AssociationView.Singleton
extends AssociationView

Specialization of AssociationView when the amount of values can be only zero or one. This implementation takes shortcuts for the getValue() and getValues() methods. This specialization is provided because it is the most common case.

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID	For cross-version compatibility.

Fields inherited from class org.apache.sis.feature.AssociationView

feature, name

Fields inherited from class org.apache.sis.feature.AbstractAssociation

role

Constructor Summary

Constructors

Constructor	Description
Singleton(AbstractFeature feature, DefaultAssociationRole role)	Creates a new association which will delegate its work to the given feature.

Method Summary

Modifier and Type	Method	Description
AbstractFeature	getValue()	Returns the single value, or null if none.
Collection<AbstractFeature>	getValues()	Wraps the property value in a set.
void	setValue(AbstractFeature value)	Sets the value of this association.

Methods inherited from class org.apache.sis.feature.AssociationView

create, equals, getName, hashCode, setValues, toString

Methods inherited from class org.apache.sis.feature.AbstractAssociation

clone, create, create, ensureValid, getRole, quality

Methods inherited from class org.apache.sis.feature.Field

isDeprecated, isSingleton

Methods inherited from class java.lang.Object

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

Field Details

serialVersionUID

private static final long serialVersionUID

For cross-version compatibility.

See Also:

• Constant Field Values

Constructor Details

Singleton

Singleton(AbstractFeature feature,
 DefaultAssociationRole role)

Creates a new association which will delegate its work to the given feature.

Method Details

getValue

public AbstractFeature getValue()

Returns the single value, or null if none.

Overrides:

getValue in class AssociationView

Returns:

the associated feature (may be null).

See Also:

• AbstractFeature.getPropertyValue(String)

setValue

public void setValue(AbstractFeature value)

Sets the value of this association. This method assumes that the Feature.setPropertyValue(String, Object) implementation will verify the argument type.

Overrides:

setValue in class AssociationView

Parameters:

value - the new value, or null.

See Also:

• AbstractFeature.setPropertyValue(String, Object)

getValues

public Collection<AbstractFeature> getValues()

Wraps the property value in a set.

Overrides:

getValues in class AssociationView

Returns:

the features in a live collection.