Package org.apache.sis.feature

Class AttributeView.Singleton<V>

java.lang.Object

org.apache.sis.feature.Property

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

org.apache.sis.feature.AbstractAttribute<V>

org.apache.sis.feature.AttributeView<V>

org.apache.sis.feature.AttributeView.Singleton<V>

Type Parameters:

V - the type of attribute values. If the attribute supports multi-occurrences, then this is the type of elements (not the collection type).

All Implemented Interfaces:

Serializable

Enclosing class:

AttributeView<V>

private static final class AttributeView.Singleton<V>
extends AttributeView<V>

Specialization of AttributeView 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.AttributeView

feature, name

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

type

Constructor Summary

Constructors

Constructor	Description
Singleton(AbstractFeature feature, DefaultAttributeType<V> type)	Creates a new attribute which will delegate its work to the given feature.

Method Summary

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

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

characteristics, create, equals, getName, hashCode, setValues, toString

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

characteristicsReadOnly, clone, create, create, getType, 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,
 DefaultAttributeType<V> type)

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

Method Details

getValue

public V getValue()

Returns the single value, or null if none.

Overrides:

getValue in class AttributeView<V>

Returns:

the attribute value (may be null).

See Also:

• AbstractFeature.getPropertyValue(String)

setValue

public void setValue(V value)

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

Overrides:

setValue in class AttributeView<V>

Parameters:

value - the new value, or null for removing all values from this attribute.

See Also:

• AbstractFeature.setPropertyValue(String, Object)

getValues

public Collection<V> getValues()

Wraps the property value in a set.

Overrides:

getValues in class AttributeView<V>

Returns:

the attribute values in a live collection.