Package org.apache.sis.measure

Class SystemUnit.DimToUnit

java.lang.Object

org.apache.sis.internal.converter.SurjectiveConverter<UnitDimension,SystemUnit<?>>

org.apache.sis.measure.SystemUnit.DimToUnit

All Implemented Interfaces:

Serializable, Function<UnitDimension,SystemUnit<?>>, ObjectConverter<UnitDimension,SystemUnit<?>>

Enclosing class:

SystemUnit<Q extends javax.measure.Quantity<Q>>

private static final class SystemUnit.DimToUnit
extends SurjectiveConverter<UnitDimension,SystemUnit<?>>
implements Serializable

The converter for replacing the keys in the SystemUnit.getBaseUnits() map from UnitDimension instances to SystemUnit instances. We apply conversions on the fly instead of extracting the data in a new map once for all because the copy may fail if an entry contains a rational instead of an integer power. With on-the-fly conversions, the operation will not fail if the user never ask for that particular value.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final SystemUnit.DimToUnit	INSTANCE	The unique instance used by SystemUnit.getBaseUnits().
private static final long	serialVersionUID	For cross-version compatibility.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	DimToUnit()	Constructor for the singleton INSTANCE.

Method Summary

Modifier and Type	Method	Description
SystemUnit<?>	apply(UnitDimension dim)	Returns the unit associated to the given dimension, or null if none.
Class<UnitDimension>	getSourceClass()	Returns the type of key values in the map returned by UnitDimension.getBaseDimensions().
Class<SystemUnit<?>>	getTargetClass()	Returns the type of key values in the map to be returned by SystemUnit.getBaseUnits().
(package private) Object	readResolve()	Invoked on deserialization for replacing the deserialized instance by the unique instance.

Methods inherited from class org.apache.sis.internal.converter.SurjectiveConverter

inverse, properties, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Function

andThen, compose

Field Details

serialVersionUID

private static final long serialVersionUID

For cross-version compatibility.

See Also:

• Constant Field Values

INSTANCE

static final SystemUnit.DimToUnit INSTANCE

The unique instance used by SystemUnit.getBaseUnits().

Constructor Details

DimToUnit

private DimToUnit()

Constructor for the singleton INSTANCE.

Method Details

getSourceClass

public Class<UnitDimension> getSourceClass()

Returns the type of key values in the map returned by UnitDimension.getBaseDimensions().

Specified by:

getSourceClass in interface ObjectConverter<UnitDimension,SystemUnit<?>>

Returns:

the type of objects to convert.

getTargetClass

public Class<SystemUnit<?>> getTargetClass()

Returns the type of key values in the map to be returned by SystemUnit.getBaseUnits().

Specified by:

getTargetClass in interface ObjectConverter<UnitDimension,SystemUnit<?>>

Returns:

the type of converted objects.

apply

public SystemUnit<?> apply(UnitDimension dim)

Returns the unit associated to the given dimension, or null if none.

Specified by:

apply in interface Function<UnitDimension,SystemUnit<?>>

Specified by:

apply in interface ObjectConverter<UnitDimension,SystemUnit<?>>

Parameters:

dim - the object to convert, or null.

Returns:

the converted object, or null.

readResolve

Object readResolve()
            throws ObjectStreamException

Invoked on deserialization for replacing the deserialized instance by the unique instance.

Throws:

ObjectStreamException