Package org.apache.sis.internal.converter

Class FractionConverter.FromInteger

java.lang.Object

org.apache.sis.internal.converter.ClassPair<S,T>

org.apache.sis.internal.converter.SystemConverter<Integer,Fraction>

org.apache.sis.internal.converter.FractionConverter.FromInteger

All Implemented Interfaces:

Serializable, Function<Integer,Fraction>, ObjectConverter<Integer,Fraction>

Enclosing class:

FractionConverter

public static final class FractionConverter.FromInteger
extends SystemConverter<Integer,Fraction>

The inverse of FractionConverter.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final FractionConverter.FromInteger	INSTANCE	The unique instance of this converter.
private static final long	serialVersionUID	For cross-version compatibility.

Fields inherited from class org.apache.sis.internal.converter.ClassPair

sourceClass, targetClass

Constructor Summary

Constructors

Constructor	Description
FromInteger()	Creates a new converter.

Method Summary

Modifier and Type	Method	Description
Fraction	apply(Integer value)	Creates a new fraction from the given integer.
ObjectConverter<Fraction,Integer>	inverse()	Default to non-invertible conversion.
Set<FunctionProperty>	properties()	Returns the manner in which source values (S) are mapped to target values (T).
ObjectConverter<Integer,Fraction>	unique()	Returns an unique instance of this converter if one exists.

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

bijective, equals, formatErrorMessage, getSourceClass, getTargetClass, readResolve

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

cast, hashCode, parentSource, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, 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

public static final FractionConverter.FromInteger INSTANCE

The unique instance of this converter.

Constructor Details

FromInteger

public FromInteger()

Creates a new converter. Only one instance is enough, but this constructor needs to be public for allowing invocation by ServiceLoader.

Method Details

unique

public ObjectConverter<Integer,Fraction> unique()

Description copied from class: SystemConverter

Returns an unique instance of this converter if one exists. If a converter already exists for the same source an target classes, then this converter is returned. Otherwise this converter is returned without being cached.

Overrides:

unique in class SystemConverter<Integer,Fraction>

Returns:

the unique instance, or this if no unique instance can be found.

See Also:

• ObjectToString.unique()

inverse

public ObjectConverter<Fraction,Integer> inverse()

Description copied from class: SystemConverter

Default to non-invertible conversion. Must be overridden by subclasses that support inversions.

Specified by:

inverse in interface ObjectConverter<Integer,Fraction>

Overrides:

inverse in class SystemConverter<Integer,Fraction>

Returns:

a converter for converting instances of T back to instances of S.

See Also:

• FunctionProperty.INVERTIBLE

properties

public Set<FunctionProperty> properties()

Description copied from interface: ObjectConverter

Returns the manner in which source values (S) are mapped to target values (T). Some possible function properties are:

• Injective if no pair of S can produce the same T value (e.g.: conversions from Integer to String).
• Surjective if every values of T can be created from one or many values of S (e.g.: conversions from String to Integer).
• Bijective if there is a one-to-one relationship between the S and T values.
• Order preserving if any sequence of increasing S values (in the sense of Comparable) is mapped to a sequence of increasing T values.
• Order reversing if any sequence of increasing S values (in the sense of Comparable) is mapped to a sequence of decreasing T values.

Note that if the ObjectConverter.apply(Object) method returns null for unconvertible source values, then this properties set cannot contain FunctionProperty.INJECTIVE because more than one source value could be converted to the same null target value.

Returns:

the manners in which source values are mapped to target values. May be an empty set, but never null.

apply

public Fraction apply(Integer value)

Creates a new fraction from the given integer.

Parameters:

value - the integer to convert.

Returns:

a fraction equals to the given integer.