Module org.apache.sis.util
Package org.apache.sis.measure
Class NumberRange<E extends Number & Comparable<? super E>>
- Type Parameters:
E- the type of range elements as a subclass ofNumber.
- All Implemented Interfaces:
Serializable,Formattable,CheckedContainer<E>,Emptiable
- Direct Known Subclasses:
MeasurementRange
A range of numbers capable of widening conversions when performing range operations.
NumberRange has no unit of measurement. For a range of physical measurements
with unit of measure, see MeasurementRange.
NumberRange has some capability to convert different number types before to
perform operations. In order to provide both this flexibility and the safety of generic
types, most operations in this class are defined in two versions:
- Methods inherited from the
Rangeparent class (contains,intersect,intersects,unionandsubtract) requires argument or range elements of type<E>. No type conversion is performed. - Methods defined in this class with the
Anysuffix (containsAny,intersectAny,intersectsAny,unionAnyandsubtractAny) are more lenient on the argument or range element type<E>. Widening conversions are performed as needed.
<?>).
Other methods defined in this class:
- Convenience
create(…)static methods for every numeric primitive types. castTo(Class)for casting the range values to another type.transform(MathTransform1D)for applying an arbitrary conversion.
Relationship with standards
NumberRange is the SIS class closest to the
mathematical definition of interval.
It is closely related, while not identical, to the ISO 19123 (Coverage geometry and functions)
definition of "ranges". At the difference of the parent Range class, which can be used only with
discrete coverages, the NumberRange class can
also be used with continuous coverages.
Immutability and thread safety
This class and theMeasurementRange subclasses are immutable, and thus inherently thread-safe.
Other subclasses may or may not be immutable, at implementation choice. But implementers are encouraged
to make sure that all subclasses remain immutable for more predictable behavior.
Shared instances
Note: following is implementation details provided for information purpose. The caching policy may change in any SIS version.All create static methods may return a shared instance. Those methods are preferred
to the constructors when the range is expected to have a long lifetime, typically as instance
given to parameter descriptor.
Other methods do not check for shared instances, since the created object is often temporary.
- Since:
- 0.3
- See Also:
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Constructor Summary
ConstructorsConstructorDescriptionNumberRange(Class<E> type, E minValue, boolean isMinIncluded, E maxValue, boolean isMaxIncluded) Constructs a range ofNumberobjects.NumberRange(Class<E> type, ValueRange range) Constructs a range of the given type with values from the given annotation.NumberRange(Range<E> range) Constructs a range with the same type and the same values than the specified range. -
Method Summary
Modifier and TypeMethodDescriptionstatic <N extends Number & Comparable<? super N>>
NumberRange<N> castOrCopy(Range<N> range) Returns the specifiedRangeas aNumberRangeobject.<N extends Number & Comparable<? super N>>
NumberRange<N> Casts this range to the specified type.booleancontainsAny(Number value) Returnstrueif this range contains the given value.booleancontainsAny(NumberRange<?> range) Returnstrueif the supplied range is fully contained within this range.static NumberRange<Byte> create(byte minValue, boolean isMinIncluded, byte maxValue, boolean isMaxIncluded) Constructs a range ofbytevalues.static NumberRange<Double> create(double minValue, boolean isMinIncluded, double maxValue, boolean isMaxIncluded) Constructs a range ofdoublevalues.static NumberRange<Float> create(float minValue, boolean isMinIncluded, float maxValue, boolean isMaxIncluded) Constructs a range offloatvalues.static NumberRange<Integer> create(int minValue, boolean isMinIncluded, int maxValue, boolean isMaxIncluded) Constructs a range ofintvalues.static NumberRange<Long> create(long minValue, boolean isMinIncluded, long maxValue, boolean isMaxIncluded) Constructs a range oflongvalues.static NumberRange<Short> create(short minValue, boolean isMinIncluded, short maxValue, boolean isMaxIncluded) Constructs a range ofshortvalues.static <N extends Number & Comparable<? super N>>
NumberRange<N> Constructs a range containing a single value of the given type.static NumberRange<?> createBestFit(boolean asFloat, Number minValue, boolean isMinIncluded, Number maxValue, boolean isMaxIncluded) Constructs a range using the smallest integer type or floating point type that can hold the given values.static NumberRange<?> createBestFit(Number minValue, boolean isMinIncluded, Number maxValue, boolean isMaxIncluded) Constructs a range using the smallest type ofNumberthat can hold the given values.static NumberRange<Integer> createLeftBounded(int minValue, boolean isMinIncluded) Constructs a range ofintvalues without upper bound.doubleReturns the maximum value as adouble.doublegetMaxDouble(boolean inclusive) Returns the maximum value with the specified inclusive or exclusive state.doubleComputes the average of minimum and maximum values.doubleReturns the minimum value as adouble.doublegetMinDouble(boolean inclusive) Returns the minimum value with the specified inclusive or exclusive state.doublegetSpan()Computes the difference between minimum and maximum values.NumberRange<?> intersectAny(NumberRange<?> range) Returns the union of this range with the given range.booleanintersectsAny(NumberRange<?> range) Returnstrueif the supplied range intersects this range.NumberRange<?>[]subtractAny(NumberRange<?> range) Returns the range of values that are in this range but not in the given range.NumberRange<?> transform(MathTransform1D converter) Returns this range converted using the given converter.NumberRange<?> unionAny(NumberRange<?> range) Returns the union of this range with the given range.Methods inherited from class Range
contains, contains, equals, formatTo, getElementType, getMaxValue, getMinValue, hashCode, intersect, intersects, isBounded, isEmpty, isMaxIncluded, isMinIncluded, subtract, toString, union
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Constructor Details
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NumberRange
Constructs a range with the same type and the same values than the specified range. This is a copy constructor.- Parameters:
range- the range to copy. The elements must beNumberinstances.
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NumberRange
Constructs a range of the given type with values from the given annotation. This constructor does not verify if the given type is wide enough for the values of the given annotation, because those information are usually static. If nevertheless the given type is not wide enough, then the values are truncated in the same way than the Java language casts primitive types. -
NumberRange
public NumberRange(Class<E> type, E minValue, boolean isMinIncluded, E maxValue, boolean isMaxIncluded) Constructs a range ofNumberobjects.- Parameters:
type- the element type, usually one ofByte,Short,Integer,Long,FloatorDouble.minValue- the minimal value, ornullif none.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value, ornullif none.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.
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Method Details
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create
public static <N extends Number & Comparable<? super N>> NumberRange<N> create(Class<N> type, N value) Constructs a range containing a single value of the given type. The given value is used as the minimum and maximum values, inclusive. -
create
public static NumberRange<Byte> create(byte minValue, boolean isMinIncluded, byte maxValue, boolean isMaxIncluded) Constructs a range ofbytevalues. If the minimum is greater than the maximum, then the range is empty. This method may return a shared instance, at implementation choice.- Parameters:
minValue- the minimal value.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range of numeric values for the given endpoints.
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create
public static NumberRange<Short> create(short minValue, boolean isMinIncluded, short maxValue, boolean isMaxIncluded) Constructs a range ofshortvalues. If the minimum is greater than the maximum, then the range is empty. This method may return a shared instance, at implementation choice.- Parameters:
minValue- the minimal value.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range of numeric values for the given endpoints.
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create
public static NumberRange<Integer> create(int minValue, boolean isMinIncluded, int maxValue, boolean isMaxIncluded) Constructs a range ofintvalues. If the minimum is greater than the maximum, then the range is empty. This method may return a shared instance, at implementation choice.- Parameters:
minValue- the minimal value.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range of numeric values for the given endpoints.
- See Also:
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create
public static NumberRange<Long> create(long minValue, boolean isMinIncluded, long maxValue, boolean isMaxIncluded) Constructs a range oflongvalues. If the minimum is greater than the maximum, then the range is empty. This method may return a shared instance, at implementation choice.- Parameters:
minValue- the minimal value.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range of numeric values for the given endpoints.
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create
public static NumberRange<Float> create(float minValue, boolean isMinIncluded, float maxValue, boolean isMaxIncluded) Constructs a range offloatvalues. The minimum and maximum values cannot be NaN but can be infinite. If the minimum is greater than the maximum, then the range is empty. This method may return a shared instance, at implementation choice.- Parameters:
minValue- the minimal value, orFloat.NEGATIVE_INFINITYif none.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value, orFloat.POSITIVE_INFINITYif none.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range of numeric values for the given endpoints.
- Throws:
IllegalArgumentException- ifFloat.isNaN(float)istruefor a given value.
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create
public static NumberRange<Double> create(double minValue, boolean isMinIncluded, double maxValue, boolean isMaxIncluded) Constructs a range ofdoublevalues. The minimum and maximum values cannot be NaN but can be infinite. If the minimum is greater than the maximum, then the range is empty. This method may return a shared instance, at implementation choice.- Parameters:
minValue- the minimal value, orDouble.NEGATIVE_INFINITYif none.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value, orDouble.POSITIVE_INFINITYif none.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range of numeric values for the given endpoints.
- Throws:
IllegalArgumentException- ifDouble.isNaN(double)istruefor a given value.
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createBestFit
public static NumberRange<?> createBestFit(Number minValue, boolean isMinIncluded, Number maxValue, boolean isMaxIncluded) Constructs a range using the smallest type ofNumberthat can hold the given values. The given numbers do not need to be of the same type since they will be casted as needed. More specifically this method returns:NumberRange<Byte>if the given values are integers between 0x80 and 0x7f inclusive.NumberRange<Short>if the given values are integers between -32768 and 32767 inclusive.NumberRange<Integer>if the given values are integers between -2147483648 and 2147483647 inclusive.NumberRange<Long>if the given values are integers between -9223372036854775808L and 9223372036854775807L inclusive.NumberRange<Float>if the given values can be casted tofloatvalues without data lost.NumberRange<Double>if none of the above types is suitable.
- Parameters:
minValue- the minimal value, ornullif none.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value, ornullif none.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range, or
nullif bothminValueandmaxValuearenull. - Throws:
IllegalArgumentException- if the given numbers are not primitive wrappers for numeric types.
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createBestFit
public static NumberRange<?> createBestFit(boolean asFloat, Number minValue, boolean isMinIncluded, Number maxValue, boolean isMaxIncluded) Constructs a range using the smallest integer type or floating point type that can hold the given values. IfasFloatisfalse, then the returned range can use any wrapper type and this method behaves as described in above method. IfasFloatistrue, then the returned range is restricted toFloatandDoublenumber types; integer types are casted to one of the floating point types.- Parameters:
asFloat- whether to restrict the returned range to floating point types.minValue- the minimal value, ornullif none.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.maxValue- the maximal value, ornullif none.isMaxIncluded-trueif the maximal value is inclusive, orfalseif exclusive.- Returns:
- the new range, or
nullif bothminValueandmaxValuearenull. - Throws:
IllegalArgumentException- if the given numbers are not primitive wrappers for numeric types.- Since:
- 1.2
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createLeftBounded
Constructs a range ofintvalues without upper bound. This method may return a shared instance, at implementation choice.API note
For creating left-bounded ranges of floating point values, use one of thecreate(…)methods with aPOSITIVE_INFINITYconstant. We do not provide variants for other integer types because this method is typically invoked for defining the multiplicity of an attribute.- Parameters:
minValue- the minimal value.isMinIncluded-trueif the minimal value is inclusive, orfalseif exclusive.- Returns:
- the new range of numeric values from
minValueto positive infinity. - Since:
- 0.5
- See Also:
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castOrCopy
Returns the specifiedRangeas aNumberRangeobject. If the specified range is already an instance ofNumberRange, then it is returned unchanged. Otherwise a new number range is created using the copy constructor.- Type Parameters:
N- the type of elements in the given range.- Parameters:
range- the range to cast or copy.- Returns:
- the same range than
rangeas aNumberRangeobject.
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castTo
public <N extends Number & Comparable<? super N>> NumberRange<N> castTo(Class<N> type) throws IllegalArgumentException Casts this range to the specified type. If the cast from this range type to the given type is a narrowing conversion, then the cast is performed according the rules of the Java language: the high-order bytes are silently dropped.- Type Parameters:
N- the class to cast to.- Parameters:
type- the class to cast to. Must be one ofByte,Short,Integer,Long,FloatorDouble.- Returns:
- the casted range, or
thisif this range already uses the specified type. - Throws:
IllegalArgumentException- if the given type is not one of the primitive wrappers for numeric types.
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getMinDouble
public double getMinDouble()Returns the minimum value as adouble. If this range is unbounded, thenDouble.NEGATIVE_INFINITYis returned.- Returns:
- the minimum value.
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getMinDouble
public double getMinDouble(boolean inclusive) Returns the minimum value with the specified inclusive or exclusive state. If this range is unbounded, thenDouble.NEGATIVE_INFINITYis returned.- Parameters:
inclusive-truefor the minimum value inclusive, orfalsefor the minimum value exclusive.- Returns:
- the minimum value, inclusive or exclusive as requested.
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getMaxDouble
public double getMaxDouble()Returns the maximum value as adouble. If this range is unbounded, thenDouble.POSITIVE_INFINITYis returned.- Returns:
- the maximum value.
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getMaxDouble
public double getMaxDouble(boolean inclusive) Returns the maximum value with the specified inclusive or exclusive state. If this range is unbounded, thenDouble.POSITIVE_INFINITYis returned.- Parameters:
inclusive-truefor the maximum value inclusive, orfalsefor the maximum value exclusive.- Returns:
- the maximum value, inclusive or exclusive as requested.
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getMedian
public double getMedian()Computes the average of minimum and maximum values. If numbers are integers, the average is computed using inclusive values (e.g. equivalent togetMinDouble(true)). Otherwise the minimum and maximum values are used as-is (because making them inclusive is considered an infinitely small change).Special cases:
- If one bound is infinite, the return value is the same infinity.
- If the two bounds are infinite, the return value is
Double.NaN. - If the range is empty, the return value is
Double.NaN. - If a bound is NaN, the return value is the same NaN (reminder: multiple NaN values are possible).
- Returns:
- (minimum + maximum) / 2 computed using inclusive values.
- Since:
- 1.1
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getSpan
public double getSpan()Computes the difference between minimum and maximum values. If numbers are integers, the difference is computed using inclusive values (e.g. usinggetMinDouble(true)). Otherwise the minimum and maximum values are used as-is (because making them inclusive is considered an infinitely small change).Special cases:
- If the range is empty, the return value is 0.
- If at least one bound is infinite, the return value is
Double.POSITIVE_INFINITY. - If a bound is NaN, the return value is the same NaN (reminder: multiple NaN values are possible).
- Returns:
- (maximum − minimum) computed using inclusive values.
- Since:
- 1.1
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containsAny
Returnstrueif this range contains the given value. This method convertsthisor the given argument to the widest numeric type, then performs the same work thanRange.contains(Comparable).- Parameters:
value- the value to check for inclusion in this range, ornull.- Returns:
trueif the given value is non-null and included in this range.- Throws:
IllegalArgumentException- if the given range cannot be converted to a valid type through widening conversion.
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containsAny
Returnstrueif the supplied range is fully contained within this range. This method convertsthisor the given argument to the widest numeric type, then delegates toRange.contains(Range).- Parameters:
range- the range to check for inclusion in this range.- Returns:
trueif the given range is included in this range.- Throws:
IllegalArgumentException- if the given range cannot be converted to a valid type through widening conversion, or if the units of measurement are not convertible.
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intersectsAny
Returnstrueif the supplied range intersects this range. This method convertsthisor the given argument to the widest numeric type, then delegates toRange.intersects(Range).- Parameters:
range- the range to check for intersection with this range.- Returns:
trueif the given range intersects this range.- Throws:
IllegalArgumentException- if the given range cannot be converted to a valid type through widening conversion, or if the units of measurement are not convertible.
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intersectAny
Returns the union of this range with the given range. This method convertsthisor the given argument to the widest numeric type, then delegates toRange.intersect(Range).- Parameters:
range- the range to add to this range.- Returns:
- the intersection of this range with the given range.
- Throws:
IllegalArgumentException- if the given range cannot be converted to a valid type through widening conversion, or if the units of measurement are not convertible.
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unionAny
Returns the union of this range with the given range. This method convertsthisor the given argument to the widest numeric type, then delegates toRange.union(Range).- Parameters:
range- the range to add to this range.- Returns:
- the union of this range with the given range.
- Throws:
IllegalArgumentException- if the given range cannot be converted to a valid type through widening conversion, or if the units of measurement are not convertible.
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subtractAny
Returns the range of values that are in this range but not in the given range. This method convertsthisor the given argument to the widest numeric type, then delegates toRange.subtract(Range).- Parameters:
range- the range to subtract.- Returns:
- this range without the given range, as an array of length 0, 1 or 2.
- Throws:
IllegalArgumentException- if the given range cannot be converted to a valid type through widening conversion, or if the units of measurement are not convertible.
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transform
Returns this range converted using the given converter.- Parameters:
converter- the converter to apply.- Returns:
- the converted range, or
thisif the result is the same as this range. - Throws:
TransformException- if an error occurred during the conversion.- Since:
- 1.3
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