com.clarkparsia.pellet.datatypes

Class EmptyDataRange<T>

java.lang.Object

com.clarkparsia.pellet.datatypes.EmptyDataRange<T>

All Implemented Interfaces:

DataRange<T>

Direct Known Subclasses:

EmptyRestrictedDatatype

public class EmptyDataRange<T>
extends Object
implements DataRange<T>

Title: Empty Data Range

Description: Re-usable empty data range implementation. Cannot be static so that parameterization is handled correctly.

Copyright: Copyright (c) 2009

Company: Clark & Parsia, LLC.

Author:

Mike Smith

Constructor Summary

Constructors

Constructor and Description
EmptyDataRange()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	contains(Object value) Check if a data range contains a particular value
boolean	containsAtLeast(int n) Check that a data range contains a minimum number of elements
T	getValue(int i) Return a value from an enumerable data range.
boolean	isEmpty() Convenience method equivalent to !containsAtLeast(0)
boolean	isEnumerable() Query if values in the data range can be enumerated.
boolean	isFinite() Query if there are a finite number of values in the data range.
int	size() Return the size of the data range.
Iterator<T>	valueIterator() Get a (possibly infinite) iterator over values in the data range.

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyDataRange

public EmptyDataRange()

Method Detail

contains

public boolean contains(Object value)

Description copied from interface: DataRange

Check if a data range contains a particular value

Specified by:

contains in interface DataRange<T>

Parameters:

value - the value to check

Returns:

true if the data range contains value, false else

containsAtLeast

public boolean containsAtLeast(int n)

Description copied from interface: DataRange

Check that a data range contains a minimum number of elements

Specified by:

containsAtLeast in interface DataRange<T>

Parameters:

n - the number of elements

Returns:

true if the data range contains n or more elements, false otherwise

getValue

public T getValue(int i)

Description copied from interface: DataRange

Return a value from an enumerable data range. Necessary to support LiteralValueBranch shiftTryNext

Specified by:

getValue in interface DataRange<T>

Parameters:

i - the index of the value in the data range

Returns:

the value

isEmpty

public boolean isEmpty()

Description copied from interface: DataRange

Convenience method equivalent to !containsAtLeast(0)

Specified by:

isEmpty in interface DataRange<T>

Returns:

true if the data range contains no elements, false otherwise

isEnumerable

public boolean isEnumerable()

Description copied from interface: DataRange

Query if values in the data range can be enumerated.

Specified by:

isEnumerable in interface DataRange<T>

Returns:

true if the data range is enumerable, false otherwise

isFinite

public boolean isFinite()

Description copied from interface: DataRange

Query if there are a finite number of values in the data range.

Specified by:

isFinite in interface DataRange<T>

Returns:

true if the data range is finite, false otherwise

size

public int size()

Description copied from interface: DataRange

Return the size of the data range. Necessary to support LiteralValueBranch constructor

Specified by:

size in interface DataRange<T>

Returns:

the size of the data range

valueIterator

public Iterator<T> valueIterator()

Description copied from interface: DataRange

Get a (possibly infinite) iterator over values in the data range.

Specified by:

valueIterator in interface DataRange<T>

Returns:

an Iterator