net.sf.saxon.s9api

Enum OccurrenceIndicator

java.lang.Object

java.lang.Enum<OccurrenceIndicator>

net.sf.saxon.s9api.OccurrenceIndicator

All Implemented Interfaces:

Serializable, Comparable<OccurrenceIndicator>

public enum OccurrenceIndicator
extends Enum<OccurrenceIndicator>

Represents one of the possible occurrence indicators in a SequenceType. The four standard values are ONE (no occurrence indicator), ZERO_OR_ONE (?), ZERO_OR_MORE (*), ONE_OR_MORE (+). In addition the value ZERO is supported: this is used only in the type empty-sequence() which matches an empty sequence and nothing else.

Enum Constant Summary

Enum Constants

Enum Constant and Description
ONE
ONE_OR_MORE
ZERO
ZERO_OR_MORE
ZERO_OR_ONE

Method Summary

Methods

Modifier and Type	Method and Description
boolean	allowsMany() Ask whether this occurrence indicator permits a sequence containing more than one item.
boolean	allowsZero() Ask whether this occurrence indicator permits an empty sequence.
protected int	getCardinality()
protected static OccurrenceIndicator	getOccurrenceIndicator(int cardinality)
boolean	subsumes(OccurrenceIndicator other) Ask whether one occurrence indicator subsumes another.
String	toString() Return a string representation of the occurrence indicator: one of "*", "+", "?", "0" (exactly zero) or empty string (exactly one)
static OccurrenceIndicator	valueOf(String name) Returns the enum constant of this type with the specified name.
static OccurrenceIndicator[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

ZERO

public static final OccurrenceIndicator ZERO

ZERO_OR_ONE

public static final OccurrenceIndicator ZERO_OR_ONE

ZERO_OR_MORE

public static final OccurrenceIndicator ZERO_OR_MORE

ONE

public static final OccurrenceIndicator ONE

ONE_OR_MORE

public static final OccurrenceIndicator ONE_OR_MORE

Method Detail

values

public static OccurrenceIndicator[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (OccurrenceIndicator c : OccurrenceIndicator.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static OccurrenceIndicator valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getCardinality

protected int getCardinality()

getOccurrenceIndicator

protected static OccurrenceIndicator getOccurrenceIndicator(int cardinality)

allowsZero

public boolean allowsZero()

Ask whether this occurrence indicator permits an empty sequence.

Returns:

true if the occurrence indicator is one of ZERO, ZERO_OR_ONE, or ZERO_OR_MORE

Since:

9.2

allowsMany

public boolean allowsMany()

Ask whether this occurrence indicator permits a sequence containing more than one item.

Returns:

true if the occurrence indicator is one of ZERO_OR_MORE or ONE_OR_MORE

Since:

9.2

subsumes

public boolean subsumes(OccurrenceIndicator other)

Ask whether one occurrence indicator subsumes another. Specifically, A.subsumes(B) is true if every sequence that satisfies the occurrence indicator B also satisfies the occurrence indicator A.

Parameters:

other - The other occurrence indicator

Returns:

true if this occurrence indicator subsumes the other occurrence indicator

Since:

9.1

toString

public String toString()

Return a string representation of the occurrence indicator: one of "*", "+", "?", "0" (exactly zero) or empty string (exactly one)

Overrides:

toString in class Enum<OccurrenceIndicator>

Returns:

a string representation of the occurrence indicator

Since:

9.5