net.sf.saxon.om

Interface AtomicSequence

All Superinterfaces:

GroundedValue, Sequence

All Known Implementing Classes:

AnyURIValue, AtomicArray, AtomicValue, Base64BinaryValue, BigIntegerValue, BooleanValue, CalendarValue, DateTimeValue, DateValue, DayTimeDurationValue, DecimalValue, DoubleValue, DurationValue, EmptyAtomicSequence, FloatValue, GDateValue, GDayValue, GMonthDayValue, GMonthValue, GYearMonthValue, GYearValue, HexBinaryValue, Int64Value, IntegerRange, IntegerValue, NotationValue, NumericValue, QNameValue, QualifiedNameValue, StringValue, TimeValue, UntypedAtomicValue, YearMonthDurationValue

public interface AtomicSequence
extends Sequence, GroundedValue

Interface representing a sequence of atomic values. This is often used to represent the typed value of a node. In most cases the typed value of a node is a single atomic value, so the class AtomicValue implements this interface.

An AtomicSequence is always represented as a GroundedValue: that is, the entire sequence is in memory, making operations such as itemAt(int) and getLength() possible.

Method Summary

Methods

Modifier and Type	Method and Description
CharSequence	getCanonicalLexicalRepresentation() Get the canonical lexical representation as defined in XML Schema.
int	getLength() Get the size of the value (the number of items)
Comparable	getSchemaComparable() Get a Comparable value that implements the XML Schema ordering comparison semantics for this value.
String	getStringValue() Get the string value of this sequence.
CharSequence	getStringValueCS() Get the string value of this sequence.
AtomicValue	head() Get the first item in the sequence.
AtomicValue	itemAt(int n) Get the n'th item in the value, counting from 0
SequenceIterator<? extends AtomicValue>	iterate() Get an iterator performance characteristics, though all should exhibit the same behaviour.over all the items in the sequence

Methods inherited from interface net.sf.saxon.om.GroundedValue

effectiveBooleanValue, reduce, subsequence

Method Detail

head

AtomicValue head()

Description copied from interface: Sequence

Get the first item in the sequence.

Specified by:

head in interface Sequence

Returns:

the first item in the sequence if there is one, or null if the sequence is empty

iterate

SequenceIterator<? extends AtomicValue> iterate()

Description copied from interface: Sequence

Get an iterator performance characteristics, though all should exhibit the same behaviour.over all the items in the sequence

Specified by:

iterate in interface Sequence

Returns:

an iterator over all the items

itemAt

AtomicValue itemAt(int n)

Description copied from interface: GroundedValue

Get the n'th item in the value, counting from 0

Specified by:

itemAt in interface GroundedValue

Parameters:

n - the index of the required item, with 0 representing the first item in the sequence

Returns:

the n'th item if it exists, or null otherwise

getLength

int getLength()

Description copied from interface: GroundedValue

Get the size of the value (the number of items)

Specified by:

getLength in interface GroundedValue

Returns:

the number of items in the sequence

getCanonicalLexicalRepresentation

CharSequence getCanonicalLexicalRepresentation()

Get the canonical lexical representation as defined in XML Schema. This is not always the same as the result of casting to a string according to the XPath rules.

Returns:

the canonical lexical representation if defined in XML Schema; otherwise, the result of casting to string according to the XPath 2.0 rules

getSchemaComparable

Comparable getSchemaComparable()

Get a Comparable value that implements the XML Schema ordering comparison semantics for this value. The default implementation is written to compare sequences of atomic values. This method is overridden for AtomicValue and its subclasses.

In the case of data types that are partially ordered, the returned Comparable extends the standard semantics of the compareTo() method by returning the value SequenceTool.INDETERMINATE_ORDERING when there is no defined order relationship between two given values.

Returns:

a Comparable that follows XML Schema comparison rules

getStringValueCS

CharSequence getStringValueCS()

Description copied from interface: GroundedValue

Get the string value of this sequence. The string value of an item is the result of applying the string() function. The string value of a sequence is the space-separated result of applying the string-join() function using a single space as the separator

Specified by:

getStringValueCS in interface GroundedValue

Returns:

the string value of the sequence.

getStringValue

String getStringValue()

Description copied from interface: GroundedValue

Get the string value of this sequence. The string value of an item is the result of applying the string() function. The string value of a sequence is the space-separated result of applying the string-join() function using a single space as the separator

Specified by:

getStringValue in interface GroundedValue

Returns:

the string value of the sequence.