Package net.sf.saxon.value

Class SequenceExtent

java.lang.Object

net.sf.saxon.value.SequenceExtent

All Implemented Interfaces:

GroundedValue, Sequence

Direct Known Subclasses:

SequenceExtent.Of

public abstract class SequenceExtent
extends Object
implements GroundedValue

A sequence value implemented extensionally. That is, this class represents a sequence by allocating memory to each item in the sequence.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SequenceExtent.Of<T extends Item>

Constructor Summary

Constructors

Constructor	Description
SequenceExtent()

Method Summary

Modifier and Type	Method	Description
static SequenceExtent.Of<Item>	from(SequenceIterator iter)	Construct a sequence containing all the remaining items in a SequenceIterator.
static GroundedValue	makeResidue(SequenceIterator iter)	Factory method to make a GroundedValue holding the remaining contents of any SequenceIterator, that is, the contents that have not yet been read
static <T extends Item> GroundedValue	makeSequenceExtent(List<T> input)	Factory method to make a Value holding the contents of any List of items
abstract SequenceIterator	reverseIterate()

Methods inherited from class java.lang.Object

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

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

asIterable, concatenate, containsNode, effectiveBooleanValue, getLength, getStringValue, getUnicodeStringValue, head, itemAt, iterate, materialize, reduce, subsequence, toShortString

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

makeRepeatable

Constructor Details

SequenceExtent

public SequenceExtent()

Method Details

from

public static SequenceExtent.Of<Item> from(SequenceIterator iter)

Construct a sequence containing all the remaining items in a SequenceIterator.

Parameters:

iter - The supplied sequence of items. The returned sequence will contain all items delivered by repeated calls on next() on this iterator, and the iterator will be consumed by calling the method.

Returns:

a sequence of the remaining items

Throws:

UncheckedXPathException - if reading the items using the SequenceIterator raises an error

makeResidue

public static GroundedValue makeResidue(SequenceIterator iter)

Factory method to make a GroundedValue holding the remaining contents of any SequenceIterator, that is, the contents that have not yet been read

Parameters:

iter - a Sequence iterator that may or may not be consumed to deliver the items in the sequence. The iterator need not be positioned at the start.

Returns:

a GroundedValue holding the items delivered by the SequenceIterator. If the sequence is empty the result will be an instance of EmptySequence. If it is of length one, the result will be an Item. In all other cases, it will be an instance of SequenceExtent.

Throws:

UncheckedXPathException - if an error occurs processing the values from the iterator.

makeSequenceExtent

public static <T extends Item> GroundedValue makeSequenceExtent(List<T> input)

Factory method to make a Value holding the contents of any List of items

Type Parameters:

T - the type of items in the list

Parameters:

input - a List containing the items in the sequence. The caller guarantees that the list will not be subsequently modified.

Returns:

a grounded sequence holding the items in the list. If the sequence is empty the result will be an instance of EmptySequence. If it is of length one, the result will be an Item. In all other cases, it will be an instance of SequenceExtent.

reverseIterate

public abstract SequenceIterator reverseIterate()