net.sf.saxon.value
public final class SequenceExtent extends Value implements GroundedValue
Constructor Summary | |
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SequenceExtent(Item[] items)
Construct an sequence from an array of items. | |
SequenceExtent(Item[] value, int start, int length)
Construct a SequenceExtent from part of an array of items | |
SequenceExtent(SequenceExtent ext, int start, int length)
Construct a SequenceExtent as a view of another SequenceExtent | |
SequenceExtent(List list)
Construct a SequenceExtent from a List. | |
SequenceExtent(SequenceIterator iter)
Construct a sequence containing all the items in a SequenceIterator.
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Method Summary | |
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boolean | effectiveBooleanValue()
Get the effective boolean value |
int | getCardinality()
Determine the cardinality
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ItemType | getItemType(TypeHierarchy th)
Get the (lowest common) item type
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int | getLength()
Get the number of items in the sequence
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Item | itemAt(int n)
Get the n'th item in the sequence (starting with 0 as the first item)
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SequenceIterator | iterate()
Return an iterator over this sequence.
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static ValueRepresentation | makeSequenceExtent(SequenceIterator iter)
Factory method to make a Value holding the contents of any SequenceIterator |
Value | reduce()
Reduce a value to its simplest form. |
UnfailingIterator | reverseIterate()
Return an enumeration of this sequence in reverse order (used for reverse axes)
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Value | simplify()
Simplify this SequenceExtent |
GroundedValue | subsequence(int start, int length)
Get a subsequence of the value
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void | swap(int a, int b)
Swap two items (needed to support sorting)
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String | toString() |
Parameters: items the array of items to be included in the sequence
Parameters: value The array start zero-based offset of the first item in the array that is to be included in the new SequenceExtent length The number of items in the new SequenceExtent
Parameters: ext The existing SequenceExtent start zero-based offset of the first item in the existing SequenceExtent that is to be included in the new SequenceExtent length The number of items in the new SequenceExtent
Parameters: list the list of items to be included in the sequence
Parameters: iter The supplied sequence of items. This must be positioned at the start, so that hasNext() returns true if there are any nodes in the node-set, and next() returns the first node.
Throws: net.sf.saxon.trans.XPathException if reading the items using the SequenceIterator raises an error
Returns: the cardinality of the sequence, using the constants defined in net.sf.saxon.value.Cardinality
See Also: Cardinality
Parameters: th the type hierarchy cache
Returns: integer identifying an item type to which all the items in this sequence conform
Returns: the number of items in the sequence
Parameters: n the position of the required item
Returns: the n'th item in the sequence
Returns: the required SequenceIterator, positioned at the start of the sequence
Parameters: iter a Sequence iterator that will be consumed to deliver the items in the sequence
Returns: a ValueRepresentation 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.
Returns: an AxisIterator that processes the items in reverse order
Returns: a Value 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 AtomicValue or a SingletonItem. In all other cases, the SequenceExtent will be returned unchanged.
Parameters: start the index of the first item to be included in the result, counting from zero. A negative value is taken as zero. If the value is beyond the end of the sequence, an empty sequence is returned length the number of items to be included in the result. Specify Integer.MAX_VALUE to get the subsequence up to the end of the base sequence. If the value is negative, an empty sequence is returned. If the value goes off the end of the sequence, the result returns items up to the end of the sequence
Returns: the required subsequence. If min is
Parameters: a the position of the first item to be swapped b the position of the second item to be swapped