public class SingletonNode extends Value implements GroundedValue
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protected NodeInfo |
node |
EMPTY_CLASS_ARRAY, INDETERMINATE_ORDERING
EMPTY_VALUE_ARRAY
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SingletonNode(NodeInfo node)
Create a node-set containing zero or one nodes
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Item |
asItem()
Return the value in the form of an Item
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boolean |
effectiveBooleanValue()
Get the effective boolean value
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int |
getCardinality()
Determine the static cardinality
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ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the items in the expression.
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int |
getLength()
Get the length of the sequence
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NodeInfo |
getNode()
Get the node that forms the node-set.
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java.lang.String |
getStringValue()
Convert the value to a string, using the serialization rules.
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Item |
itemAt(int n)
Get the n'th item in the sequence (starting from 0).
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SequenceIterator |
iterate()
Return an enumeration of this nodeset value.
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void |
process(XPathContext context)
Process the instruction, without returning any tail calls
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GroundedValue |
subsequence(int start,
int length)
Get a subsequence of the value
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asItem, asIterator, asValue, checkPermittedContents, convertToJava, equals, fromItem, getCanonicalLexicalRepresentation, getIterator, getSchemaComparable, getStringValueCS, iterate, makeQNameValue, reduce, stringToNumber, toString
getStringValueCS
protected NodeInfo node
public SingletonNode(NodeInfo node)
node
- The node to be contained in the node-set, or null if the node-set
is to be emptypublic Item asItem()
public void process(XPathContext context) throws XPathException
process
??? Value
context
- The dynamic context, giving access to the current node,
the current variables, etc.XPathException
public ItemType getItemType(TypeHierarchy th)
getItemType
??? Value
th
- the type hierarchy cachepublic int getCardinality()
getCardinality
??? Value
public int getLength() throws XPathException
getLength
??? Value
XPathException
public Item itemAt(int n)
itemAt
???? GroundedValue
itemAt
??? Value
n
- position of the required item, counting from zero.public GroundedValue subsequence(int start, int length)
subsequence
???? GroundedValue
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 returnedlength
- 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 sequencepublic NodeInfo getNode()
public SequenceIterator iterate()
public boolean effectiveBooleanValue()
effectiveBooleanValue
??? Value
public java.lang.String getStringValue()
getStringValue
???? ValueRepresentation
getStringValue
??? Value