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java.lang.Object net.sf.saxon.s9api.XdmValue net.sf.saxon.s9api.XdmEmptySequence
public class XdmEmptySequence
The class XdmEmptySequence represents an empty sequence in the XDM Data Model.
This is a singleton class: there is only one instance, which may be obtained
using the getInstance()
method.
An empty sequence may also be represented by an XdmValue
whose length happens to be zero.
Applications should therefore not test to see whether an object is an instance of this class
in order to decide whether it is empty.
Note: in interfaces that expect an XdmItem
, an empty sequence is represented by a
Java null value.
Method Summary | |
---|---|
static XdmEmptySequence |
getInstance()
Return the singleton instance of this class |
int |
size()
Get the number of items in the sequence |
Methods inherited from class net.sf.saxon.s9api.XdmValue |
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append, getUnderlyingValue, itemAt, iterator, setValue, wrap |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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public static XdmEmptySequence getInstance()
public int size()
size
in class XdmValue
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