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java.lang.Object | +--com.icl.saxon.expr.Expression | +--com.icl.saxon.expr.Value | +--com.icl.saxon.expr.NodeSetValue | +--com.icl.saxon.expr.EmptyNodeSet
A node-set value no nodes
Fields inherited from class com.icl.saxon.expr.Value |
ANY, BOOLEAN, NODESET, NUMBER, OBJECT, STRING |
Fields inherited from class com.icl.saxon.expr.Expression |
staticContext |
Constructor Summary | |
EmptyNodeSet()
|
Method Summary | |
boolean |
asBoolean()
Evaluate as a boolean. |
java.lang.String |
asString()
Convert to string value |
boolean |
contains(NodeInfo node)
Determine whether a particular node is present in the nodeset. |
NodeEnumeration |
enumerate()
Return an enumeration of this nodeset value. |
boolean |
equals(Value other)
Test whether this nodeset "equals" another Value |
Value |
evaluate(Context context)
Evaluate the Node Set. |
NodeSetValue |
evaluateAsNodeSet(Context context)
Evaluate an expression as a NodeSet. |
int |
getCount()
Count the nodes in the node-set. |
NodeInfo |
getFirst()
Get the first node in the nodeset (in document order) |
NodeInfo[] |
getNodes()
Return the nodes in the node-set as an array. |
boolean |
isEmpty()
Determine whether the node-set is empty. |
boolean |
isSingular()
Determine whether the node-set is singular, that is, whether it has a single member. |
boolean |
isSorted()
Test whether the value is known to be sorted |
boolean |
notEquals(Value other)
Test whether this nodeset "not-equals" another Value |
void |
setSorted(boolean isSorted)
Set a flag to indicate whether the nodes are sorted. |
NodeSetValue |
sort()
Sort the nodes into document order. |
Methods inherited from class com.icl.saxon.expr.NodeSetValue |
asNumber, compare, enumerate, getDataType |
Methods inherited from class com.icl.saxon.expr.Value |
getDependencies, inverse, numericCompare, reduce, simplify, stringToNumber |
Methods inherited from class com.icl.saxon.expr.Expression |
containsReferences, evaluateAsBoolean, evaluateAsNumber, evaluateAsString, getStaticContext, make, outputStringValue, setStaticContext, usesCurrent |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public EmptyNodeSet()
Method Detail |
public Value evaluate(Context context) throws org.xml.sax.SAXException
evaluate
in class NodeSetValue
context
- The context for evaluation (not used)public NodeSetValue evaluateAsNodeSet(Context context) throws org.xml.sax.SAXException
evaluateAsNodeSet
in class NodeSetValue
context
- The context in which the expression is to be evaluatedpublic void setSorted(boolean isSorted)
setSorted
in class NodeSetValue
isSorted
- true if the caller wishes to assert that the nodes are in document order
and do not need to be further sortedpublic boolean isSorted()
isSorted
in class NodeSetValue
public java.lang.String asString() throws org.xml.sax.SAXException
asString
in class NodeSetValue
public boolean asBoolean() throws org.xml.sax.SAXException
asBoolean
in class NodeSetValue
public int getCount() throws org.xml.sax.SAXException
getCount
in class NodeSetValue
public boolean isEmpty() throws org.xml.sax.SAXException
isEmpty
in class NodeSetValue
public boolean isSingular() throws org.xml.sax.SAXException
isSingular
in class NodeSetValue
public boolean contains(NodeInfo node) throws org.xml.sax.SAXException
contains
in class NodeSetValue
public NodeInfo[] getNodes() throws org.xml.sax.SAXException
getNodes
in class NodeSetValue
public NodeSetValue sort()
sort
in class NodeSetValue
public NodeInfo getFirst()
getFirst
in class NodeSetValue
public boolean equals(Value other) throws org.xml.sax.SAXException
equals
in class NodeSetValue
com.icl.saxon.expr.Value
public boolean notEquals(Value other) throws org.xml.sax.SAXException
notEquals
in class NodeSetValue
com.icl.saxon.expr.Value
public NodeEnumeration enumerate() throws org.xml.sax.SAXException
enumerate
in class NodeSetValue
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