com.icl.saxon.expr
class FilterExpression extends NodeSetExpression
staticContext
Constructor and Description |
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FilterExpression(Expression start,
Expression filter)
Constructor
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Modifier and Type | Method and Description |
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void |
display(int level)
Diagnostic print of expression structure
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NodeEnumeration |
enumerate(Context context,
boolean sort)
Evaluate the filter expression in a given context to return a Node Enumeration
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int |
getDependencies()
Determine which aspects of the context the expression depends on.
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boolean |
isContextDocumentNodeSet()
Determine, in the case of an expression whose data type is Value.NODESET,
whether all the nodes in the node-set are guaranteed to come from the same
document as the context node.
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Expression |
reduce(int dep,
Context context)
Perform a partial evaluation of the expression, by eliminating specified dependencies
on the context.
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Expression |
simplify()
Simplify an expression
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evaluate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsString, getDataType, outputStringValue, selectFirst
containsReferences, evaluateAsNumber, getStaticContext, indent, make, setStaticContext, usesCurrent
public FilterExpression(Expression start, Expression filter)
start
- A node-set expression denoting the absolute or relative set of nodes from which the
navigation path should start.filter
- An expression defining the filter predicatepublic Expression simplify() throws XPathException
simplify
in class Expression
XPathException
public NodeEnumeration enumerate(Context context, boolean sort) throws XPathException
enumerate
in class NodeSetExpression
context
- the evaluation contextsort
- true if the result must be in document orderXPathException
- when the expression does not return a nodeset.public int getDependencies()
getDependencies
in class Expression
public Expression reduce(int dep, Context context) throws XPathException
reduce
in class Expression
dep
- The dependencies to be removedcontext
- The context to be used for the partial evaluationXPathException
public boolean isContextDocumentNodeSet()
isContextDocumentNodeSet
in class Expression
public void display(int level)
display
in class Expression