Package org.apache.xalan.extensions
Class ExpressionVisitor
- java.lang.Object
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- org.apache.xpath.XPathVisitor
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- org.apache.xalan.extensions.ExpressionVisitor
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public class ExpressionVisitor extends XPathVisitor
WhenStylesheetHandler
creates anXPath
, the ExpressionVisitor visits the XPath expression. For any extension functions it encounters, it instructs StylesheetRoot to register the extension namespace. This mechanism is required to locate extension functions that may be embedded within an expression.
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Constructor Summary
Constructors Constructor Description ExpressionVisitor(StylesheetRoot sroot)
The constructor sets the StylesheetRoot variable which is used to register extension namespaces.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
visitFunction(ExpressionOwner owner, Function func)
If the function is an extension function, register the namespace.-
Methods inherited from class org.apache.xpath.XPathVisitor
visitBinaryOperation, visitLocationPath, visitMatchPattern, visitNumberLiteral, visitPredicate, visitStep, visitStringLiteral, visitUnaryOperation, visitUnionPath, visitUnionPattern, visitVariableRef
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Constructor Detail
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ExpressionVisitor
public ExpressionVisitor(StylesheetRoot sroot)
The constructor sets the StylesheetRoot variable which is used to register extension namespaces.- Parameters:
sroot
- the StylesheetRoot that is being constructed.
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Method Detail
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visitFunction
public boolean visitFunction(ExpressionOwner owner, Function func)
If the function is an extension function, register the namespace.- Overrides:
visitFunction
in classXPathVisitor
- Parameters:
owner
- The current XPath object that owns the expression.func
- The function currently being visited.- Returns:
- true to continue the visit in the subtree, if any.
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