Package com.icl.saxon.expr
Class StyleSheetFunctionCall
- java.lang.Object
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- com.icl.saxon.expr.Expression
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- com.icl.saxon.expr.Function
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- com.icl.saxon.expr.StyleSheetFunctionCall
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public class StyleSheetFunctionCall extends Function
This class represents a call to a function defined in the stylesheet
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Field Summary
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Fields inherited from class com.icl.saxon.expr.Expression
staticContext
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Constructor Summary
Constructors Constructor Description StyleSheetFunctionCall()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Value
evaluate(Context c)
Evaluate the functionint
getDataType()
Determine the data type of the expression, if possibleint
getDependencies()
Determine which aspects of the context the expression depends on.java.lang.String
getName()
Get the name of the function.Expression
reduce(int dependencies, Context context)
Remove dependencies.void
setFunction(SAXONFunction f)
Create the reference to the saxon:function elementExpression
simplify()
Simplify the function call-
Methods inherited from class com.icl.saxon.expr.Function
addArgument, checkArgumentCount, display, getNumberOfArguments
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Methods inherited from class com.icl.saxon.expr.Expression
containsReferences, enumerate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsNumber, evaluateAsString, getStaticContext, indent, isContextDocumentNodeSet, make, outputStringValue, setStaticContext, usesCurrent
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Method Detail
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setFunction
public void setFunction(SAXONFunction f)
Create the reference to the saxon:function element
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getName
public java.lang.String getName()
Get the name of the function.
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getDataType
public int getDataType()
Determine the data type of the expression, if possible- Specified by:
getDataType
in classExpression
- Returns:
- Value.ANY (meaning not known in advance)
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simplify
public Expression simplify() throws XPathException
Simplify the function call- Overrides:
simplify
in classExpression
- Returns:
- the simplified expression
- Throws:
XPathException
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getDependencies
public int getDependencies()
Determine which aspects of the context the expression depends on. The result is a bitwise-or'ed value composed from constants such as Context.VARIABLES and Context.CURRENT_NODE- Specified by:
getDependencies
in classExpression
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reduce
public Expression reduce(int dependencies, Context context) throws XPathException
Remove dependencies.- Specified by:
reduce
in classExpression
- Parameters:
dependencies
- The dependencies to be removed, e.g. Context.VARIABLEScontext
- The context to be used for the partial evaluation- Returns:
- a new expression (or Value) that does not have any of the specified dependencies
- Throws:
XPathException
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evaluate
public Value evaluate(Context c) throws XPathException
Evaluate the function- Specified by:
evaluate
in classExpression
- Parameters:
context
- The context in which the function is to be evaluated- Returns:
- a Value representing the result of the function. This must be of the data type corresponding to the result of getType().
- Throws:
XPathException
- if the function cannot be evaluated.
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