Package com.icl.saxon.functions
Class Round
java.lang.Object
com.icl.saxon.expr.Expression
com.icl.saxon.expr.Function
com.icl.saxon.functions.Round
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Field Summary
Fields inherited from class com.icl.saxon.expr.Expression
staticContext
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionEvaluate in a general contextdouble
Evaluate the function in a numeric contextint
Determine the data type of the expressionint
Determine the dependenciesgetName()
Function name (for diagnostics)Reduce the dependenciesstatic double
round
(double arg0) Here is the actual rounding algorithmsimplify()
Simplify and validate.Methods inherited from class com.icl.saxon.expr.Function
addArgument, checkArgumentCount, display, getNumberOfArguments
Methods inherited from class com.icl.saxon.expr.Expression
containsReferences, enumerate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsString, getStaticContext, indent, isContextDocumentNodeSet, make, outputStringValue, setStaticContext, usesCurrent
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Constructor Details
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Round
public Round()
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Method Details
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getName
Function name (for diagnostics) -
getDataType
public int getDataType()Determine the data type of the expression- Specified by:
getDataType
in classExpression
- Returns:
- Value.NUMBER
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simplify
Simplify and validate. This is a pure function so it can be simplified in advance if the arguments are known- Overrides:
simplify
in classExpression
- Returns:
- the simplified expression
- Throws:
XPathException
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evaluateAsNumber
Evaluate the function in a numeric context- Overrides:
evaluateAsNumber
in classExpression
- Parameters:
c
- The context in which the expression is to be evaluated- Returns:
- the value of the expression, evaluated in the current context
- Throws:
XPathException
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evaluate
Evaluate in a general context- Specified by:
evaluate
in classExpression
- Parameters:
c
- The context in which the expression is to be evaluated- Returns:
- the value of the expression, evaluated in the current context
- Throws:
XPathException
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getDependencies
public int getDependencies()Determine the dependencies- Specified by:
getDependencies
in classExpression
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reduce
Reduce the dependencies- Specified by:
reduce
in classExpression
- Parameters:
dep
- The dependencies to be removed, e.g. Context.VARIABLESc
- 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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round
public static double round(double arg0) Here is the actual rounding algorithm
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