Package com.icl.saxon.expr
Class ArithmeticExpression
java.lang.Object
com.icl.saxon.expr.Expression
com.icl.saxon.expr.BinaryExpression
com.icl.saxon.expr.ArithmeticExpression
Arithmetic Expression: a numeric expression consisting of the sum, difference,
product, quotient, or modulus of two numeric expressions
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Field Summary
Fields inherited from class com.icl.saxon.expr.BinaryExpression
operator, p1, p2
Fields inherited from class com.icl.saxon.expr.Expression
staticContext
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionEvaluate an expression.double
Evaluate an expression as a Number.int
Determine the data type of the expression, if possiblePerform a partial evaluation of the expression, by eliminating specified dependencies on the context.Methods inherited from class com.icl.saxon.expr.BinaryExpression
display, getDependencies, setDetails, simplify
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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ArithmeticExpression
public ArithmeticExpression() -
ArithmeticExpression
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Method Details
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evaluate
Evaluate an expression.- Specified by:
evaluate
in classExpression
- Parameters:
c
- The context in which the expression is to be evaluatedcontext
- The context in which the expression is to be evaluated- Returns:
- the value of the expression as a Value object, evaluated in the current context
- Throws:
XPathException
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evaluateAsNumber
Evaluate an expression as a Number.- Overrides:
evaluateAsNumber
in classExpression
- Parameters:
c
- The context in which the expression is to be evaluatedcontext
- The context in which the expression is to be evaluated- Returns:
- the value of the expression as a double, evaluated in the current context
- Throws:
XPathException
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getDataType
public int getDataType()Determine the data type of the expression, if possible- Specified by:
getDataType
in classExpression
- Returns:
- Value.NUMBER
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reduce
Perform a partial evaluation of the expression, by eliminating specified dependencies on the context.- Specified by:
reduce
in classExpression
- Parameters:
dependencies
- The dependencies to be removedcontext
- The context to be used for the partial evaluation- Returns:
- a new expression that does not have any of the specified dependencies
- Throws:
XPathException
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