Package org.apache.xpath.operations
Class Neg
java.lang.Object
org.apache.xpath.Expression
org.apache.xpath.operations.UnaryOperation
org.apache.xpath.operations.Neg
- All Implemented Interfaces:
Serializable
,SourceLocator
,ExpressionNode
,ExpressionOwner
,XPathVisitable
The unary '-' operation expression executer.
- See Also:
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiondouble
num
(XPathContext xctxt) Evaluate this operation directly to a double.Apply the operation to two operands, and return the result.Methods inherited from class org.apache.xpath.operations.UnaryOperation
callVisitors, canTraverseOutsideSubtree, deepEquals, execute, fixupVariables, getExpression, getOperand, setExpression, setRight
Methods inherited from class org.apache.xpath.Expression
asIterator, asIteratorRaw, asNode, assertion, bool, error, execute, execute, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isStableNumber, warn, xstr
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Constructor Details
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Neg
public Neg()
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Method Details
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operate
Apply the operation to two operands, and return the result.- Specified by:
operate
in classUnaryOperation
- Parameters:
right
- non-null reference to the evaluated right operand.- Returns:
- non-null reference to the XObject that represents the result of the operation.
- Throws:
TransformerException
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num
Evaluate this operation directly to a double.- Overrides:
num
in classExpression
- Parameters:
xctxt
- The runtime execution context.- Returns:
- The result of the operation as a double.
- Throws:
TransformerException
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