Number (Xalan-Java 2.7.2)

java.lang.Object

org.apache.xpath.Expression

org.apache.xpath.operations.UnaryOperation

org.apache.xpath.operations.Number

All Implemented Interfaces:: Serializable, SourceLocator, ExpressionNode, ExpressionOwner, XPathVisitable

public class Number extends UnaryOperation

The 'number()' operation expression executer.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor

Description

Number()
Method Summary

Modifier and Type

Method

Description

double

num(XPathContext xctxt)

Evaluate this operation directly to a double.

XObject

operate(XObject right)

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

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- Number
  
  public Number()
Method Details
- operate
  
  public XObject operate(XObject right) throws TransformerException
  
  Apply the operation to two operands, and return the result.
  
  Specified by:
  
  operate in class UnaryOperation
  
  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
- num
  
  public double num(XPathContext xctxt) throws TransformerException
  
  Evaluate this operation directly to a double.
  
  Overrides:
  
  num in class Expression
  
  Parameters:
  
  xctxt - The runtime execution context.
  
  Returns:
  
  The result of the operation as a double.
  
  Throws:
  
  TransformerException