org.apache.xpath.operations
Class Number

java.lang.Object
  extended byorg.apache.xpath.Expression
      extended byorg.apache.xpath.operations.UnaryOperation
          extended byorg.apache.xpath.operations.Number
All Implemented Interfaces:
ExpressionNode, ExpressionOwner, Serializable, javax.xml.transform.SourceLocator, XPathVisitable

public class Number
extends UnaryOperation

The 'number()' operation expression executer.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.apache.xpath.operations.UnaryOperation
m_right
 
Fields inherited from class org.apache.xpath.Expression
 
Constructor Summary
Number()
           
 
Method Summary
 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, isSameClass, isStableNumber, warn, xstr
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Number

public Number()
Method Detail

operate

public XObject operate(XObject right)
                throws javax.xml.transform.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:
javax.xml.transform.TransformerException

num

public double num(XPathContext xctxt)
           throws javax.xml.transform.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:
javax.xml.transform.TransformerException