org.apache.xpath.operations
Class Plus

java.lang.Object
  org.apache.xpath.Expression
      org.apache.xpath.operations.Operation
          org.apache.xpath.operations.Plus

All Implemented Interfaces:

ExpressionNode, ExpressionOwner, Serializable, javax.xml.transform.SourceLocator, XPathVisitable

public class Plus

extends Operation

The '+' operation expression executer.

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class org.apache.xpath.operations.Operation

Operation.LeftExprOwner

Field Summary

Fields inherited from class org.apache.xpath.operations.Operation

m_left, m_right

Fields inherited from class org.apache.xpath.Expression

Constructor Summary

Plus()

Method Summary

double	num(XPathContext xctxt) Evaluate this operation directly to a double.
XObject	operate(XObject left, XObject right) Apply the operation to two operands, and return the result.

Methods inherited from class org.apache.xpath.operations.Operation

callVisitors, canTraverseOutsideSubtree, deepEquals, execute, fixupVariables, getExpression, getLeftOperand, getRightOperand, setExpression, setLeftRight

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

Plus

public Plus()

Method Detail

operate

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

Apply the operation to two operands, and return the result.

Overrides:

operate in class Operation

Parameters:

left - non-null reference to the evaluated left operand.

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