Class ArithmeticExpression


class ArithmeticExpression extends BinaryExpression
Arithmetic Expression: a numeric expression consisting of the sum, difference, product, quotient, or modulus of two numeric expressions
  • Constructor Details

    • ArithmeticExpression

      public ArithmeticExpression()
    • ArithmeticExpression

      public ArithmeticExpression(Expression p1, int operator, Expression p2)
  • Method Details

    • evaluate

      public Value evaluate(Context c) throws XPathException
      Evaluate an expression.
      Specified by:
      evaluate in class Expression
      Parameters:
      c - The context in which the expression is to be evaluated
      context - 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
    • evaluateAsNumber

      public double evaluateAsNumber(Context c) throws XPathException
      Evaluate an expression as a Number.
      Overrides:
      evaluateAsNumber in class Expression
      Parameters:
      c - The context in which the expression is to be evaluated
      context - 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
    • getDataType

      public int getDataType()
      Determine the data type of the expression, if possible
      Specified by:
      getDataType in class Expression
      Returns:
      Value.NUMBER
    • reduce

      public Expression reduce(int dependencies, Context context) throws XPathException
      Perform a partial evaluation of the expression, by eliminating specified dependencies on the context.
      Specified by:
      reduce in class Expression
      Parameters:
      dependencies - The dependencies to be removed
      context - The context to be used for the partial evaluation
      Returns:
      a new expression that does not have any of the specified dependencies
      Throws:
      XPathException