com.icl.saxon.expr

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 Summary
	ArithmeticExpression()
	ArithmeticExpression(Expression p1, int operator, Expression p2)

Method Summary
Value	evaluate(Context c) Evaluate an expression.
double	evaluateAsNumber(Context c) Evaluate an expression as a Number.
int	getDataType() Determine the data type of the expression, if possible
Expression	reduce(int dependencies, Context context) Perform a partial evaluation of the expression, by eliminating specified dependencies on the context.

Constructor Detail

public ArithmeticExpression()

public ArithmeticExpression(Expression p1, int operator, Expression p2)

public Value evaluate(Context c)

Evaluate an expression.

Parameters: 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

public double evaluateAsNumber(Context c)

Evaluate an expression as a Number.

Parameters: 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

public int getDataType()

Determine the data type of the expression, if possible

Returns: Value.NUMBER

public Expression reduce(int dependencies, Context context)

Perform a partial evaluation of the expression, by eliminating specified dependencies on the context.

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