net.christopherschultz.evaluator.function
Class BinaryOperator

java.lang.Object
  net.christopherschultz.evaluator.StandardFunction
      net.christopherschultz.evaluator.function.MathFunction
          net.christopherschultz.evaluator.function.BinaryOperator

All Implemented Interfaces:

Function

Direct Known Subclasses:

BinaryOperator.Add, BinaryOperator.And, BinaryOperator.Divide, BinaryOperator.Equal, BinaryOperator.Greater, BinaryOperator.GreaterEqual, BinaryOperator.Less, BinaryOperator.LessEqual, BinaryOperator.Modulus, BinaryOperator.Multiply, BinaryOperator.Or, BinaryOperator.Subtract

public abstract class BinaryOperator
extends MathFunction

Provdes implementations of standard mathematical, logical, and relational binary operators including the following usual suspects: +, -, *, /, =, !=, >, <, >=, <=, &&, ||

Version:

$Revision: 1.2 $ $Date: 2008-06-20 22:58:48 $

Author:

Chris Schultz

Nested Class Summary

static class	BinaryOperator.Add Implements addition.
static class	BinaryOperator.And Implements logical AND.
static class	BinaryOperator.Divide Implements division.
static class	BinaryOperator.Equal Implements equals.
static class	BinaryOperator.Greater Implements greater-than.
static class	BinaryOperator.GreaterEqual Implements generic greater-than or equal to.
static class	BinaryOperator.IncompatibleArgumentsException
static class	BinaryOperator.Less Implements less than.
static class	BinaryOperator.LessEqual Implements greater-than.
static class	BinaryOperator.Modulus Implements modulus (remainder).
static class	BinaryOperator.Multiply Implements multiplication.
static class	BinaryOperator.NotEqual Implements unequal.
static class	BinaryOperator.Or Implements logical OR.
static class	BinaryOperator.Subtract Implements subtraction.

Nested classes/interfaces inherited from class net.christopherschultz.evaluator.function.MathFunction

MathFunction.abs, MathFunction.acos, MathFunction.asin, MathFunction.atan, MathFunction.ceil, MathFunction.cos, MathFunction.DoubleFunction, MathFunction.exp, MathFunction.floor, MathFunction.heaviside, MathFunction.log, MathFunction.max, MathFunction.min, MathFunction.pow, MathFunction.random, MathFunction.rint, MathFunction.sin, MathFunction.sqrt, MathFunction.tan, MathFunction.toDegrees, MathFunction.toRadians

Field Summary

Fields inherited from class net.christopherschultz.evaluator.function.MathFunction

ALLOW_NULL_COMPARISON, NULL_RETURNS_NULL

Constructor Summary

BinaryOperator()

Method Summary

protected abstract Object	call(EvaluationContext ec, Object lvalue, Object rvalue)
Object	call(EvaluationContext ec, String functionName, Object[] args) Checks for exactly two arguments and calls the subclass's 2-argument call function.

Methods inherited from class net.christopherschultz.evaluator.StandardFunction

call, getExpressionValue, getExpressionValueArray, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

BinaryOperator

public BinaryOperator()

Method Detail

call

public Object call(EvaluationContext ec,
                   String functionName,
                   Object[] args)
            throws EvaluationException

Checks for exactly two arguments and calls the subclass's 2-argument call function.

Specified by:

call in class StandardFunction

Parameters:

ec - The EvaluationContext in which this function is being called.

functionName - The name of the function being invoked.

args - The argument values to pass to this function.

Returns:

The result of the function.

Throws:

EvaluationException - If there is an error during function execution.

call

protected abstract Object call(EvaluationContext ec,
                               Object lvalue,
                               Object rvalue)
                        throws EvaluationException

Throws:

EvaluationException