com.satline.expr
Class NumberConstant

java.lang.Object
  com.satline.expr.NumberConstant

All Implemented Interfaces:

Constant, Expression, java.io.Serializable

Direct Known Subclasses:

DoubleConstant, IntegerConstant

public abstract class NumberConstant
extends java.lang.Object
implements Constant

Base class for all numeric constant expressions.

Author:

Teubner

See Also:

Serialized Form

Field Summary

protected java.lang.Number

value

Constructor Summary

protected	NumberConstant() Default constructor
protected	NumberConstant(java.lang.Number value) Constructor using value

Method Summary

boolean	equals(java.lang.Object obj) Compares this object against the specified object.
<E,F> E	greet(ExpressionWalker<E,F> visitor, F arg) Handle visit of ExpressionWalker.
int	hashCode()
void	setValue(java.lang.Number value) Set constant value.
java.lang.String	toString() Get string representation.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

value

protected java.lang.Number value

Constructor Detail

NumberConstant

protected NumberConstant()

Default constructor

NumberConstant

protected NumberConstant(java.lang.Number value)

Constructor using value

Parameters:

value - - constant value

Method Detail

setValue

public void setValue(java.lang.Number value)

Set constant value.

Parameters:

value - - constant value.

greet

public <E,F> E greet(ExpressionWalker<E,F> visitor,
                     F arg)
        throws ExpressionException

Handle visit of ExpressionWalker.

Specified by:

greet in interface Expression

Parameters:

visitor - - the ExpressionWalker visiting this object

arg - - implementation dependent argument

Returns:

implementation dependent value

Throws:

ExpressionException

toString

public java.lang.String toString()

Get string representation.

Overrides:

toString in class java.lang.Object

Returns:

string representation

equals

public boolean equals(java.lang.Object obj)

Compares this object against the specified object. The result is true if and only if the argument is not null and is a Field object with equal value as this object.

Overrides:

equals in class java.lang.Object

Parameters:

obj - - object to compare with

Returns:

true if the objects are the same, false otherwise

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object