org.expressionj.expr

Class ExprSUB

java.lang.Object

org.expressionj.model.AbstractExpression

org.expressionj.expr.AbstractAryExpression

org.expressionj.expr.AbstractAryNumericExpression

org.expressionj.expr.ExprSUB

All Implemented Interfaces:

java.lang.Cloneable, AryExpression, Expression, ExpressionType

public class ExprSUB
extends AbstractAryNumericExpression

Represent a "Subtract" expression.

Field Summary

Fields inherited from class org.expressionj.expr.AbstractAryNumericExpression

type

Fields inherited from class org.expressionj.expr.AbstractAryExpression

expr1, expr2

Fields inherited from class org.expressionj.model.AbstractExpression

block, root

Fields inherited from interface org.expressionj.model.ExpressionType

STRUCT_ARRAY, STRUCT_SCALAR, STRUCT_STRUCTURE, TYPE_BOOL, TYPE_DYNAMIC, TYPE_FLOAT, TYPE_INTEGER, TYPE_NUMERIC, TYPE_STRING, TYPE_UNDEF

Constructor Summary

Constructors

Constructor and Description
ExprSUB(Expression root)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
java.lang.Object	eval() Evaluate the expression.
float	evalAsFloat() Evaluate the expression as a float.
int	evalAsInt() Evaluate the expression as an int.
java.lang.String	getExpressionName() Return the expression name.

Methods inherited from class org.expressionj.expr.AbstractAryNumericExpression

getResultStructure, getResultType

Methods inherited from class org.expressionj.expr.AbstractAryExpression

getExpression1, getExpression2, getVariables, setExpression1, setExpression2

Methods inherited from class org.expressionj.model.AbstractExpression

evalAsBoolean, getParentBlock, getRoot, setParentBlock, setRoot

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.expressionj.model.Expression

evalAsBoolean, getExpression, getLocalVariable, getLocalVariables, getParentBlock, getRoot, getVariable, getVariable, getVariables, hasVariable, hasVariable, removeVariable, setParentBlock

Constructor Detail

ExprSUB

public ExprSUB(Expression root)

Method Detail

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Specified by:

clone in interface Expression

Specified by:

clone in class AbstractExpression

Throws:

java.lang.CloneNotSupportedException

getExpressionName

public java.lang.String getExpressionName()

Description copied from interface: Expression

Return the expression name.

Returns:

the expression name

evalAsInt

public final int evalAsInt()

Description copied from interface: Expression

Evaluate the expression as an int. The result of the evaluation will be the same as Expression.eval(), but the evaluation engine will be able to optimize the computation by knwoing that the result is an int (primitive valeus are cached internally).

Specified by:

evalAsInt in interface Expression

Overrides:

evalAsInt in class AbstractExpression

Returns:

the result as an int

evalAsFloat

public final float evalAsFloat()

Description copied from interface: Expression

Evaluate the expression as a float. The result of the evaluation will be the same as Expression.eval(), but the evaluation engine will be able to optimize the computation by knwoing that the result is a float (primitive valeus are cached internally).

Specified by:

evalAsFloat in interface Expression

Overrides:

evalAsFloat in class AbstractExpression

Returns:

the result as a float

eval

public java.lang.Object eval()
                      throws java.lang.ArithmeticException

Description copied from interface: Expression

Evaluate the expression.

Returns:

the result

Throws:

java.lang.ArithmeticException