org.expressionj.expr

Class ExprAffectation

java.lang.Object

org.expressionj.model.AbstractExpression

org.expressionj.expr.AbstractUnaryExpression

org.expressionj.expr.AbstractAssignment

org.expressionj.expr.AbstractScalarAssignment

org.expressionj.expr.ExprAffectation

All Implemented Interfaces:

java.lang.Cloneable, Expression, ExpressionType, UnaryExpression

public class ExprAffectation
extends AbstractScalarAssignment

An affectation expression. The affectation may be of one of the following formats:

• <variable> = <expression>: the variable will be a global variable visible by all expressions
• <type> <variable> = <expression>: the variable will be an internal variable visible only by this expression. Note that if an internal variable has the same name as a global, it will shadow the global one only in this expression

Available types are:

• int
• float
• boolean
• string
• int[]
• float[]
• boolean[]
• string[]
• var: variable has a ExpressionType.TYPE_DYNAMIC type
;

Example

The following expression c=a+b will return the evaluation of "a+b", and will set the value of the variable c with the result.

Field Summary

Fields inherited from class org.expressionj.expr.AbstractScalarAssignment

resultValue

Fields inherited from class org.expressionj.expr.AbstractAssignment

isLocal

Fields inherited from class org.expressionj.expr.AbstractUnaryExpression

expr

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
ExprAffectation(Expression root)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
java.lang.Object	eval() Evaluate the expression.
boolean	evalAsBoolean() Evaluate the expression as a boolean.
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.AbstractScalarAssignment

getExpression, getResult, getResultStructure, getResultType, getVariable, setExpression, setResult, setResult

Methods inherited from class org.expressionj.expr.AbstractAssignment

addLocalVariable, addLocalVariable, addVariable, addVariable, isCreated, isLocal

Methods inherited from class org.expressionj.expr.AbstractUnaryExpression

getVariables

Methods inherited from class org.expressionj.model.AbstractExpression

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

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

Constructor Detail

ExprAffectation

public ExprAffectation(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

evalAsInt

public 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 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

evalAsBoolean

public boolean evalAsBoolean()

Description copied from interface: Expression

Evaluate the expression as a boolean. 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 boolean (primitive valeus are cached internally).

Specified by:

evalAsBoolean in interface Expression

Overrides:

evalAsBoolean in class AbstractExpression

Returns:

the result as a boolean

eval

public java.lang.Object eval()

Description copied from interface: Expression

Evaluate the expression.

Returns:

the result

getExpressionName

public java.lang.String getExpressionName()

Description copied from interface: Expression

Return the expression name.

Returns:

the expression name