sirius.tagliatelle.expression

Class ConstantExpression

java.lang.Object

sirius.tagliatelle.expression.ConstantExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

ConstantBoolean, ConstantClass, ConstantEnum, ConstantInt, ConstantNull, ConstantString

public abstract class ConstantExpression
extends Object
implements Expression

Represents a constant expression.

Constructor Summary

Constructors

Constructor and Description
ConstantExpression()

Method Summary

Modifier and Type	Method and Description
Expression	copy() Creates a deep copy of the expression which can be modified without affecting the original expression.
boolean	isConstant() Determines if the expression is constant.
Expression	propagateVisitor(ExpressionVisitor visitor) Visits all child nodes and then the node itself.
Expression	reduce() Reduces and optimizes the expression if possible.

Methods inherited from class java.lang.Object

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

Methods inherited from interface sirius.tagliatelle.expression.Expression

eval, getType

Constructor Detail

ConstantExpression

public ConstantExpression()

Method Detail

propagateVisitor

public Expression propagateVisitor(ExpressionVisitor visitor)

Description copied from interface: Expression

Visits all child nodes and then the node itself.

Specified by:

propagateVisitor in interface Expression

Parameters:

visitor - the visitor to invoke for all child nodes and on the node itself

Returns:

the result of the invocation of the given visitor on this node

reduce

public Expression reduce()

Description copied from interface: Expression

Reduces and optimizes the expression if possible.

Specified by:

reduce in interface Expression

Returns:

either the node itself or an optimized / reduced version if possible

isConstant

public boolean isConstant()

Description copied from interface: Expression

Determines if the expression is constant.

Specified by:

isConstant in interface Expression

Returns:

true if the expression is constant, false otherwise

copy

public Expression copy()

Description copied from interface: Expression

Creates a deep copy of the expression which can be modified without affecting the original expression.

Specified by:

copy in interface Expression

Returns:

a deep copy of the expression