sirius.tagliatelle.expression

Class BooleanOperation

java.lang.Object

sirius.tagliatelle.expression.BooleanOperation

All Implemented Interfaces:

Expression

Direct Known Subclasses:

AndOperation, OrOperation

public abstract class BooleanOperation
extends Object
implements Expression

Represents a binary operation on boolean types.

Field Summary

Fields

Modifier and Type	Field and Description
protected Expression	leftExpression
protected Expression	rightExpression

Constructor Summary

Constructors

Constructor and Description
BooleanOperation(Expression leftExpression, Expression rightExpression) Creates a new operation for the given operands.

Method Summary

Modifier and Type	Method and Description
protected boolean	eval(Expression expr, LocalRenderContext ctx) Evaluates the operation into a boolean.
Class<?>	getType() Returns the Java class of the objects yielded by this expression.
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

copy, eval, isConstant

Field Detail

leftExpression

protected Expression leftExpression

rightExpression

protected Expression rightExpression

Constructor Detail

BooleanOperation

public BooleanOperation(Expression leftExpression,
                        Expression rightExpression)

Creates a new operation for the given operands.

Parameters:

leftExpression - the left operand which must be a boolean expression

rightExpression - the right operand which must be a boolean expression

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

eval

protected boolean eval(Expression expr,
                       LocalRenderContext ctx)

Evaluates the operation into a boolean.

Parameters:

expr - the expression to evaluate

ctx - the context used for the evaluation

Returns:

the result of the expression casted as boolean

getType

public Class<?> getType()

Description copied from interface: Expression

Returns the Java class of the objects yielded by this expression.

Specified by:

getType in interface Expression

Returns:

the type of objects created by this expression