Package org.apache.qpid.server.query.engine.parsing.factory

Class LogicExpressionFactory

java.lang.Object

org.apache.qpid.server.query.engine.parsing.factory.LogicExpressionFactory

public final class LogicExpressionFactory
extends Object

Factory creating logic expressions

Method Summary

Modifier and Type	Method	Description
static <T,R> AndExpression<T>	and(String alias, ExpressionNode<T,R> left, ExpressionNode<T,R> right)	Creates an AndExpression instance
static <T,R> NotExpression<T,R>	negate(Expression<T,R> value)	Creates a NotExpression from a source expression
static <T,R> OrExpression<T>	or(String alias, ExpressionNode<T,R> left, ExpressionNode<T,R> right)	Creates an OrExpression instance
static <T> Expression<T,Boolean>	toFunction(Predicate<T> predicate)	Wraps predicate into an expression
static <T,R> Predicate<T>	toPredicate(ExpressionNode<T,R> expression)	Wraps expression into a predicate

Methods inherited from class java.lang.Object

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

Method Detail

and

public static <T,R> AndExpression<T> and(String alias,
                                               ExpressionNode<T,R> left,
                                               ExpressionNode<T,R> right)

Creates an AndExpression instance

Type Parameters:

T - Input parameter type

R - Return parameter type

Parameters:

alias - Expression alias

left - Left expression

right - Right expression

Returns:

AndExpression instance

or

public static <T,R> OrExpression<T> or(String alias,
                                             ExpressionNode<T,R> left,
                                             ExpressionNode<T,R> right)

Creates an OrExpression instance

Type Parameters:

T - Input parameter type

R - Return parameter type

Parameters:

alias - Expression alias

left - Left expression

right - Right expression

Returns:

OrExpression instance

toPredicate

public static <T,R> Predicate<T> toPredicate(ExpressionNode<T,R> expression)

Wraps expression into a predicate

Type Parameters:

T - Input parameter type

R - Return parameter type

Parameters:

expression - Source expression

Returns:

Predicate

toFunction

public static <T> Expression<T,Boolean> toFunction(Predicate<T> predicate)

Wraps predicate into an expression

Type Parameters:

T - Input parameter type

Parameters:

predicate - Predicate instance

Returns:

Expression instance

negate

public static <T,R> NotExpression<T,R> negate(Expression<T,R> value)

Creates a NotExpression from a source expression

Type Parameters:

T - Input parameter type

R - Return parameter type

Parameters:

value - Source expression

Returns:

NotExpression instance