Package org.apache.qpid.server.query.engine.parsing.expression.logic

Class PredicateWrapperExpression<T,R>

java.lang.Object

org.apache.qpid.server.query.engine.parsing.expression.AbstractExpressionNode<T,java.lang.Boolean>

org.apache.qpid.server.query.engine.parsing.expression.logic.PredicateWrapperExpression<T,R>

Type Parameters:

T - Input parameter type

All Implemented Interfaces:

java.util.function.Function<T,java.lang.Boolean>, java.util.function.Predicate<T>, Expression<T,java.lang.Boolean>, ExpressionNode<T,java.lang.Boolean>

public class PredicateWrapperExpression<T,R>
extends AbstractExpressionNode<T,java.lang.Boolean>
implements java.util.function.Predicate<T>

Wraps an expression into a predicate.

Field Summary

Fields inherited from class org.apache.qpid.server.query.engine.parsing.expression.AbstractExpressionNode

_metadata

Constructor Summary

Constructors

Constructor	Description
PredicateWrapperExpression(ExpressionNode<T,R> expression)	Constructor stores the expression value

Method Summary

Modifier and Type	Method	Description
java.lang.Boolean	apply(T value)	Calls stored expression using parameters and the value supplied
boolean	test(T value)	Calls stored expression using parameters and the value supplied

Methods inherited from class org.apache.qpid.server.query.engine.parsing.expression.AbstractExpressionNode

containsAggregation, ctx, evaluateChild, getAggregations, getAlias, getChild, getChildren, getParent, isAccessor, isInstantlyEvaluable, setAlias, setParent, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.qpid.server.query.engine.parsing.expression.Expression

andThen

Methods inherited from interface java.util.function.Function

andThen, compose

Methods inherited from interface java.util.function.Predicate

and, negate, or

Constructor Detail

PredicateWrapperExpression

public PredicateWrapperExpression(ExpressionNode<T,R> expression)

Constructor stores the expression value

Parameters:

expression - Expression to evaluate

Method Detail

test

public boolean test(T value)

Calls stored expression using parameters and the value supplied

Specified by:

test in interface java.util.function.Predicate<T>

Parameters:

value - Object to handle

Returns:

Evaluation result

apply

public java.lang.Boolean apply(T value)

Calls stored expression using parameters and the value supplied

Specified by:

apply in interface Expression<T,R>

Specified by:

apply in interface java.util.function.Function<T,R>

Parameters:

value - Object to handle

Returns:

Evaluation result