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

Class EqualExpression<T,R>

java.lang.Object

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

org.apache.qpid.server.query.engine.parsing.expression.comparison.AbstractComparisonExpression<T,Boolean>

org.apache.qpid.server.query.engine.parsing.expression.comparison.EqualExpression<T,R>

Type Parameters:

T - Input parameter type

R - Output parameter type

All Implemented Interfaces:

Function<T,Boolean>, Predicate<T>, Expression<T,Boolean>, ExpressionNode<T,Boolean>

public class EqualExpression<T,R>
extends AbstractComparisonExpression<T,Boolean>

Comparison equality operation. Evaluates left expression against right expression.

Field Summary

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

_operator

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

_metadata

Constructor Summary

Constructors

Constructor	Description
EqualExpression(ExpressionNode<T,R> left, ExpressionNode<T,R> right)	Constructor initializes children expression list

Method Summary

Modifier and Type	Method	Description
Boolean	apply(T value)	Performs equality comparison using parameters and the value supplied

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

getAlias, test

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

containsAggregation, ctx, evaluateChild, getAggregations, 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

EqualExpression

public EqualExpression(ExpressionNode<T,R> left,
                       ExpressionNode<T,R> right)

Constructor initializes children expression list

Parameters:

left - Left child expression

right - Right child expression

Method Detail

apply

public Boolean apply(T value)

Performs equality comparison using parameters and the value supplied

Parameters:

value - Object to handle

Returns:

Boolean result of value evaluation