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

Class ObjectAccessorExpression<T,R>

java.lang.Object

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

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

Type Parameters:

R - Return parameter type

All Implemented Interfaces:

Function<T,R>, Expression<T,R>, ExpressionNode<T,R>

public class ObjectAccessorExpression<T,R>
extends AbstractExpressionNode<T,R>

Object accessor retrieves values from an object

Field Summary

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

_metadata

Constructor Summary

Constructors

Constructor	Description
ObjectAccessorExpression(String property)	Constructor stores field values

Method Summary

Modifier and Type	Method	Description
R	apply(T value)	Evaluates 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

Constructor Detail

ObjectAccessorExpression

public ObjectAccessorExpression(String property)

Constructor stores field values

Parameters:

property - Property name

Method Detail

apply

public R apply(T value)

Evaluates expression using parameters and the value supplied

Parameters:

value - Object to handle

Returns:

Evaluation result