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

Class MapObjectAccessor<R>

java.lang.Object

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

org.apache.qpid.server.query.engine.parsing.expression.accessor.MapObjectAccessor<R>

Type Parameters:

R - Output parameter type

All Implemented Interfaces:

Function<Map<String,R>,R>, Expression<Map<String,R>,R>, ExpressionNode<Map<String,R>,R>

public class MapObjectAccessor<R>
extends AbstractExpressionNode<Map<String,R>,R>

Map object accessor retrieves value from a map

Field Summary

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

_metadata

Constructor Summary

Constructors

Constructor	Description
MapObjectAccessor(String property)	Constructor object property name

Method Summary

Modifier and Type	Method	Description
R	apply(Map<String,R> map)	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

MapObjectAccessor

public MapObjectAccessor(String property)

Constructor object property name

Parameters:

property - Object property name

Method Detail

apply

public R apply(Map<String,R> map)

Evaluates expression using parameters and the value supplied

Parameters:

map - Map to handle

Returns:

Evaluation result