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

Interface ExpressionNode<T,R>

Type Parameters:

T - Input parameter type

R - Return parameter type

All Superinterfaces:

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

All Known Subinterfaces:

SetExpression<T,R>

All Known Implementing Classes:

AbsExpression, AbstractAggregationExpression, AbstractArithmeticExpression, AbstractComparisonExpression, AbstractExpressionNode, AbstractFunctionExpression, AbstractSetExpression, AndExpression, AvgExpression, BetweenExpression, CaseExpression, ChainedObjectAccessor, CoalesceExpression, CollectionObjectAccessor, ConcatExpression, ConfiguredObjectAccessorExpression, ConstantExpression, CountExpression, CurrentTimestampExpression, DateAddExpression, DateDiffExpression, DateExpression, DelegatingCollectionAccessorExpression, DelegatingObjectAccessor, DivideExpression, EmptySetExpression, EqualExpression, ExpressionWrapperExpression, ExtractExpression, FalseLiteralExpression, FromExpression, GreaterThanExpression, GreaterThanOrEqualExpression, HavingExpression, InExpression, IntersectExpression, IsNullExpression, LeftTrimExpression, LengthExpression, LessThanExpression, LessThanOrEqualExpression, LikeExpression, LowerExpression, MapObjectAccessor, MaxExpression, MinExpression, MinusExpression, MinusExpression, ModExpression, MultiplyExpression, NotExpression, NullLiteralExpression, NumberLiteralExpression, ObjectAccessorExpression, OrExpression, PlusExpression, PositionExpression, PredicateWrapperExpression, ProjectionExpression, QueryExpression, ReplaceExpression, RightTrimExpression, RoundExpression, SelectExpression, StringLiteralExpression, SubstringExpression, SumExpression, TrimExpression, TrueLiteralExpression, TruncExpression, UnionExpression, UpperExpression

public interface ExpressionNode<T,R>
extends Expression<T,R>

Node of which expression tree consist of

Method Summary

Modifier and Type	Method	Description
boolean	containsAggregation()	Determines whether expression contains aggregation nodes or not
<Y> List<AbstractAggregationExpression<T,Y>>	getAggregations()	Returns expression children being aggregation nodes
String	getAlias()	Returns expression alias
<Y> List<ExpressionNode<T,Y>>	getChildren()	Returns expression children
<Y> ExpressionNode<T,Y>	getParent()	Return expression parent
boolean	isAccessor()	Determines whether expression is an accessor or not
boolean	isInstantlyEvaluable()	Determines whether expression can be evaluated instantly or not
void	setAlias(String alias)	Setter for alias
void	setParent(ExpressionNode<T,?> parent)	Setter for parent

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

andThen, apply

Methods inherited from interface java.util.function.Function

andThen, compose

Method Detail

containsAggregation

boolean containsAggregation()

Determines whether expression contains aggregation nodes or not

Returns:

True or false

isAccessor

boolean isAccessor()

Determines whether expression is an accessor or not

Returns:

True or false

isInstantlyEvaluable

boolean isInstantlyEvaluable()

Determines whether expression can be evaluated instantly or not

Returns:

True or false

getAlias

String getAlias()

Returns expression alias

Returns:

Expression alias

setAlias

void setAlias(String alias)

Setter for alias

Parameters:

alias - Expression alias

getParent

<Y> ExpressionNode<T,Y> getParent()

Return expression parent

Returns:

Expression parent

setParent

void setParent(ExpressionNode<T,?> parent)

Setter for parent

Parameters:

parent - Expression parent

getChildren

<Y> List<ExpressionNode<T,Y>> getChildren()

Returns expression children

Returns:

List of child expressions

getAggregations

<Y> List<AbstractAggregationExpression<T,Y>> getAggregations()

Returns expression children being aggregation nodes

Type Parameters:

Y - Return type

Returns:

List of aggregation expressions