Interface Expression
- All Superinterfaces:
Serializable
- All Known Implementing Classes:
AccessProjectionExpressionBase
,ArithmaticExpression
,ArrayExpression
,AvedevProjectionExpression
,AvgProjectionExpression
,BetweenExpression
,BitwiseOpExpression
,CaseSwitchExpression
,CaseWhenThenExpression
,CastExpression
,CoalesceExpression
,CompareListExpression
,ConcatExpression
,Conjunction
,ConstantExpression
,CountEverProjectionExpression
,CountProjectionExpression
,CountStarProjectionExpression
,CrontabFrequencyExpression
,CrontabParameterExpression
,CrontabParameterSetExpression
,CrontabRangeExpression
,CurrentEvaluationContextExpression
,CurrentTimestampExpression
,Disjunction
,DotExpression
,ExpressionBase
,ExpressionPlaceholder
,FirstEverProjectionExpression
,FirstProjectionExpression
,GroupingExpression
,GroupingIdExpression
,InExpression
,InstanceOfExpression
,IStreamBuiltinExpression
,Junction
,LambdaExpression
,LastEverProjectionExpression
,LastProjectionExpression
,LikeExpression
,MaxProjectionExpression
,MaxRowExpression
,MedianProjectionExpression
,MinProjectionExpression
,MinRowExpression
,NamedParameterExpression
,NewInstanceOperatorExpression
,NewOperatorExpression
,NotExpression
,OrderedObjectParamExpression
,PlugInProjectionExpression
,PreviousExpression
,PriorExpression
,PropertyExistsExpression
,PropertyValueExpression
,RegExpExpression
,RelationalOpExpression
,SingleRowMethodExpression
,StaticMethodExpression
,StddevProjectionExpression
,StreamWildcardExpression
,SubqueryExistsExpression
,SubqueryExpression
,SubqueryInExpression
,SubqueryQualifiedExpression
,SubstitutionParameterExpression
,SumProjectionExpression
,TableAccessExpression
,TimePeriodExpression
,TypeOfExpression
,WildcardExpression
,WindowProjectionExpression
Interface representing an expression for use in select-clauses, where-clauses, having-clauses, order-by clauses and
streams based on filters and pattern filter expressions.
Expressions are organized into a tree-like structure with nodes representing sub-expressions.
Certain types of nodes have certain requirements towards the number or types of nodes that are expected as sub-expressions to an expression.
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Method Summary
Modifier and TypeMethodDescriptionReturns the list of sub-expressions (child expressions) to the current expression node.Returns precedence.Returns the tree of object name, for use by tools to assign an identifier to an expression.void
setChildren
(List<Expression> children) Sets the list of sub-expressions (child expressions) to the current expression node.void
setTreeObjectName
(String objectName) Sets the tree of object name, for use by tools to assign an identifier to an expression.void
toEPL
(StringWriter writer, ExpressionPrecedenceEnum parentPrecedence) Write expression considering precedence.
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Method Details
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getChildren
List<Expression> getChildren()Returns the list of sub-expressions (child expressions) to the current expression node.- Returns:
- child expressions or empty list if there are no child expressions
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setChildren
Sets the list of sub-expressions (child expressions) to the current expression node.- Parameters:
children
- child expressions or empty list if there are no child expressions
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getTreeObjectName
String getTreeObjectName()Returns the tree of object name, for use by tools to assign an identifier to an expression.- Returns:
- tree object id
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setTreeObjectName
Sets the tree of object name, for use by tools to assign an identifier to an expression.- Parameters:
objectName
- tree object id
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getPrecedence
ExpressionPrecedenceEnum getPrecedence()Returns precedence.- Returns:
- precedence
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toEPL
Write expression considering precedence.- Parameters:
writer
- to useparentPrecedence
- precedence
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