com.espertech.esper.epl.expression.core

Class ExprNodeBase

java.lang.Object

com.espertech.esper.epl.expression.core.ExprNodeBase

All Implemented Interfaces:

ExprNode, ExprNodeRenderable, ExprValidator, MetaDefItem, Serializable

Direct Known Subclasses:

ExprAggregateNodeBase, ExprAggregateNodeGroupKey, ExprAndNodeImpl, ExprAppDotMethodImpl, ExprArrayNode, ExprBetweenNodeImpl, ExprBitWiseNode, ExprCaseNode, ExprCastNode, ExprCoalesceNode, ExprConcatNode, ExprConstantNodeImpl, ExprContextPropertyNodeImpl, ExprCurrentEvaluationContextNode, ExprDeclaredNodeImpl, ExprDotNodeImpl, ExprEqualsAllAnyNode, ExprEqualsNodeImpl, ExprGroupingIdNode, ExprGroupingNode, ExprIdentNodeImpl, ExprInNodeImpl, ExprInstanceofNode, ExprIStreamNode, ExprLambdaGoesNode, ExprLikeNode, ExprMathNode, ExprMinMaxRowNode, ExprNamedParameterNodeImpl, ExprNewInstanceNode, ExprNewStructNode, ExprNodeScript, ExprNodeValidated, ExprNotNode, ExprNumberSetCronParam, ExprNumberSetFrequency, ExprNumberSetList, ExprNumberSetRange, ExprOrderedExpr, ExprOrNode, ExprPlugInSingleRowNode, ExprPreviousMatchRecognizeNode, ExprPreviousNode, ExprPriorNode, ExprPropertyExistsNode, ExprRegexpNode, ExprRelationalOpAllAnyNode, ExprRelationalOpNodeImpl, ExprStreamUnderlyingNodeImpl, ExprSubselectNode, ExprSubstitutionNode, ExprTableAccessNode, ExprTableIdentNode, ExprTableIdentNodeSubpropAccessor, ExprTimePeriodImpl, ExprTimestampNode, ExprTypedNoEvalNode, ExprTypeofNode, ExprVariableNodeImpl, ExprWildcardImpl

public abstract class ExprNodeBase
extends Object
implements ExprNode

Superclass for filter nodes in a filter expression tree. Allow validation against stream event types and evaluation of events against filter tree.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExprNodeBase() Constructor creates a list of child nodes.

Method Summary

Modifier and Type	Method and Description
void	accept(ExprNodeVisitor visitor) Accept the visitor.
void	accept(ExprNodeVisitorWithParent visitor) Accept the visitor.
void	acceptChildnodes(ExprNodeVisitorWithParent visitor, ExprNode parent) Accept a visitor that receives both parent and child node.
void	addChildNode(ExprNode childNode) Adds a child node.
void	addChildNodes(Collection<ExprNode> childNodeColl) Adds child nodes.
void	addChildNodeToFront(ExprNode childNode)
ExprNode[]	getChildNodes() Returns list of child nodes.
void	replaceUnlistedChildNode(ExprNode nodeToReplace, ExprNode newNode)
void	setChildNode(int index, ExprNode newNode)
void	setChildNodes(ExprNode... nodes)
void	toEPL(StringWriter writer, ExprPrecedenceEnum parentPrecedence)
abstract void	toPrecedenceFreeEPL(StringWriter writer)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.espertech.esper.epl.expression.core.ExprNode

equalsNode, getForge, getPrecedence, isConstantResult

Methods inherited from interface com.espertech.esper.epl.expression.core.ExprValidator

validate

Constructor Detail

ExprNodeBase

public ExprNodeBase()

Constructor creates a list of child nodes.

Method Detail

toPrecedenceFreeEPL

public abstract void toPrecedenceFreeEPL(StringWriter writer)

accept

public void accept(ExprNodeVisitor visitor)

Description copied from interface: ExprNode

Accept the visitor. The visitor will first visit the parent then visit all child nodes, then their child nodes.

The visitor can decide to skip child nodes by returning false in isVisit.

Specified by:

accept in interface ExprNode

Parameters:

visitor - to visit each node and each child node.

accept

public void accept(ExprNodeVisitorWithParent visitor)

Description copied from interface: ExprNode

Accept the visitor. The visitor will first visit the parent then visit all child nodes, then their child nodes.

The visitor can decide to skip child nodes by returning false in isVisit.

Specified by:

accept in interface ExprNode

Parameters:

visitor - to visit each node and each child node.

acceptChildnodes

public void acceptChildnodes(ExprNodeVisitorWithParent visitor,
                             ExprNode parent)

Description copied from interface: ExprNode

Accept a visitor that receives both parent and child node.

Specified by:

acceptChildnodes in interface ExprNode

Parameters:

visitor - to apply

parent - node

addChildNode

public final void addChildNode(ExprNode childNode)

Description copied from interface: ExprNode

Adds a child node.

Specified by:

addChildNode in interface ExprNode

Parameters:

childNode - is the child evaluation tree node to add

addChildNodes

public final void addChildNodes(Collection<ExprNode> childNodeColl)

Description copied from interface: ExprNode

Adds child nodes.

Specified by:

addChildNodes in interface ExprNode

Parameters:

childNodeColl - are the child evaluation tree node to add

getChildNodes

public final ExprNode[] getChildNodes()

Description copied from interface: ExprNode

Returns list of child nodes.

Specified by:

getChildNodes in interface ExprNode

Returns:

list of child nodes

replaceUnlistedChildNode

public void replaceUnlistedChildNode(ExprNode nodeToReplace,
                                     ExprNode newNode)

Specified by:

replaceUnlistedChildNode in interface ExprNode

addChildNodeToFront

public void addChildNodeToFront(ExprNode childNode)

setChildNodes

public void setChildNodes(ExprNode... nodes)

Specified by:

setChildNodes in interface ExprNode

setChildNode

public void setChildNode(int index,
                         ExprNode newNode)

Specified by:

setChildNode in interface ExprNode

toEPL

public void toEPL(StringWriter writer,
                  ExprPrecedenceEnum parentPrecedence)

Specified by:

toEPL in interface ExprNodeRenderable