com.espertech.esper.pattern

Interface EvalFactoryNode

All Known Implementing Classes:

EvalAndFactoryNode, EvalAuditFactoryNode, EvalEveryDistinctFactoryNode, EvalEveryFactoryNode, EvalFilterFactoryNode, EvalFollowedByFactoryNode, EvalGuardFactoryNode, EvalMatchUntilFactoryNode, EvalNodeFactoryBase, EvalNotFactoryNode, EvalObserverFactoryNode, EvalOrFactoryNode, EvalRootFactoryNode

public interface EvalFactoryNode

Superclass of all nodes in an evaluation tree representing an event pattern expression. Follows the Composite pattern. Child nodes do not carry references to parent nodes, the tree is unidirectional.

Method Summary

Modifier and Type	Method and Description
void	addChildNode(EvalFactoryNode childNode) Adds a child node.
void	addChildNodes(Collection<EvalFactoryNode> childNodes)
List<EvalFactoryNode>	getChildNodes() Returns list of child nodes
short	getFactoryNodeId()
PatternExpressionPrecedenceEnum	getPrecedence() Returns precendence.
boolean	isFilterChildNonQuitting()
boolean	isStateful()
EvalNode	makeEvalNode(PatternAgentInstanceContext agentInstanceContext, EvalNode parentNode)
void	setFactoryNodeId(short factoryNodeId)
void	toEPL(StringWriter writer, PatternExpressionPrecedenceEnum parentPrecedence) Write expression considering precendence.

Method Detail

addChildNode

void addChildNode(EvalFactoryNode childNode)

Adds a child node.

Parameters:

childNode - is the child evaluation tree node to add

getChildNodes

List<EvalFactoryNode> getChildNodes()

Returns list of child nodes

Returns:

list of child nodes

addChildNodes

void addChildNodes(Collection<EvalFactoryNode> childNodes)

makeEvalNode

EvalNode makeEvalNode(PatternAgentInstanceContext agentInstanceContext,
                      EvalNode parentNode)

isFilterChildNonQuitting

boolean isFilterChildNonQuitting()

getFactoryNodeId

short getFactoryNodeId()

setFactoryNodeId

void setFactoryNodeId(short factoryNodeId)

isStateful

boolean isStateful()

getPrecedence

PatternExpressionPrecedenceEnum getPrecedence()

Returns precendence.

Returns:

precendence

toEPL

void toEPL(StringWriter writer,
           PatternExpressionPrecedenceEnum parentPrecedence)

Write expression considering precendence.

Parameters:

writer - to use

parentPrecedence - precendence