com.espertech.esper.pattern

Class EvalNodeFactoryBase

java.lang.Object

com.espertech.esper.pattern.EvalNodeFactoryBase

All Implemented Interfaces:

EvalFactoryNode, Serializable

Direct Known Subclasses:

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

public abstract class EvalNodeFactoryBase
extends Object
implements EvalFactoryNode, Serializable

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.

See Also:

Serialized Form

Method Summary

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

getPrecedence, isFilterChildNonQuitting, isStateful

Method Detail

makeEvalNode

public abstract EvalNode makeEvalNode(PatternAgentInstanceContext agentInstanceContext,
                                      EvalNode parentNode)

Specified by:

makeEvalNode in interface EvalFactoryNode

toPrecedenceFreeEPL

public abstract void toPrecedenceFreeEPL(StringWriter writer)

addChildNode

public void addChildNode(EvalFactoryNode childNode)

Adds a child node.

Specified by:

addChildNode in interface EvalFactoryNode

Parameters:

childNode - is the child evaluation tree node to add

addChildNodes

public void addChildNodes(Collection<EvalFactoryNode> childNodesToAdd)

Specified by:

addChildNodes in interface EvalFactoryNode

getChildNodes

public List<EvalFactoryNode> getChildNodes()

Returns list of child nodes.

Specified by:

getChildNodes in interface EvalFactoryNode

Returns:

list of child nodes

getFactoryNodeId

public short getFactoryNodeId()

Specified by:

getFactoryNodeId in interface EvalFactoryNode

setFactoryNodeId

public void setFactoryNodeId(short factoryNodeId)

Specified by:

setFactoryNodeId in interface EvalFactoryNode

toEPL

public final void toEPL(StringWriter writer,
                        PatternExpressionPrecedenceEnum parentPrecedence)

Description copied from interface: EvalFactoryNode

Write expression considering precendence.

Specified by:

toEPL in interface EvalFactoryNode

Parameters:

writer - to use

parentPrecedence - precendence