com.espertech.esper.client.soda

Interface PatternExpr

All Superinterfaces:

Serializable

All Known Implementing Classes:

PatternAndExpr, PatternEveryDistinctExpr, PatternEveryExpr, PatternExprBase, PatternExprPlaceholder, PatternFilterExpr, PatternFollowedByExpr, PatternGuardExpr, PatternMatchUntilExpr, PatternNotExpr, PatternObserverExpr, PatternOrExpr

public interface PatternExpr
extends Serializable

Interface representing a pattern expression.

Pattern expressions are organized into a tree-like structure with nodes representing sub-expressions (composite).

Certain types of nodes have certain requirements towards the number or types of nodes that are expected as pattern sub-expressions to an pattern expression.

Method Summary

Modifier and Type	Method and Description
List<PatternExpr>	getChildren() Returns the list of pattern sub-expressions (child expressions) to the current pattern expression node.
PatternExprPrecedenceEnum	getPrecedence() Returns the precedence.
String	getTreeObjectName() Returns the id for the pattern expression, for use by tools.
void	setChildren(List<PatternExpr> children) Sets the list of pattern sub-expressions (child expressions) to the current pattern expression node.
void	setTreeObjectName(String objectName) Sets and id for the pattern expression, for use by tools.
void	toEPL(StringWriter writer, PatternExprPrecedenceEnum parentPrecedence, EPStatementFormatter formatter) Renders the pattern expression and all it's child expressions, in full tree depth, as a string in language syntax.

Method Detail

getChildren

List<PatternExpr> getChildren()

Returns the list of pattern sub-expressions (child expressions) to the current pattern expression node.

Returns:

pattern child expressions or empty list if there are no child expressions

setChildren

void setChildren(List<PatternExpr> children)

Sets the list of pattern sub-expressions (child expressions) to the current pattern expression node.

Parameters:

children - pattern child expressions or empty list if there are no child expressions

getPrecedence

PatternExprPrecedenceEnum getPrecedence()

Returns the precedence.

Returns:

precedence

toEPL

void toEPL(StringWriter writer,
           PatternExprPrecedenceEnum parentPrecedence,
           EPStatementFormatter formatter)

Renders the pattern expression and all it's child expressions, in full tree depth, as a string in language syntax.

Parameters:

writer - is the output to use

parentPrecedence - precedence

formatter - formatter

getTreeObjectName

String getTreeObjectName()

Returns the id for the pattern expression, for use by tools.

Returns:

id

setTreeObjectName

void setTreeObjectName(String objectName)

Sets and id for the pattern expression, for use by tools.

Parameters:

objectName - id