com.espertech.esper.core.service

Interface StatementVariableRef

All Known Implementing Classes:

StatementVariableRefImpl

public interface StatementVariableRef

Service for maintaining references between statement name and variables.

Method Summary

Modifier and Type	Method and Description
void	addConfiguredVariable(String variableName) Add a preconfigured variable.
void	addReferences(String statementName, Set<String> variablesReferenced, ExprTableAccessNode[] tableNodes) Add a reference from a statement name to a set of variables.
void	addReferences(String statementName, String variableReferenced) Add a reference from a statement name to a single variable.
Set<String>	getStatementNamesForVar(String variableName) Returns the set of statement names that use a given variable.
boolean	isInUse(String variableName) Returns true if the variable is listed as in-use by any statement, or false if not
void	removeConfiguredVariable(String variableName) Remove a preconfigured variable.
void	removeReferencesStatement(String statementName) Remove all references for a given statement.
void	removeReferencesVariable(String variableName) Remove all references for a given event type.

Method Detail

isInUse

boolean isInUse(String variableName)

Returns true if the variable is listed as in-use by any statement, or false if not

Parameters:

variableName - name

Returns:

indicator whether variable is in use

getStatementNamesForVar

Set<String> getStatementNamesForVar(String variableName)

Returns the set of statement names that use a given variable.

Parameters:

variableName - name

Returns:

set of statements or null if none found

addReferences

void addReferences(String statementName,
                   Set<String> variablesReferenced,
                   ExprTableAccessNode[] tableNodes)

Add a reference from a statement name to a set of variables.

Parameters:

statementName - name of statement

variablesReferenced - types

tableNodes - table nodes, if any

addReferences

void addReferences(String statementName,
                   String variableReferenced)

Add a reference from a statement name to a single variable.

Parameters:

statementName - name of statement

variableReferenced - variable

removeReferencesStatement

void removeReferencesStatement(String statementName)

Remove all references for a given statement.

Parameters:

statementName - statement name

removeReferencesVariable

void removeReferencesVariable(String variableName)

Remove all references for a given event type.

Parameters:

variableName - variable name

addConfiguredVariable

void addConfiguredVariable(String variableName)

Add a preconfigured variable.

Parameters:

variableName - name

removeConfiguredVariable

void removeConfiguredVariable(String variableName)

Remove a preconfigured variable.

Parameters:

variableName - var