com.espertech.esper.filter

Class FilterParamExprMap

java.lang.Object

com.espertech.esper.filter.FilterParamExprMap

public class FilterParamExprMap
extends Object

A two-sided map for filter parameters mapping filter expression nodes to filter parameters and back. For use in optimizing filter expressions.

Constructor Summary

Constructors

Constructor and Description
FilterParamExprMap() Ctor.

Method Summary

Modifier and Type	Method and Description
void	add(FilterParamExprMap other)
void	clear()
int	countUnassignedExpressions()
Collection<FilterSpecParam>	getFilterParams() Returns all filter parameters.
List<ExprNode>	getUnassignedExpressions() Returns all expression nodes for which no filter parameter exists.
void	put(ExprNode exprNode, FilterSpecParam param) Add a node and filter param.
ExprNode	removeEntry(FilterSpecParam param) Removes a filter parameter and it's associated expression node
void	removeNode(ExprNode node)
void	removeValue(FilterSpecParam param) Remove a filter parameter leaving the expression node in place.

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterParamExprMap

public FilterParamExprMap()

Ctor.

Method Detail

put

public void put(ExprNode exprNode,
                FilterSpecParam param)

Add a node and filter param.

Parameters:

exprNode - is the node to add

param - is null if the expression node has not optimized form

getUnassignedExpressions

public List<ExprNode> getUnassignedExpressions()

Returns all expression nodes for which no filter parameter exists.

Returns:

list of expression nodes

countUnassignedExpressions

public int countUnassignedExpressions()

getFilterParams

public Collection<FilterSpecParam> getFilterParams()

Returns all filter parameters.

Returns:

filter parameters

removeNode

public void removeNode(ExprNode node)

removeEntry

public ExprNode removeEntry(FilterSpecParam param)

Removes a filter parameter and it's associated expression node

Parameters:

param - is the parameter to remove

Returns:

expression node removed

removeValue

public void removeValue(FilterSpecParam param)

Remove a filter parameter leaving the expression node in place.

Parameters:

param - filter parameter to remove

clear

public void clear()

add

public void add(FilterParamExprMap other)