Package net.ssehub.easy.varModel.confModel

Class QueryCache

java.lang.Object

net.ssehub.easy.varModel.confModel.QueryCache

Direct Known Subclasses:

SharedQueryCache

public class QueryCache
extends Object

A cache for ConfigQuerys based on a Configuration. As long the configuration is not recreated, the cache will store already retrieved values.

Author:

El-Sharkawy

Field Summary

Fields

Modifier and Type	Field	Description
private Configuration	config
private Map<IDatatype,List<ConstraintSyntaxTree>>	refValues	Tuple of (Reference.getType(), possible values for the reference).

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	QueryCache()	Should only be used for inheritance.
(package private)	QueryCache(Configuration config)	Default constructor for this class, creates an empty cache.

Method Summary

Modifier and Type	Method	Description
(package private) void	clear()	Clears the cache, must be called from the configuration after the configuration was refreshed.
List<ConstraintSyntaxTree>	getPossibleValues(Reference refType)	Calculates possible values (ConstraintSyntaxTree-based) for a given Reference variable.

Methods inherited from class java.lang.Object

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

Field Details

config

private Configuration config

refValues

private Map<IDatatype,List<ConstraintSyntaxTree>> refValues

Tuple of (Reference.getType(), possible values for the reference).

Constructor Details

QueryCache

protected QueryCache()

Should only be used for inheritance.

QueryCache

QueryCache(Configuration config)

Default constructor for this class, creates an empty cache.

Parameters:

config - The configuration for which this cache is used.

Method Details

clear

void clear()

Clears the cache, must be called from the configuration after the configuration was refreshed.

getPossibleValues

public List<ConstraintSyntaxTree> getPossibleValues(Reference refType)

Calculates possible values (ConstraintSyntaxTree-based) for a given Reference variable.

Parameters:

refType - The reference for which possible values should be calculated for.

Returns:

A maybe empty list of possible values for the given Reference. This list is unmodifiable and should not be stored outside of this cache.