QueryCache (EASy-Producer Documentation API)

java.lang.Object
- net.ssehub.easy.varModel.confModel.QueryCache

Direct Known Subclasses:

SharedQueryCache
```
public class QueryCache
extends java.lang.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 java.util.Map<IDatatype,java.util.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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(package private) void`	`clear()`	Clears the cache, must be called from the configuration after the configuration was refreshed.
`java.util.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 Detail
  - config
```
private Configuration config
```
  - refValues
```
private java.util.Map<IDatatype,java.util.List<ConstraintSyntaxTree>> refValues
```
    Tuple of (Reference.getType(), possible values for the reference).
- Constructor Detail
  - 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 Detail
  - clear
```
void clear()
```
    Clears the cache, must be called from the configuration after the configuration was refreshed.
  - getPossibleValues
```
public java.util.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.