CachingProperty (JOSM)

java.lang.Object
- org.openstreetmap.josm.data.preferences.AbstractProperty<T>
- - org.openstreetmap.josm.data.preferences.CachingProperty<T>

Type Parameters:

T - property type

All Implemented Interfaces:

AbstractProperty.ValueChangeListener<T>
```
public class CachingProperty<T>
extends AbstractProperty<T>
implements AbstractProperty.ValueChangeListener<T>
```
This is a special wrapper of AbstractProperty. The current preference value is cached. The value is invalidated if the preference was changed.

Since:

10824

Nested Class Summary
- Nested classes/interfaces inherited from class org.openstreetmap.josm.data.preferences.AbstractProperty
  AbstractProperty.InvalidPreferenceValueException, AbstractProperty.ValueChangeEvent<T>, AbstractProperty.ValueChangeListener<T>

Field Summary

Fields
Modifier and Type Field Description

private T cache

private boolean cacheValid

private AbstractProperty<T> toCache
- Fields inherited from class org.openstreetmap.josm.data.preferences.AbstractProperty
  defaultValue, key, preferences

Constructor Summary

Constructors
Constructor Description

CachingProperty(AbstractProperty<T> toCache)
Create a new caching property.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`T`	`get()`	Replies the value of this property.
`boolean`	`put(T value)`	Sets this property to the specified value.
`void`	`valueChanged(AbstractProperty.ValueChangeEvent<? extends T> e)`	Method called when a property value has changed.

Methods inherited from class org.openstreetmap.josm.data.preferences.AbstractProperty
addListener, addListenerImpl, addWeakListener, cached, equals, getDefaultValue, getKey, getPreferences, hashCode, isSet, remove, removeListener, removeListenerImpl, storeDefaultValue

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - cache
```
private T cache
```
  - cacheValid
```
private boolean cacheValid
```
  - toCache
```
private final AbstractProperty<T> toCache
```
- Constructor Detail
  - CachingProperty
```
CachingProperty(AbstractProperty<T> toCache)
```
    Create a new caching property.
    
    Parameters:
    
    toCache - The property to cache.
- Method Detail
  - get
```
public T get()
```
    Description copied from class: AbstractProperty
    
    Replies the value of this property.
    
    Specified by:
    
    get in class AbstractProperty<T>
    
    Returns:
    
    the value of this property
  - put
```
public boolean put(T value)
```
    Description copied from class: AbstractProperty
    
    Sets this property to the specified value.
    
    Specified by:
    
    put in class AbstractProperty<T>
    
    Parameters:
    
    value - The new value of this property
    
    Returns:
    
    true if something has changed (i.e. value is different than before)
  - valueChanged
```
public void valueChanged(AbstractProperty.ValueChangeEvent<? extends T> e)
```
    Description copied from interface: AbstractProperty.ValueChangeListener
    
    Method called when a property value has changed.
    
    Specified by:
    
    valueChanged in interface AbstractProperty.ValueChangeListener<T>
    
    Parameters:
    
    e - property change event