PropertyCache (Apache FOP 2.1 API)

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fop 2.1

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java.lang.Object
- org.apache.fop.fo.properties.PropertyCache<T>

Type Parameters:

T - The type of values that are cached
```
public final class PropertyCache<T>
extends java.lang.Object
```
Thread-safe cache that minimizes the memory requirements by fetching an instance from the cache that is equal to the given one. Internally the instances are stored in WeakReferences in order to be reclaimed when they are no longer referenced.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  PropertyCache()
  Creates a new cache.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  T fetch(T obj)
  Returns a cached version of the given object.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PropertyCache
```
public PropertyCache()
```
    Creates a new cache. The "org.apache.fop.fo.properties.use-cache" system property is used to determine whether properties should actually be cached or not. If not, then the fetch(Object) method will simply return its argument. To enable the cache, set this property to "true" (case insensitive).
- Method Detail
  - fetch
```
public T fetch(T obj)
```
    Returns a cached version of the given object. If the object is not yet in the cache, it will be added and then returned.
    
    Parameters:
    
    obj - an object
    
    Returns:
    
    a cached version of the object

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