PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader

java.lang.Object
- javax.persistence.spi.PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader

All Implemented Interfaces:

PersistenceProviderResolver

Enclosing class:

PersistenceProviderResolverHolder
```
private static class PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader
extends java.lang.Object
implements PersistenceProviderResolver
```
Cache PersistenceProviderResolver per classloader and use the current classloader as a key. Use CachingPersistenceProviderResolver for each PersistenceProviderResolver instance.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`private static class`	`PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader.CachingPersistenceProviderResolver`	Resolve the list of Persistence providers for a given classloader and cache the results.

Field Summary

Fields
Modifier and Type Field Description

private short barrier

private java.util.WeakHashMap<java.lang.ClassLoader,PersistenceProviderResolver> resolvers

Constructor Summary

Constructors
Modifier Constructor Description

private PersistenceProviderResolverPerClassLoader()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clearCachedProviders()`	Clear cache of providers.
`private static java.lang.ClassLoader`	`getContextualClassLoader()`
`java.util.List<PersistenceProvider>`	`getPersistenceProviders()`	Returns a list of the `PersistenceProvider` implementations available in the runtime environment.

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

- Field Detail
  - resolvers
```
private final java.util.WeakHashMap<java.lang.ClassLoader,PersistenceProviderResolver> resolvers
```
  - barrier
```
private volatile short barrier
```
- Constructor Detail
  - PersistenceProviderResolverPerClassLoader
```
private PersistenceProviderResolverPerClassLoader()
```
- Method Detail
  - getPersistenceProviders
```
public java.util.List<PersistenceProvider> getPersistenceProviders()
```
    Returns a list of the PersistenceProvider implementations available in the runtime environment.
    
    Specified by:
    
    getPersistenceProviders in interface PersistenceProviderResolver
    
    Returns:
    
    list of the persistence providers available in the environment
  - clearCachedProviders
```
public void clearCachedProviders()
```
    Clear cache of providers.
    
    Specified by:
    
    clearCachedProviders in interface PersistenceProviderResolver
  - getContextualClassLoader
```
private static java.lang.ClassLoader getContextualClassLoader()
```