org.clazzes.util.jpa.provider
Class ProviderClassFactory
java.lang.Object
org.clazzes.util.jpa.provider.ProviderClassFactory
public class ProviderClassFactory
- extends java.lang.Object
This class is used to instantiate class instances from the JPA provider without
actually tying to a specific implementation.
This is an example usage of this class in order to retrieve openjpa's Temporary
class loader implementation inside a blueprint container:
<bp:reference id="persistenceProvider" interface="javax.persistence.spi.PersistenceProvider"/>
<bp:bean id="providerClassFactory" class="org.clazzes.util.jpa.provider.ProviderClassFactory">
<bp:property name="persistenceProvider" ref="persistenceProvider"/>
</bp:bean>
<bp:bean id="temporaryClassLoaderClass" factory-ref="providerClassFactory" factory-method="loadClass">
<bp:argument value="org.apache.openjpa.lib.util.TemporaryClassLoader"/>
</bp:bean>
Method Summary |
javax.persistence.spi.PersistenceProvider |
getPersistenceProvider()
|
java.lang.Class<?> |
loadClass(java.lang.String clazzName)
load a class from the class loader of the persistence provider. |
void |
setPersistenceProvider(javax.persistence.spi.PersistenceProvider persistenceProvider)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ProviderClassFactory
public ProviderClassFactory()
loadClass
public java.lang.Class<?> loadClass(java.lang.String clazzName)
throws java.lang.ClassNotFoundException
- load a class from the class loader of the persistence provider.
- Parameters:
clazzName
- The name of the class.
- Returns:
- The class for the given name.
- Throws:
java.lang.ClassNotFoundException
- If the class could not be found in the
JPA povider's bundle.
getPersistenceProvider
public javax.persistence.spi.PersistenceProvider getPersistenceProvider()
- Returns:
- the persistenceProvider usually injected using blueprint.
setPersistenceProvider
public void setPersistenceProvider(javax.persistence.spi.PersistenceProvider persistenceProvider)
- Parameters:
persistenceProvider
- the persistenceProvider, which is typically a service reference
obtained by blueprint.
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