Examples of javax.persistence.spi.ClassTransformer

javax.persistence.spi.ClassTransformer
A persistence provider provides an instance of this interface to the PersistenceUnitInfo.addTransformer method. The supplied transformer instance will get called to transform entity class files when they are loaded and redefined. The transformation occurs before the class is defined by the JVM @author Bill Burke @version $Revision: 11282 $

        persistenceUnitInfo.setNewTempClassLoader(tempLoader);


        EntityManagerSetupImpl emSetupImpl = new EntityManagerSetupImpl(persistenceUnitUniqueName, sessionName);


        // A call to predeploy will partially build the session we will use
        final ClassTransformer transformer = emSetupImpl.predeploy(persistenceUnitInfo, mergedProperties);


        // After preDeploy it's impossible to weave again - so may substitute the temporary classloader with the real one.
        // The temporary classloader could be garbage collected even if the puInfo is cached for the future use by other emSetupImpls.
        persistenceUnitInfo.setNewTempClassLoader(persistenceUnitInfo.getClassLoader());

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            }
            Iterator<SEPersistenceUnitInfo> persistenceUnitsIterator = persistenceUnitsList.iterator();
            while (persistenceUnitsIterator.hasNext()) {
                SEPersistenceUnitInfo unitInfo = persistenceUnitsIterator.next();
                //build class transformer.
                ClassTransformer transformer = buildTransformer(unitInfo,this.logWriter,this.logLevel);
                classTransformers.add(transformer);
            }
        } catch (ZipException e) {
            throw StaticWeaveException.exceptionOpeningArchive(inputArchiveURL,e);
        } finally {

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                    sessionName = puName;
                }
                EntityManagerSetupImpl emSetupImpl = new EntityManagerSetupImpl(puName, sessionName);
                //indicates that predeploy is used for static weaving, also passes logging parameters
                emSetupImpl.setStaticWeaveInfo(this.info);
                ClassTransformer transformer = emSetupImpl.predeploy(unitInfo, emptyMap);
                if (transformer != null) {
                    classTransformers.add(transformer);
                }
            }
        } catch (ZipException e) {

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        persistenceUnitInfo.setNewTempClassLoader(tempLoader);


        EntityManagerSetupImpl emSetupImpl = new EntityManagerSetupImpl(persistenceUnitUniqueName, sessionName);


        // A call to predeploy will partially build the session we will use
        final ClassTransformer transformer = emSetupImpl.predeploy(persistenceUnitInfo, mergedProperties);


        // After preDeploy it's impossible to weave again - so may substitute the temporary classloader with the real one.
        // The temporary classloader could be garbage collected even if the puInfo is cached for the future use by other emSetupImpls.
        persistenceUnitInfo.setNewTempClassLoader(persistenceUnitInfo.getClassLoader());

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        Constants.BUNDLE_VERSION_ATTRIBUTE + "=0.0.0");
  }
  
  @Test
  public void testMultipleTransformers() {
    ClassTransformer ct1b = Skeleton.newMock(ClassTransformer.class);
    ServiceReference provider1 = basicProviderSetup(null);
    JPAWeavingHook tr = (JPAWeavingHook) TransformerRegistryFactory.getTransformerRegistry();
       
    //Add a transforme and check it gets called to weave
    tr.addTransformer(b1, ct1a, provider1);

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        Constants.BUNDLE_VERSION_ATTRIBUTE + "=0.0.0");
  }
  
  @Test
  public void testMultipleTransformers2() {
    ClassTransformer ct1b = Skeleton.newMock(ClassTransformer.class);
    ServiceReference provider1 = basicProviderSetup(null);
    JPAWeavingHook tr = (JPAWeavingHook) TransformerRegistryFactory.getTransformerRegistry();
    
    //Add a two transformers that will return null
    tr.addTransformer(b1, ct1a, provider1);

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  }
  
  
  @Test
  public void testMultipleTransformers3() {
    ClassTransformer ct1b = Skeleton.newMock(ClassTransformer.class);
    ServiceReference provider1 = basicProviderSetup(null);
    JPAWeavingHook tr = (JPAWeavingHook) TransformerRegistryFactory.getTransformerRegistry();
      
    //Add a two transformers that will return null
    tr.addTransformer(b1, ct1a, provider1);

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  }
  
  @Test
  public void testWeavingPackages() {
    ClassTransformer ct1b = Skeleton.newMock(ClassTransformer.class);
    ServiceReference provider1 = basicProviderSetup(new String[] {"specifiedPackage1", "specifiedPackage2;attribute=value"});
    JPAWeavingHook tr = (JPAWeavingHook) TransformerRegistryFactory.getTransformerRegistry();
       
    //Add a transforme and check it gets called to weave
    tr.addTransformer(b1, ct1a, provider1);

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