How to use

org.jboss.as.jpa.classloader.JPADelegatingClassFileTransformer

constructor

private void setClassLoaderTransformer(DeploymentUnit deploymentUnit) {
  // (AS7-2233) each persistence unit can use a persistence provider, that might need
  // to use ClassTransformers.  Providers that need class transformers will add them
  // during the call to CreateContainerEntityManagerFactory.
  DelegatingClassFileTransformer transformer = deploymentUnit.getAttachment(DelegatingClassFileTransformer.ATTACHMENT_KEY);
  boolean appContainsPersistenceProviderJars = false;  // remove when we revert WFLY-10520
  if ( transformer != null) {
    for (ResourceRoot resourceRoot : DeploymentUtils.allResourceRoots(deploymentUnit)) {
      PersistenceUnitMetadataHolder holder = resourceRoot.getAttachment(PersistenceUnitMetadataHolder.PERSISTENCE_UNITS);
      if (holder != null) {
        for (PersistenceUnitMetadata pu : holder.getPersistenceUnits()) {
          if (Configuration.needClassFileTransformer(pu)) {
            transformer.addTransformer(new JPADelegatingClassFileTransformer(pu));
          }
          // remove this check when we revert WFLY-10520
          String provider = pu.getProperties().getProperty(Configuration.PROVIDER_MODULE);
          if (provider != null) {
            if (provider.equals(Configuration.PROVIDER_MODULE_APPLICATION_SUPPLIED)) {
              appContainsPersistenceProviderJars = true;
            }
          }
        }
      }
    }
    // WFLY-10520 Add Hibernate ORM 5.3 compatibility transformer
    if(!appContainsPersistenceProviderJars && hibernate51CompatibilityTransformer) {
      transformer.addTransformer(Hibernate51CompatibilityTransformer.getInstance());
    }
  }
}

private void setClassLoaderTransformer(DeploymentUnit deploymentUnit) {
  // (AS7-2233) each persistence unit can use a persistence provider, that might need
  // to use ClassTransformers.  Providers that need class transformers will add them
  // during the call to CreateContainerEntityManagerFactory.
  DelegatingClassFileTransformer transformer = deploymentUnit.getAttachment(DelegatingClassFileTransformer.ATTACHMENT_KEY);
  boolean appContainsPersistenceProviderJars = false;  // remove when we revert WFLY-10520
  if ( transformer != null) {
    for (ResourceRoot resourceRoot : DeploymentUtils.allResourceRoots(deploymentUnit)) {
      PersistenceUnitMetadataHolder holder = resourceRoot.getAttachment(PersistenceUnitMetadataHolder.PERSISTENCE_UNITS);
      if (holder != null) {
        for (PersistenceUnitMetadata pu : holder.getPersistenceUnits()) {
          if (Configuration.needClassFileTransformer(pu)) {
            transformer.addTransformer(new JPADelegatingClassFileTransformer(pu));
          }
          // remove this check when we revert WFLY-10520
          String provider = pu.getProperties().getProperty(Configuration.PROVIDER_MODULE);
          if (provider != null) {
            if (provider.equals(Configuration.PROVIDER_MODULE_APPLICATION_SUPPLIED)) {
              appContainsPersistenceProviderJars = true;
            }
          }
        }
      }
    }
    // WFLY-10520 Add Hibernate ORM 5.3 compatibility transformer
    if(!appContainsPersistenceProviderJars && hibernate51CompatibilityTransformer) {
      transformer.addTransformer(Hibernate51CompatibilityTransformer.getInstance());
    }
  }
}