Need to understand broadleaf commerce custom annotation implementation

Question

I have been trying go through code of Broadleaf Commerce. There were multiple Custom Annotations used however I was not able to locate there Processor. Can anyone help me here. To take example @AdminPresentation it a custom annotation in package org.broadleafcommerce.common.presentation;

However how this is processed throughout the app, I was not able to locate. What I have understood till now we can use Reflection or AOP for its processing. But There was nothing for this.

Please help.

Source code - https://github.com/BroadleafCommerce/BroadleafCommerce

Answer 1

Have a look to :

https://www.baeldung.com/java-custom-annotation

You will get explanations about : "default" in the Custom Annotations.

Florent COUDERT.

Answer 2

For a short answer, org.broadleafcommerce.openadmin.server.dao.provider.metadata.BasicFieldMetadataProvider#addMetadata is one place that processes those annotations.

On a broader level, the controllers in the openadmin will use the AdminEntityService to get ClassMetaData (all data about how a class should be displayed to an admin user). The @AdminPresentation annotation is one source of this data. The method AdminEntityServiceImpl#getClassMetadata is the main gateway for getting the ClassMetaData.

#getClassMetadata calls #inspect and eventually gets to PersistenceManager#inspect. This method uses the DynamicEntityDao to eventually get to Metadata#getFieldMetadataForTargetClass. That method gets each field of a class via reflection, and then each of those Fields is processed through the available FieldMetadataProviders. The FieldMetadataProviders turn a java.lang.reflect.Field into org.broadleafcommerce.openadmin.dto.FieldMetadata.

Any provided FieldMetadataProvider can contribute field metadata. This metadata is used in the FormBuilderService to construct the admin page.

Class References:

AdminEntityService - org.broadleafcommerce.openadmin.server.service.AdminEntityServiceImpl

PersistenceManager - org.broadleafcommerce.openadmin.server.service.persistence.PersistenceManagerImpl#inspect

DynamicEntityDao - org.broadleafcommerce.openadmin.server.dao.DynamicEntityDaoImpl#getPropertiesForEntityClass

Metadata - org.broadleafcommerce.openadmin.server.dao.Metadata#getFieldMetadataForTargetClass

FieldMetadataProvider - org.broadleafcommerce.openadmin.server.dao.provider.metadata.FieldMetadataProvider, org.broadleafcommerce.openadmin.server.dao.DynamicEntityDaoImpl#fieldMetadataProviders

FormBuilderService - org.broadleafcommerce.openadmin.web.service.FormBuilderServiceImpl