Package org.hibernate.metamodel.source.annotations.global

Source Code of org.hibernate.metamodel.source.annotations.global.FetchProfileBinder

/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors.  All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA  02110-1301  USA
*/
package org.hibernate.metamodel.source.annotations.global;

import java.util.Arrays;
import java.util.List;

import org.jboss.jandex.AnnotationInstance;
import org.jboss.jandex.Index;

import org.hibernate.MappingException;
import org.hibernate.annotations.FetchMode;
import org.hibernate.mapping.MetadataSource;
import org.hibernate.metamodel.binding.FetchProfile;
import org.hibernate.metamodel.source.annotations.HibernateDotNames;
import org.hibernate.metamodel.source.internal.MetadataImpl;

/**
* Binds fetch profiles found in annotations.
*
* @author Hardy Ferentschik
*/
public class FetchProfileBinder {
  private FetchProfileBinder() {
  }

  /**
   * Binds all {@link org.hibernate.annotations.FetchProfiles} and {@link org.hibernate.annotations.FetchProfile} \
   * annotations to the specified meta data instance.
   *
   * @param meta the global metadata
   * @param index the annotation index repository
   */
  // TODO how to handle fetch profiles defined in hbm and annotations. Which overrides which?
  // TODO verify that association exists. See former VerifyFetchProfileReferenceSecondPass
  public static void bindFetchProfiles(MetadataImpl meta, Index index) {
    // check @FetchProfiles
    List<AnnotationInstance> fetchProfilesAnnotations = index.getAnnotations( HibernateDotNames.FETCH_PROFILES );
    for ( AnnotationInstance fetchProfilesAnnotation : fetchProfilesAnnotations ) {
      AnnotationInstance fetchProfiles[] = fetchProfilesAnnotation.value().asNestedArray();
      bindFetchProfileAnnotations( meta, Arrays.asList( fetchProfiles ) );
    }

    // check @FetchProfile
    List<AnnotationInstance> fetchProfileAnnotations = index.getAnnotations( HibernateDotNames.FETCH_PROFILE );
    bindFetchProfileAnnotations( meta, fetchProfileAnnotations );
  }

  private static void bindFetchProfileAnnotations(MetadataImpl meta, List<AnnotationInstance> fetchProfileAnnotations) {
    for ( AnnotationInstance fetchProfileAnnotation : fetchProfileAnnotations ) {
      String name = fetchProfileAnnotation.value( "name" ).asString();
      FetchProfile profile = meta.findOrCreateFetchProfile( name, MetadataSource.ANNOTATIONS );

      AnnotationInstance overrides[] = fetchProfileAnnotation.value( "fetchOverrides" ).asNestedArray();
      for ( AnnotationInstance overrideAnnotation : overrides ) {
        FetchMode fetchMode = Enum.valueOf( FetchMode.class, overrideAnnotation.value( "mode" ).asEnum() );
        if ( !fetchMode.equals( org.hibernate.annotations.FetchMode.JOIN ) ) {
          throw new MappingException( "Only FetchMode.JOIN is currently supported" );
        }

        String entityClassName = overrideAnnotation.value( "entity" ).asClass().name().toString();
        String associationName = overrideAnnotation.value( "association" ).asString();
        profile.addFetch(
            entityClassName, associationName, fetchMode.toString().toLowerCase()
        );
      }
    }
  }
}

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