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

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

/*
* 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.HashMap;
import java.util.List;
import java.util.Map;

import org.hibernate.AnnotationException;
import org.hibernate.annotations.TypeDefs;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.StringHelper;
import org.hibernate.metamodel.binding.TypeDef;
import org.hibernate.metamodel.source.MetadataImplementor;
import org.hibernate.metamodel.source.annotations.AnnotationBindingContext;
import org.hibernate.metamodel.source.annotations.HibernateDotNames;
import org.hibernate.metamodel.source.annotations.JandexHelper;

import org.jboss.jandex.AnnotationInstance;
import org.jboss.logging.Logger;

/**
* Binds {@link org.hibernate.annotations.TypeDef} and {@link TypeDefs}.
*
* @author Hardy Ferentschik
*/
public class TypeDefBinder {

  private static final CoreMessageLogger LOG = Logger.getMessageLogger(
      CoreMessageLogger.class,
      TypeDefBinder.class.getName()
  );

  /**
   * Binds all {@link org.hibernate.annotations.TypeDef} and {@link TypeDefs} annotations to the supplied metadata.
   *
   * @param bindingContext the context for annotation binding
   */
  public static void bind(AnnotationBindingContext bindingContext) {
    List<AnnotationInstance> annotations = bindingContext.getIndex().getAnnotations( HibernateDotNames.TYPE_DEF );
    for ( AnnotationInstance typeDef : annotations ) {
      bind( bindingContext.getMetadataImplementor(), typeDef );
    }

    annotations = bindingContext.getIndex().getAnnotations( HibernateDotNames.TYPE_DEFS );
    for ( AnnotationInstance typeDefs : annotations ) {
      AnnotationInstance[] typeDefAnnotations = JandexHelper.getValue(
          typeDefs,
          "value",
          AnnotationInstance[].class
      );
      for ( AnnotationInstance typeDef : typeDefAnnotations ) {
        bind( bindingContext.getMetadataImplementor(), typeDef );
      }
    }
  }

  private static void bind(MetadataImplementor metadata, AnnotationInstance typeDefAnnotation) {
    String name = JandexHelper.getValue( typeDefAnnotation, "name", String.class );
    String defaultForType = JandexHelper.getValue( typeDefAnnotation, "defaultForType", String.class );
    String typeClass = JandexHelper.getValue( typeDefAnnotation, "typeClass", String.class );

    boolean noName = StringHelper.isEmpty( name );
    boolean noDefaultForType = defaultForType == null || defaultForType.equals( void.class.getName() );

    if ( noName && noDefaultForType ) {
      throw new AnnotationException(
          "Either name or defaultForType (or both) attribute should be set in TypeDef having typeClass "
              + typeClass
      );
    }

    Map<String, String> parameterMaps = new HashMap<String, String>();
    AnnotationInstance[] parameterAnnotations = JandexHelper.getValue(
        typeDefAnnotation,
        "parameters",
        AnnotationInstance[].class
    );
    for ( AnnotationInstance parameterAnnotation : parameterAnnotations ) {
      parameterMaps.put(
          JandexHelper.getValue( parameterAnnotation, "name", String.class ),
          JandexHelper.getValue( parameterAnnotation, "value", String.class )
      );
    }

    if ( !noName ) {
      bind( name, typeClass, parameterMaps, metadata );
    }
    if ( !noDefaultForType ) {
      bind( defaultForType, typeClass, parameterMaps, metadata );
    }
  }

  private static void bind(
      String name,
      String typeClass,
      Map<String, String> prms,
      MetadataImplementor metadata) {
    LOG.debugf( "Binding type definition: %s", name );
    metadata.addTypeDefinition( new TypeDef( name, typeClass, prms ) );
  }

  private TypeDefBinder() {
  }
}
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