001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
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004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
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010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.jena;
014
015import org.apache.juneau.*;
016import org.apache.juneau.jena.annotation.*;
017
018/**
019 * Metadata on beans specific to the RDF serializers and parsers pulled from the {@link Rdf @Rdf} annotation on the
020 * class.
021 */
022public class RdfBeanMeta extends ExtendedBeanMeta {
023
024   // RDF related fields
025   private final BeanPropertyMeta beanUriProperty;    // Bean property that identifies the URI of the bean.
026
027   /**
028    * Constructor.
029    *
030    * @param beanMeta The metadata on the bean that this metadata applies to.
031    * @param mp RDF metadata provider (for finding information about other artifacts).
032    */
033   public RdfBeanMeta(BeanMeta<?> beanMeta, RdfMetaProvider mp) {
034      super(beanMeta);
035
036      BeanPropertyMeta t_beanUriProperty = null;
037      for (BeanPropertyMeta p : beanMeta.getPropertyMetas()) {
038         RdfBeanPropertyMeta bpm = mp.getRdfBeanPropertyMeta(p);
039         if (bpm.isBeanUri())
040            t_beanUriProperty = p;
041      }
042
043      this.beanUriProperty = t_beanUriProperty;
044   }
045
046   /**
047    * Returns <jk>true</jk> if one of the properties on this bean is annotated with {@link Rdf#beanUri() @Rdf(beanUri)} as
048    * <jk>true</jk>
049    *
050    * @return <jk>true</jk> if there is a URI property associated with this bean.
051    */
052   public boolean hasBeanUri() {
053      return beanUriProperty != null;
054   }
055
056   /**
057    * Returns the bean property marked as the URI for the bean (annotated with {@link Rdf#beanUri() @Rdf(beanUri)} as <jk>true</jk>).
058    *
059    * @return The URI property, or <jk>null</jk> if no URI property exists on this bean.
060    */
061   public BeanPropertyMeta getBeanUriProperty() {
062      return beanUriProperty;
063   }
064}