How to use

asCollection

method

in

org.apache.stanbol.entityhub.servicesapi.util.ModelUtils

  results = ModelUtils.asCollection(r.get(property.toString()));
} else {
  results = new LinkedHashSet<Object>();

/**
 * Getter for the id of the Entity the parsed {@link Representation metadata}
 * are {@link RdfResourceEnum#aboutRepresentation about}.
 * @param metadata the metadata
 * @return the id of the entity or <code>null</code> if the parsed {@link Representation}
 * is <code>null</code> or does not define a value for 
 * {@link RdfResourceEnum#aboutRepresentation}
 */
public static String getAboutRepresentation(Representation metadata) throws IllegalStateException{
  if(metadata == null){
    return null;
  }
  Iterator<Reference> refs = metadata.getReferences(RdfResourceEnum.aboutRepresentation.getUri());
  if(refs.hasNext()){
    Reference about = refs.next();
    if(refs.hasNext()){
      log.warn("The parsed Representation {} claims to be the metadata of" +
        "multiple Entities (entities: {})", 
        metadata.getId(),
        asCollection(metadata.getReferences(RdfResourceEnum.aboutRepresentation.getUri())));
    }
    return about.getReference();
  } else {
    return null;
  }
}

/**
 * Getter for the id of the Entity the parsed {@link Representation metadata}
 * are {@link RdfResourceEnum#aboutRepresentation about}.
 * @param metadata the metadata
 * @return the id of the entity or <code>null</code> if the parsed {@link Representation}
 * is <code>null</code> or does not define a value for 
 * {@link RdfResourceEnum#aboutRepresentation}
 */
public static String getAboutRepresentation(Representation metadata) throws IllegalStateException{
  if(metadata == null){
    return null;
  }
  Iterator<Reference> refs = metadata.getReferences(RdfResourceEnum.aboutRepresentation.getUri());
  if(refs.hasNext()){
    Reference about = refs.next();
    if(refs.hasNext()){
      log.warn("The parsed Representation {} claims to be the metadata of" +
        "multiple Entities (entities: {})", 
        metadata.getId(),
        asCollection(metadata.getReferences(RdfResourceEnum.aboutRepresentation.getUri())));
    }
    return about.getReference();
  } else {
    return null;
  }
}

private void deleteMappingsbyTarget(String id) throws YardException {
  if(id != null && !id.isEmpty()){
    FieldQuery fieldQuery = getQueryFactory().createFieldQuery();
    fieldQuery.setConstraint(RdfResourceEnum.mappingTarget.getUri(), new ReferenceConstraint(id));
    deleteEntities(ModelUtils.asCollection(
      entityhubYard.findReferences(fieldQuery).iterator()));
  }
}

private void deleteMappingsbyTarget(String id) throws YardException {
  if(id != null && !id.isEmpty()){
    FieldQuery fieldQuery = getQueryFactory().createFieldQuery();
    fieldQuery.setConstraint(RdfResourceEnum.mappingTarget.getUri(), new ReferenceConstraint(id));
    deleteEntities(ModelUtils.asCollection(
      entityhubYard.findReferences(fieldQuery).iterator()));
  }
}

Iterator<Reference> types = r.getReferences(TYPE_FIELD);
if(types != null && types.hasNext()) {
  jResult.put("type", new JSONArray(ModelUtils.asCollection(types)));