How to use

nonNullCollection

method

in

org.apache.sis.metadata.iso.lineage.DefaultLineage

/**
 * Returns the information about about events in the life of a resource specified by the scope.
 *
 * @return information about events in the life of a resource.
 */
@Override
@XmlElement(name = "processStep")
public Collection<ProcessStep> getProcessSteps() {
  return processSteps = nonNullCollection(processSteps, ProcessStep.class);
}

/**
 * Returns information about the source data used in creating the data specified by the scope.
 *
 * @return information about the source data.
 */
@Override
@XmlElement(name = "source")
public Collection<Source> getSources() {
  return sources = nonNullCollection(sources, Source.class);
}

/**
 * Returns the information about about events in the life of a resource specified by the scope.
 *
 * @return information about events in the life of a resource.
 */
@Override
@XmlElement(name = "processStep")
public Collection<ProcessStep> getProcessSteps() {
  return processSteps = nonNullCollection(processSteps, ProcessStep.class);
}

/**
 * Returns information about the source data used in creating the data specified by the scope.
 *
 * @return information about the source data.
 */
@Override
@XmlElement(name = "source")
public Collection<Source> getSources() {
  return sources = nonNullCollection(sources, Source.class);
}

  /**
   * Returns additional documentation.
   *
   * @return additional documentation.
   *
   * @since 0.5
   */
/// @XmlElement(name = "additionalDocumentation")
  @UML(identifier="additionalDocumentation", obligation=OPTIONAL, specification=ISO_19115)
  public Collection<Citation> getAdditionalDocumentation() {
    return additionalDocumentation = nonNullCollection(additionalDocumentation, Citation.class);
  }

/**
 * Returns additional documentation.
 *
 * @return additional documentation.
 *
 * @since 0.5
 */
// @XmlElement at the end of this class.
@UML(identifier="additionalDocumentation", obligation=OPTIONAL, specification=ISO_19115)
public Collection<Citation> getAdditionalDocumentation() {
  return additionalDocumentation = nonNullCollection(additionalDocumentation, Citation.class);
}