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The core API for working with Metaschema-based models.

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/*
 * Portions of this software was developed by employees of the National Institute
 * of Standards and Technology (NIST), an agency of the Federal Government and is
 * being made available as a public service. Pursuant to title 17 United States
 * Code Section 105, works of NIST employees are not subject to copyright
 * protection in the United States. This software may be subject to foreign
 * copyright. Permission in the United States and in foreign countries, to the
 * extent that NIST may hold copyright, to use, copy, modify, create derivative
 * works, and distribute this software and its documentation without fee is hereby
 * granted on a non-exclusive basis, provided that this notice and disclaimer
 * of warranty appears in all copies.
 *
 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
 */

package gov.nist.secauto.metaschema.model.common;

/**
 * This marker interface indicates that this object is an instance.
 */
public interface IInstance extends IModelElement {
  /**
   * Retrieve the Metaschema definition on which the instance was declared. This value will typically
   * not be {@code null}, except in the case that the instance represents a definition at the root.
   * 
   * @return the Metaschema definition on which the instance was declared
   */
  // TODO: Make this not null
  INamedModelDefinition getContainingDefinition();

  @Override
  default IMetaschema getContainingMetaschema() {
    return getContainingDefinition().getContainingMetaschema();
  }

  /**
   * Generates a "coordinate" string for the provided information element instance.
   * 
   * A coordinate consists of the element's:
   * 
   * containing Metaschema's short name
   * model type
   * name
   * hash code
   * the hash code of the definition
   * 
   * 
   * @return the coordinate
   */
  @SuppressWarnings("null")
  @Override
  default String toCoordinates() {
    IMetaschema metaschema = getContainingMetaschema();

    // TODO: revisit this to add more context i.e. the containing definition
    return String.format("%s:%s", metaschema.getShortName(), getModelType());
  }
}