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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.constraint;

import gov.nist.secauto.metaschema.model.common.datatype.markup.MarkupMultiline;
import gov.nist.secauto.metaschema.model.common.metapath.MetapathExpression;

import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.regex.Pattern;

public class DefaultKeyField implements IKeyField {

  @Nullable
  private final Pattern pattern;
  @NotNull
  private final MetapathExpression target;
  @Nullable
  private final MarkupMultiline remarks;

  /**
   * Construct a new key field based on the provided target. An optional pattern can be used to
   * extract a portion of the resulting key value.
   * 
   * @param target
   *          a Metapath expression identifying the target of the key field
   * @param pattern
   *          an optional used to extract a portion of the resulting key value
   * @param remarks
   *          optional remarks describing the intent of the constraint
   */
  public DefaultKeyField(
      @NotNull MetapathExpression target,
      @Nullable Pattern pattern,
      @Nullable MarkupMultiline remarks) {
    this.pattern = pattern;
    this.target = target;
    this.remarks = remarks;
  }

  @Override
  public Pattern getPattern() {
    return pattern;
  }

  @Override
  public MetapathExpression getTarget() {
    return target;
  }

  @Override
  public MarkupMultiline getRemarks() {
    return remarks;
  }

}