DefaultIndexConstraint.java

/*
 * 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
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 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
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package gov.nist.secauto.metaschema.core.model.constraint;

import gov.nist.secauto.metaschema.core.datatype.markup.MarkupLine;
import gov.nist.secauto.metaschema.core.datatype.markup.MarkupMultiline;
import gov.nist.secauto.metaschema.core.metapath.MetapathExpression;
import gov.nist.secauto.metaschema.core.util.ObjectUtils;

import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.xml.namespace.QName;

import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;

public final class DefaultIndexConstraint
    extends AbstractKeyConstraint
    implements IIndexConstraint {
  @NonNull
  private final String name;

  /**
   * Create a index constraint, which uses a set of key fields to build a key.
   *
   * @param id
   *          the optional identifier for the constraint
   * @param formalName
   *          the constraint's formal name or {@code null} if not provided
   * @param description
   *          the constraint's semantic description or {@code null} if not
   *          provided
   * @param source
   *          information about the constraint source
   * @param level
   *          the significance of a violation of this constraint
   * @param target
   *          the Metapath expression identifying the nodes the constraint targets
   * @param properties
   *          a collection of associated properties
   * @param name
   *          the name of the index
   * @param keyFields
   *          a list of key fields associated with the constraint
   * @param remarks
   *          optional remarks describing the intent of the constraint
   */
  private DefaultIndexConstraint(
      @Nullable String id,
      @Nullable String formalName,
      @Nullable MarkupLine description,
      @NonNull ISource source,
      @NonNull Level level,
      @NonNull MetapathExpression target,
      @NonNull Map<QName, Set<String>> properties,
      @NonNull String name,
      @NonNull List<DefaultKeyField> keyFields,
      @Nullable MarkupMultiline remarks) {
    super(id, formalName, description, source, level, target, properties, keyFields, remarks);
    if (name.isBlank()) {
      throw new IllegalArgumentException("The index name must be a non-blank string");
    }
    this.name = name;
  }

  @Override
  public String getName() {
    return name;
  }

  @Override
  public <T, R> R accept(IConstraintVisitor<T, R> visitor, T state) {
    return visitor.visitIndexConstraint(this, state);
  }

  @NonNull
  public static Builder builder() {
    return new Builder();
  }

  public static final class Builder
      extends AbstractKeyConstraintBuilder<Builder, DefaultIndexConstraint> {
    private String name;

    private Builder() {
      // disable construction
    }

    public Builder name(@NonNull String name) {
      this.name = name;
      return this;
    }

    @Override
    protected Builder getThis() {
      return this;
    }

    @Override
    protected void validate() {
      super.validate();

      ObjectUtils.requireNonNull(name);
    }

    protected String getName() {
      return name;
    }

    @Override
    protected DefaultIndexConstraint newInstance() {
      return new DefaultIndexConstraint(
          getId(),
          getFormalName(),
          getDescription(),
          ObjectUtils.notNull(getSource()),
          getLevel(),
          getTarget(),
          getProperties(),
          ObjectUtils.notNull(getName()),
          getKeyFields(),
          getRemarks());
    }
  }
}