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/*
 * Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 David Berkman
 * 
 * This file is part of the SmallMind Code Project.
 * 
 * The SmallMind Code Project is free software, you can redistribute
 * it and/or modify it under either, at your discretion...
 * 
 * 1) The terms of GNU Affero General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version.
 * 
 * ...or...
 * 
 * 2) The terms of the Apache License, Version 2.0.
 * 
 * The SmallMind Code Project is distributed in the hope that it will
 * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License or Apache License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * and the Apache License along with the SmallMind Code Project. If not, see
 *  or .
 * 
 * Additional permission under the GNU Affero GPL version 3 section 7
 * ------------------------------------------------------------------
 * If you modify this Program, or any covered work, by linking or
 * combining it with other code, such other code is not for that reason
 * alone subject to any of the requirements of the GNU Affero GPL
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 */
package org.smallmind.persistence.query;

import org.smallmind.nutsnbolts.lang.UnknownSwitchCaseException;

public class WhereUtility {

  public static void walk (Where where, WhereVisitor visitor) {

    walkConjunction(where.getRootConjunction(), visitor);
  }

  private static void walkConjunction (WhereConjunction whereConjunction, WhereVisitor visitor) {

    visitor.visitConjunction(whereConjunction);

    for (WhereCriterion criterion : whereConjunction.getCriteria()) {
      switch (criterion.getCriterionType()) {
        case CONJUNCTION:
          walkConjunction((WhereConjunction)criterion, visitor);
          break;
        case FIELD:
          visitor.visitField((WhereField)criterion);
          break;
        default:
          throw new UnknownSwitchCaseException(criterion.getCriterionType().name());
      }
    }
  }
}