code: ///////////////////////////////////////////////////////////////////////////////
  // For information as to what this class does, see the Javadoc, below.       //
  // Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,       //
  // 2007, 2008, 2009, 2010, 2014, 2015 by Peter Spirtes, Richard Scheines, Joseph   //
  // Ramsey, and Clark Glymour.                                                //
  //                                                                           //
  // This program is free software; you can redistribute it and/or modify      //
  // it under the terms of the GNU General Public License as published by      //
  // the Free Software Foundation; either version 2 of the License, or         //
  // (at your option) any later version.                                       //
  //                                                                           //
  // This program 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 for more details.                              //
  //                                                                           //
  // You should have received a copy of the GNU General Public License         //
  // along with this program; if not, write to the Free Software               //
  // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA //
  ///////////////////////////////////////////////////////////////////////////////
  
  package edu.cmu.tetrad.search;
  
  import edu.cmu.tetrad.data.DataType;
  import edu.cmu.tetrad.util.TetradSerializable;
  
  import java.io.ObjectStreamException;
  
  /**
   * A typesafe enumeration of the types of independence tests that are used for basic search algorithm in this package.
   *
   * @author Joseph Ramsey
   */
  public final class IndTestType implements TetradSerializable {
      static final long serialVersionUID = 23L;
  
      public static final IndTestType DEFAULT = new IndTestType("Default", null);
      public static final IndTestType CORRELATION_T =
              new IndTestType("Correlation T Test", DataType.Continuous);
      public static final IndTestType FISHER_Z = new IndTestType("Fisher's Z", DataType.Continuous);
      public static final IndTestType LINEAR_REGRESSION =
              new IndTestType("Linear Regression", DataType.Continuous);
      public static final IndTestType CONDITIONAL_CORRELATION =
              new IndTestType("Conditional Correlation Test", DataType.Continuous);
      public static final IndTestType SEM_BIC =
              new IndTestType("SEM BIC used as a Test", DataType.Continuous);
      public static final IndTestType LOGISTIC_REGRESSION =
              new IndTestType("Logistic Regression", DataType.Continuous);
      public static final IndTestType MIXED_MLR =
              new IndTestType("Multinomial Logistic Regression", DataType.Mixed);
      public static final IndTestType FISHER_ZD =
              new IndTestType("Fisher's Z (Deterministic)", DataType.Continuous);
      public static final IndTestType FISHER_Z_BOOTSTRAP =
              new IndTestType("Fisher's Z (Bootstrap)", DataType.Continuous);
      public static final IndTestType G_SQUARE = new IndTestType("G Square", DataType.Discrete);
      public static final IndTestType CHI_SQUARE = new IndTestType("Chi Square", DataType.Discrete);
      public static final IndTestType D_SEPARATION =
              new IndTestType("D-Separation", DataType.Graph);
      public static final IndTestType TIME_SERIES =
              new IndTestType("Time Series", DataType.Continuous);
      public static final IndTestType INDEPENDENCE_FACTS =
              new IndTestType("Independence Facts", DataType.Graph);
      public static final IndTestType POOL_RESIDUALS_FISHER_Z =
              new IndTestType("Fisher Z Pooled Residuals", DataType.Continuous);
      public static final IndTestType FISHER = new IndTestType("Fisher (Fisher Z)", DataType.Continuous);
      public static final IndTestType TIPPETT = new IndTestType("Tippett (Fisher Z)", DataType.Continuous);
      public static final IndTestType MIXED_REGR_LRT = new IndTestType("Mixed Regression Likelihood Ratio Test",
                  DataType.Mixed);
      public static final IndTestType MIXED_CG_LRT
              = new IndTestType("Mixed Conditional Gaussian Likelihood Ratio Test", DataType.Mixed);
  
      /**
       * The name of this dataType.
       */
      private final transient String name;
      private final DataType dataType;
  
      /**
       * Protected constructor for the types; this allows for extension in case anyone wants to add formula types.
       */
      protected IndTestType(String name, DataType type) {
          this.name = name;
          this.dataType = type;
      }
  
      /**
       * Generates a simple exemplar of this class to test serialization.
       */
      public static IndTestType serializableInstance() {
          return IndTestType.DEFAULT;
      }
  
      /**
       * Prints out the name of the dataType.
       */
      public String toString() {
          return name;
      }
  
      // Declarations required for serialization.
      private static int nextOrdinal = 0;
      private final int ordinal = nextOrdinal++;
      private static final IndTestType[] TYPES = {DEFAULT, CORRELATION_T, FISHER_Z,
              LINEAR_REGRESSION, CONDITIONAL_CORRELATION, SEM_BIC, LOGISTIC_REGRESSION,
              MIXED_MLR, FISHER_ZD,
              FISHER_Z_BOOTSTRAP,
              G_SQUARE, CHI_SQUARE,
              D_SEPARATION, TIME_SERIES,
  
              INDEPENDENCE_FACTS, POOL_RESIDUALS_FISHER_Z, FISHER, TIPPETT,
  
      };
  
      Object readResolve() throws ObjectStreamException {
          return TYPES[ordinal]; // Canonicalize.
      }
  
      public DataType getDataType() {
          return dataType;
      }
  }
  
  
  
  
  
  