dataitem.java

一个数据挖掘软件ALPHAMINERR的整个过程的JAVA版源代码

/*
 *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/**
 * Title: XELOPES Data Mining Library
 * Description: The XELOPES library is an open platform-independent and data-source-independent library for Embedded Data Mining.
 * Copyright: Copyright (c) 2002 Prudential Systems Software GmbH
 * Company: ZSoft (www.zsoft.ru), Prudsys (www.prudsys.com)
 * @author Valentine Stepanenko ([e-mail])
 * @version 1.0
 */

package com.prudsys.pdm.Cwm.DMSII;

import com.prudsys.pdm.Cwm.Record.*;
import com.prudsys.pdm.Cwm.Expressions.*;
import com.prudsys.pdm.Cwm.Core.*;

/**
 * Instances of DataItem represent the individual data fields within a DataSet.
 * The Group class in the CWM Foundation?s DataTypes package is also available for
 * constructing collections of fields in a DataSet.
 *
 *
 *
 * The interpretation of the contents of some attributes of a DataItem instance
 * are dependent upon the DataItem?s type. For example, the size attribute
 * represents the maximum number of characters in ALPHA and KANJI items, the
 * number of digits of
 *
 * precision in a NUMERIC or REAL items, and the number of bits in a FIELD item.
 * Refer to the definition of individual attributes for specifics.
 */
public class DataItem extends Field
{

   /**
    * Identifies a value of a data item that is treated as representing a null value.
    */
   public ExpressionNode nullValue;

   /**
    * If True, the data item must have a value when the corresponding Dataset record
    * is stored.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isRequired;

   /**
    * Contains the declared size of a data type. The precise meaning of the attribute
    * depends on the type of the DMS II data type being declared.
    */
   public com.prudsys.pdm.Cwm.Core.Integer size;

   /**
    * Contains the <scale factor> value for DMS II data types.
    */
   public com.prudsys.pdm.Cwm.Core.Integer scaleFactor;

   /**
    * Contains the state of the signed indication ("S") for REAL and NUMERIC data
    * types. Not relevant for other data types.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isSigned;

   /**
    * Indicates the number of times the data item occurs in the DataSet record. The
    * occurs attribute is optional, existing only for data items that have an OCCURS
    * clause in their definition.
    */
   public com.prudsys.pdm.Cwm.Core.Integer occurs;

   /**
    * If True, the DataItem instance is calculated when accessed using the expression
    * stored in the virtualExpression attribute.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isVirtual;

   /**
    * The expression used to calculate the value of a virtual DataItem.
    */
   public ExpressionNode virtualExpression;

   /**
    * True if the USAGE=KANJI clause was used. Otherwise USAGE=EBCDIC is assumed.
    * Relevant only for ALPHA data items.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isKanji;

   /**
    * Identifies the CCSVersion specification of a data item.
    */
   public com.prudsys.pdm.Cwm.Core.String ccsVersion;

   /**
    * If True, the DataItem instance was defined with the GEMCOS LITERAL clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isGemcosLiteral;

   /**
    * If True, the DataItem instance was defined with the GEMCOS DATA clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isGemcosData;

   /**
    * If True, the DataItem instance was defined with the GEMCOS SSN clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isGemcosSSN;

   /**
    * If True, the DataItem instance was defined with the GEMCOS DBSN clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isGemcosDBSN;

   /**
    * If True, the DataItem instance was defined with the COMS PROGRAM clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isComsProgram;

   /**
    * If True, the DataItem instance was defined with the COMS ID clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isComsID;

   /**
    * If True, the DataItem instance was defined with the COMS LOCATOR clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isComsLocator;

   /**
    * If True, the DataItem instance was defined with the COMS OUTPQ clause.
    */
   public com.prudsys.pdm.Cwm.Core.Boolean isComsOutpQ;
   public DataItem occuringDataItem[];
   public DataItem occursDataItem;
   public Set keyDataSet[];
   public FieldBit fieldBit[];
   public RemapItem remapItem[];
   public StructuralFeature structure;

   public DataItem()
   {

   }
}