rowdatametadata.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 Michael Thess
  * @version 1.2
  */

package com.prudsys.pdm.Olap.Cursor;

import javax.olap.OLAPException;

/**
 * Row meta data base class.
 */
public class RowDataMetaData extends com.prudsys.pdm.Olap.Query.Core.NamedObject
  implements javax.olap.cursor.RowDataMetaData
{
  /** Number of columns. */
  private int columnCount = 0;

  /** Types of columns. 0 - numeric, 1 - categorical. */
  private int[] columnTypes;

  /** Names of columns. */
  private String[] columnNames;

  /**
   * Empty constructor.
   */
  public RowDataMetaData() {
  }

  /**
   * New Row metadata from given column data.
   *
   * @param columnCount number of columns
   * @param columnNames names of columns
   * @param columnTypes types of columns (0 - numeric, 1 - categorical)
   */
  public RowDataMetaData(int columnCount, String[] columnNames, int[] columnTypes) {

    this.columnCount = columnCount;
    this.columnNames = columnNames;
    this.columnTypes = columnTypes;
  }

  public int getColumnCount() throws OLAPException {

    return columnCount;
  }
  public boolean isCaseSensitive( int arg0) throws OLAPException {

    return true;
  }

  public boolean isCurrency( int arg0) throws OLAPException {

    return false;
  }

  public int isNullable( int arg0) throws OLAPException {

    return java.sql.ResultSetMetaData.columnNullable;
  }

  public boolean isSigned( int arg0) throws OLAPException {

    if (columnTypes[arg0-1] == 0)
      return true;
    else
      return false;
  }

  public int getColumnDisplaySize( int arg0) throws OLAPException {
          throw new UnsupportedOperationException();
  }

  public String getColumnLabel( int arg0) throws OLAPException {
          throw new UnsupportedOperationException();
  }

  public String getColumnName( int arg0) throws OLAPException {

    return columnNames[arg0-1];
  }

  public int getPrecision( int arg0) throws OLAPException{
          throw new UnsupportedOperationException();
  }

  public int getScale( int arg0) throws OLAPException{
          throw new UnsupportedOperationException();
  }

  public int getColumnType( int arg0) throws OLAPException {

    if (columnTypes[arg0-1] == 0)
      return java.sql.Types.DOUBLE;
    else
      return java.sql.Types.VARCHAR;
  }

  public String getColumnTypeName( int arg0) throws OLAPException{
          throw new UnsupportedOperationException();
  }

  public String getColumnClassName( int arg0) throws OLAPException{
          throw new UnsupportedOperationException();
  }
}