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## edu.udo.cs.miningmart.operator
Class AssignDefault

    java.lang.Object
      edu.udo.cs.miningmart.operator.ExecutableOperator
          edu.udo.cs.miningmart.operator.FeatureConstruction
              edu.udo.cs.miningmart.operator.MissingValues
                  edu.udo.cs.miningmart.operator.AssignDefault

public class AssignDefault
extends MissingValues

This operator replaces the missing values with a default value which is specified with the parameter DefaultValue.

Version:
  $Id: AssignDefault.java,v 1.5 2006/04/11 14:10:11 euler Exp $
Author:
  Timm Euler

Constructor Summary
`AssignDefault()`

Method Summary
`java.lang.String` | `generateValueForOp(Column columnWithMissingValues)` The abstract method to be implemented by the subclasses.
`Value` | `getDefaultValue()` Gives the default value that this operator will use to replace missing values in the current loop.

Methods inherited from class edu.udo.cs.miningmart.operator.MissingValues
`generateSQL`

Methods inherited from class edu.udo.cs.miningmart.operator.FeatureConstruction
`compileStatement, createStatement, estimateStatistics, execute, generateColumnForOp, getCurrentLoopNumber, getTheInputConcept, getTheOutputAttribute, getTheOutputAttribute, getTheTargetAttribute, getTheTargetAttribute, load, writeResults`

Methods inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator
`autoPrint, checkConditions, doPrint, doPrint, executeBusinessSingleValueSqlRead, executeBusinessSingleValueSqlReadL, executeBusinessSqlRead, executeBusinessSqlWrite, executeM4SingleValueSqlRead, executeM4SingleValueSqlReadL, executeM4SqlRead, executeM4SqlWrite, getArtificalColumnName, getBusinessDbms, getHighestLoopNr, getM4Db, getM4Dbms, getM4ObjectFromCache, getName, getNextM4SequenceValue, getNumberOfLoops, getOperator, getOpParamsIterator, getParameter, getParameter, getSingleParameter, getSingleParameter, getStep, handleAssertions, isDeselectedParameter, isLoopable, isManual, isStepable, print, putM4ObjectToCache, showCreateStatement, storedProceduresAvailable`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### AssignDefault

    public AssignDefault()

Method Detail

### getDefaultValue

    public Value getDefaultValue()
                          throws M4CompilerError

  Gives the default value that this operator will use to replace missing values in the current loop.

  Returns:
    the default value for the current loop
  Throws:
    `M4CompilerError`

### generateValueForOp

    public java.lang.String generateValueForOp(Column columnWithMissingValues)
                                        throws M4CompilerError

  Description copied from class: `MissingValues`
  The abstract method to be implemented by the subclasses.

  Specified by:
    `generateValueForOp` in class `MissingValues`
  Parameters:
    `columnWithMissingValues` - The Column which has some missing values.
  Returns:
    A String with an SQL definition which is used to replace the missing values of the given column. It must include quotes if necessary.
  Throws:
    `M4CompilerError` - A simple exception object with an error message.
  See Also:
    `miningmart.operator.MissingValues#generateValueForOp(Column)`

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