edu.udo.cs.miningmart.operator
Class AttributeDerivation

java.lang.Object
  edu.udo.cs.miningmart.operator.ExecutableOperator
      edu.udo.cs.miningmart.operator.ConceptOperator
          edu.udo.cs.miningmart.operator.SingleCSOperator
              edu.udo.cs.miningmart.operator.AttributeDerivation

public class AttributeDerivation
extends SingleCSOperator

An operator that uses a Java method programmed by the user to create values of the OutputAttribute.

Version:

$Id: AttributeDerivation.java,v 1.5 2006/09/27 14:59:56 euler Exp $

Author:

Timm Euler

Field Summary

static java.lang.String	externalMethodName
static java.lang.Class[]	externalMethodParameters
static java.lang.String	PARAM_CLASSNAME
static java.lang.String	PARAM_OUTPUT_ATTR
static java.lang.String	PARAM_TARGET_ATTR

Fields inherited from class edu.udo.cs.miningmart.operator.ConceptOperator

suffixForIntermediateViews

Fields inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator

generatedSQLDefinitions

Constructor Summary

AttributeDerivation()

Method Summary

java.lang.String	generateSQLDefinition(java.lang.String selectPart) This method must return the SQL definition of the newly created ColumnSet.
java.lang.String	getTypeOfNewColumnSet() This method must return the entry String for the M4 table "Columnset_t", indicating whether the new Columnset is a view or a table.
protected java.lang.String	handleExtraOutputFeature(Feature outF, Columnset csForOutputConcept) Overwrites the super class method so that the newly constructed Feature can be handled.
protected boolean	mustCopyFeature(java.lang.String nameOfFeature) This method is for operators that do not copy all Features of the input concept to the output concept.

Methods inherited from class edu.udo.cs.miningmart.operator.SingleCSOperator

generateColumnSetsForOp, generateSQLDefinition, getNewCSName, getTypeOfNewColumnSet

Methods inherited from class edu.udo.cs.miningmart.operator.ConceptOperator

compileStatement, createMetadata, createMetadataForOneBA, createSingleColumnSet, createStatement, generateColumns, getInputConcept, getNewCSName, getOutputConcept, getStringForSelection, setNewCSMultiStepBranch

Methods inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator

autoPrint, checkConditions, doPrint, doPrint, execute, executeBusinessSingleValueSqlRead, executeBusinessSingleValueSqlReadL, executeBusinessSqlRead, executeBusinessSqlWrite, executeM4SingleValueSqlRead, executeM4SingleValueSqlReadL, executeM4SqlRead, executeM4SqlWrite, getArtificalColumnName, getBusinessDbms, getHighestLoopNr, getM4Db, getM4Dbms, getM4ObjectFromCache, getName, getNextM4SequenceValue, getNumberOfLoops, getOperator, getOpParamsIterator, getParameter, getParameter, getParameterObjectsOfAllLoops, getSingleParameter, getSingleParameter, getStep, giveWarningForChangedInputData, handleAssertions, isDeselectedParameter, isLoopable, isManual, isStepable, load, print, putM4ObjectToCache, showCreateStatement, storedProceduresAvailable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PARAM_CLASSNAME

public static final java.lang.String PARAM_CLASSNAME

See Also:

Constant Field Values

PARAM_OUTPUT_ATTR

public static final java.lang.String PARAM_OUTPUT_ATTR

See Also:

Constant Field Values

PARAM_TARGET_ATTR

public static final java.lang.String PARAM_TARGET_ATTR

See Also:

Constant Field Values

externalMethodName

public static final java.lang.String externalMethodName

See Also:

Constant Field Values

externalMethodParameters

public static final java.lang.Class[] externalMethodParameters

Constructor Detail

AttributeDerivation

public AttributeDerivation()

Method Detail

getTypeOfNewColumnSet

public java.lang.String getTypeOfNewColumnSet()

Description copied from class: SingleCSOperator

This method must return the entry String for the M4 table "Columnset_t", indicating whether the new Columnset is a view or a table.

Specified by:

getTypeOfNewColumnSet in class SingleCSOperator

Returns:

The type of the new Columnset, either "V" or "T".

See Also:

SingleCSOperator.getTypeOfNewColumnSet()

generateSQLDefinition

public java.lang.String generateSQLDefinition(java.lang.String selectPart)
                                       throws M4CompilerError

Description copied from class: SingleCSOperator

This method must return the SQL definition of the newly created ColumnSet.

Specified by:

generateSQLDefinition in class SingleCSOperator

Parameters:

selectPart - The SQL string between "SELECT" and "FROM" for the SQL definition to be returned.

Returns:

The SQL definition for the new ColumnSet.

Throws:

M4CompilerError

See Also:

SingleCSOperator.generateSQLDefinition(String)

mustCopyFeature

protected boolean mustCopyFeature(java.lang.String nameOfFeature)
                           throws M4CompilerError

Description copied from class: ConceptOperator

This method is for operators that do not copy all Features of the input concept to the output concept.

Specified by:

mustCopyFeature in class ConceptOperator

Parameters:

nameOfFeature - Name of the feature in question.

Returns:

TRUE if this feature should be copied to the output concept, FALSE if not.

Throws:

M4CompilerError

See Also:

ConceptOperator.mustCopyFeature(String)

handleExtraOutputFeature

protected java.lang.String handleExtraOutputFeature(Feature outF,
                                                    Columnset csForOutputConcept)
                                             throws M4CompilerError

Overwrites the super class method so that the newly constructed Feature can be handled.

Overrides:

handleExtraOutputFeature in class SingleCSOperator

Parameters:

outF - Feature to be dealt with

csForOutputConcept - Columnset that was created for the output concept

Returns:

a String with a column definition

Throws:

M4CompilerError