edu.udo.cs.miningmart.operator
Class FeatureConstructionWithTFIDF

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.FeatureConstructionWithTFIDF

public class FeatureConstructionWithTFIDF
extends SingleCSOperator

Version:

$Id: FeatureConstructionWithTFIDF.java,v 1.7 2006/09/27 14:59:56 euler Exp $

Author:

Hanna Koepcke

Field Summary

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

suffixForIntermediateViews

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

generatedSQLDefinitions

Constructor Summary

FeatureConstructionWithTFIDF()

Method Summary

protected Column	createM4Column(BaseAttribute outputBA, Columnset newCS, java.lang.String newColumnName) Method to create new M4 column objects.
protected java.lang.String	generateColumns(Columnset csForOutputConcept) This method overrides the method in ConceptOperator.
java.lang.String	generateSQLDefinition(java.lang.String selectPart) This method must return the SQL definition of the newly created ColumnSet.
BaseAttribute	getTheKey() Parameter getter.
protected Feature[]	getTheSelectedAttributes() Getter method for the parameter "TheSelectedAttributes".
BaseAttribute	getTheTimeStamp() Parameter getter.
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 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, handleExtraOutputFeature

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

compileStatement, createMetadata, createMetadataForOneBA, createSingleColumnSet, createStatement, 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

Constructor Detail

FeatureConstructionWithTFIDF

public FeatureConstructionWithTFIDF()

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:

miningmart.compiler.operator.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:

miningmart.compiler.operator.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:

miningmart.compiler.operator.ConceptOperator#mustCopyFeature(String)

generateColumns

protected java.lang.String generateColumns(Columnset csForOutputConcept)
                                    throws M4CompilerError

This method overrides the method in ConceptOperator.

Overrides:

generateColumns in class ConceptOperator

Parameters:

csForOutputConcept - The ColumnSet for which Columns are to be produced.

Returns:

A String for the "SELECT"-part of the view definition for the given ColumnSet.

Throws:

M4CompilerError

See Also:

miningmart.operator.ConceptOperator#generateColumns(Columnset)

createM4Column

protected Column createM4Column(BaseAttribute outputBA,
                                Columnset newCS,
                                java.lang.String newColumnName)
                         throws M4CompilerError,
                                M4Exception

Method to create new M4 column objects.

Parameters:

outputBA - the base attribute of the output concept the new column should belong to

newCS - the new ColumnSet created by the operator

newColumnName - the name of the new column

Returns:

the new Column

Throws:

M4CompilerError

M4Exception

getTheSelectedAttributes

protected Feature[] getTheSelectedAttributes()
                                      throws M4CompilerError

Getter method for the parameter "TheSelectedAttributes". This parameter specifies the set of features for which TFIDF should be computed.

Returns:

an array of Feature objects

Throws:

M4CompilerError

getTheTimeStamp

public BaseAttribute getTheTimeStamp()
                              throws M4CompilerError

Parameter getter.

Throws:

M4CompilerError

getTheKey

public BaseAttribute getTheKey()
                        throws M4CompilerError

Parameter getter.

Throws:

M4CompilerError