edu.udo.cs.miningmart.operator
Class ReversePivotize

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.ReversePivotize

public class ReversePivotize
extends SingleCSOperator

This operator folds some given attributes into one, which is called Reverse Pivotizing. Each of the given attributes represents a combination of "index values"; in the output, each such combination is represented as a row, using as many index attributes as there are types of index values. The row takes the value of the given attributes it corresponds to. For example (input left, output right): Date | RainDuringDay | RainDuringNight Date | TimeOfDay | Rain -----|---------------|---------------- -----|-----------|----- 01-01| 44 | 35 01-01| Day | 44 02-01| 36 | 32 01-01| Night | 35 02-01| Day | 36 02-01| Night | 32

Version:

$Id: ReversePivotize.java,v 1.6 2006/09/27 14:59:56 euler Exp $

Author:

Timm Euler

Field Summary

static java.lang.String	PARAMETER_KEY_ATTR
static java.lang.String	PARAMETER_NAME_PIVOT
static java.lang.String	PARAMETER_NAMES_INDEX_ATTRS
static java.lang.String	PARAMETER_PIVOT_ATTRS
static java.lang.String	PARAMETER_VALUES

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

suffixForIntermediateViews

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

generatedSQLDefinitions

Constructor Summary

ReversePivotize()

Method Summary

protected java.lang.String	generateColumns(Columnset csForOutputConcept) This method is overridden because this operator creates a special output.
java.lang.String	generateSQLDefinition(java.lang.String selectPart) This method must return the SQL definition of the newly created ColumnSet.
static java.lang.String	getConDataTypeOfIndexAttr(java.lang.String nameOfIndexAttr, java.lang.String[] indexValues, java.lang.String[] indexAttrNames)
static java.lang.String	getConDataTypeOfPivotAttr(BaseAttribute[] pivotAttrs)
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 never called.

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

Field Detail

PARAMETER_PIVOT_ATTRS

public static final java.lang.String PARAMETER_PIVOT_ATTRS

See Also:

Constant Field Values

PARAMETER_VALUES

public static final java.lang.String PARAMETER_VALUES

See Also:

Constant Field Values

PARAMETER_KEY_ATTR

public static final java.lang.String PARAMETER_KEY_ATTR

See Also:

Constant Field Values

PARAMETER_NAME_PIVOT

public static final java.lang.String PARAMETER_NAME_PIVOT

See Also:

Constant Field Values

PARAMETER_NAMES_INDEX_ATTRS

public static final java.lang.String PARAMETER_NAMES_INDEX_ATTRS

See Also:

Constant Field Values

Constructor Detail

ReversePivotize

public ReversePivotize()

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:

SingleCSOperator.generateSQLDefinition(String)

generateColumns

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

This method is overridden because this operator creates a special output.

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:

edu.udo.cs.miningmart.m4.operator.ConceptOperator#generateColumns(Columnset)

mustCopyFeature

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

This method is never called.

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)

getConDataTypeOfPivotAttr

public static java.lang.String getConDataTypeOfPivotAttr(BaseAttribute[] pivotAttrs)
                                                  throws M4Exception

Throws:

M4Exception

getConDataTypeOfIndexAttr

public static java.lang.String getConDataTypeOfIndexAttr(java.lang.String nameOfIndexAttr,
                                                         java.lang.String[] indexValues,
                                                         java.lang.String[] indexAttrNames)
                                                  throws M4Exception

Throws:

M4Exception