edu.udo.cs.miningmart.m4.core
Class EstimatedStatistics

java.lang.Object
  edu.udo.cs.miningmart.m4.core.EstimatedStatistics

All Implemented Interfaces:

EstimatedStatistics

public class EstimatedStatistics
extends java.lang.Object
implements EstimatedStatistics

Author:

Timm Euler

See Also:

EstimatedStatistics

Field Summary

Fields inherited from interface edu.udo.cs.miningmart.m4.EstimatedStatistics

VALUE_DISCRETE_UNKNOWN, VALUE_DOUBLE_UNKNOWN, VALUE_INT_UNKNOWN

Constructor Summary

EstimatedStatistics(Concept theConcept)
This constructor creates an EstimatedStatistics object for the given Concept.

Method Summary

void	addAttribute(java.lang.String nameOfAttribute)
void	addValueInformation(java.lang.String nameOfAttribute, java.lang.String value, int noOfOccurrences)
EstimatedStatistics	copy(Concept toConcept)
void	copyValueList(java.lang.String nameOfDestinationAttribute, EstimatedStatistics from, java.lang.String nameOfSourceAttribute) Copy the list of values (with their number of occurrences) of the attribute with name nameOfSourceAttributefrom the given EstimatedStatistics object to this object, to the attribute with name nameOfDestinationAttribute.
double	getBiggestValue(java.lang.String nameOfAttribute)
Concept	getConcept() Returns the concept this EstimatedStatistics object applies to.
double	getLowestValue(java.lang.String nameOfAttribute)
int	getNumberOfMissingValues(java.lang.String nameOfAttribute)
int	getNumberOfOccurrences(java.lang.String nameOfAttribute, java.lang.String value)
long	getNumberOfRows()
java.util.Vector	getValueList(java.lang.String nameOfAttribute) Returns a Vector with the values this attribute takes.
boolean	readAvailableStatisticsFromDb() If the concept that these ES belong to is of type MINING, it may happen that some statistics have been computed for the columnset that may be attached to it.
void	removeValue(java.lang.String value, java.lang.String nameOfAttribute) Removes the given value from the list of values of the given attribute.
void	setBiggestValue(java.lang.String nameOfAttribute, double value)
void	setLowestValue(java.lang.String nameOfAttribute, double value)
void	setNumberOfMissingValues(java.lang.String nameOfAttribute, int number)
void	setNumberOfOccurrences(java.lang.String nameOfAttribute, java.lang.String value, int number)
void	setNumberOfRows(long numberOfRows)
void	setValueList(java.lang.String nameOfAttribute, java.util.Vector theValues) Sets the list of occurring values of the given attribute.

Methods inherited from class java.lang.Object

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

Constructor Detail

EstimatedStatistics

public EstimatedStatistics(Concept theConcept)
                    throws M4Exception

This constructor creates an EstimatedStatistics object for the given Concept. If the concept is of type DB then its actual statistics are computed and copied to the estimated values. Otherwise all estimated values are set to be unknown. This means that any inference or estimation has to be done elsewhere.

Throws:

M4Exception

Method Detail

getConcept

public Concept getConcept()

Returns the concept this EstimatedStatistics object applies to.

Specified by:

getConcept in interface EstimatedStatistics

getValueList

public java.util.Vector getValueList(java.lang.String nameOfAttribute)

Description copied from interface: EstimatedStatistics

Returns a Vector with the values this attribute takes.

Specified by:

getValueList in interface EstimatedStatistics

Returns:

See Also:

EstimatedStatistics.getValueList(String)

setValueList

public void setValueList(java.lang.String nameOfAttribute,
                         java.util.Vector theValues)

Description copied from interface: EstimatedStatistics

Sets the list of occurring values of the given attribute. The given vector must contain Strings with the values.

Specified by:

setValueList in interface EstimatedStatistics

theValues - a Vector with Strings

copyValueList

public void copyValueList(java.lang.String nameOfDestinationAttribute,
                          EstimatedStatistics from,
                          java.lang.String nameOfSourceAttribute)

Description copied from interface: EstimatedStatistics

Copy the list of values (with their number of occurrences) of the attribute with name nameOfSourceAttributefrom the given EstimatedStatistics object to this object, to the attribute with name nameOfDestinationAttribute.

Specified by:

copyValueList in interface EstimatedStatistics

Parameters:

nameOfDestinationAttribute - name of attribute to which to set the copied list

from - the given EstimatedStatistics object

nameOfSourceAttribute - name of attribute from which to copy

removeValue

public void removeValue(java.lang.String value,
                        java.lang.String nameOfAttribute)

Description copied from interface: EstimatedStatistics

Removes the given value from the list of values of the given attribute.

Specified by:

removeValue in interface EstimatedStatistics

See Also:

EstimatedStatistics.removeValue(String, String)

getNumberOfMissingValues

public int getNumberOfMissingValues(java.lang.String nameOfAttribute)

Specified by:

getNumberOfMissingValues in interface EstimatedStatistics

See Also:

EstimatedStatistics.getNumberOfMissingValues(String)

setNumberOfMissingValues

public void setNumberOfMissingValues(java.lang.String nameOfAttribute,
                                     int number)

Specified by:

setNumberOfMissingValues in interface EstimatedStatistics

See Also:

EstimatedStatistics.setNumberOfMissingValues(String, int)

getBiggestValue

public double getBiggestValue(java.lang.String nameOfAttribute)

Specified by:

getBiggestValue in interface EstimatedStatistics

See Also:

EstimatedStatistics.getBiggestValue(String)

setBiggestValue

public void setBiggestValue(java.lang.String nameOfAttribute,
                            double value)

Specified by:

setBiggestValue in interface EstimatedStatistics

See Also:

EstimatedStatistics.setBiggestValue(String, double)

setLowestValue

public void setLowestValue(java.lang.String nameOfAttribute,
                           double value)

Specified by:

setLowestValue in interface EstimatedStatistics

See Also:

EstimatedStatistics.setLowestValue(String, double)

getLowestValue

public double getLowestValue(java.lang.String nameOfAttribute)

Specified by:

getLowestValue in interface EstimatedStatistics

See Also:

EstimatedStatistics.getLowestValue(String)

readAvailableStatisticsFromDb

public boolean readAvailableStatisticsFromDb()
                                      throws M4Exception

Description copied from interface: EstimatedStatistics

If the concept that these ES belong to is of type MINING, it may happen that some statistics have been computed for the columnset that may be attached to it. If such statistics are stored in the M4 schema they can be used as the estimations with this method.

Specified by:

readAvailableStatisticsFromDb in interface EstimatedStatistics

Returns:

TRUE iff any estimations were updated with information from M4.

Throws:

M4Exception

See Also:

EstimatedStatistics.readAvailableStatisticsFromDb()

getNumberOfRows

public long getNumberOfRows()

Specified by:

getNumberOfRows in interface EstimatedStatistics

See Also:

EstimatedStatistics.getNumberOfRows()

setNumberOfRows

public void setNumberOfRows(long numberOfRows)

Specified by:

setNumberOfRows in interface EstimatedStatistics

See Also:

edu.udo.cs.miningmart.m4.EstimatedStatistics#setNumberOfRows(int)

setNumberOfOccurrences

public void setNumberOfOccurrences(java.lang.String nameOfAttribute,
                                   java.lang.String value,
                                   int number)

Specified by:

setNumberOfOccurrences in interface EstimatedStatistics

getNumberOfOccurrences

public int getNumberOfOccurrences(java.lang.String nameOfAttribute,
                                  java.lang.String value)

Specified by:

getNumberOfOccurrences in interface EstimatedStatistics

copy

public EstimatedStatistics copy(Concept toConcept)
                         throws M4Exception

Specified by:

copy in interface EstimatedStatistics

Throws:

M4Exception

addValueInformation

public void addValueInformation(java.lang.String nameOfAttribute,
                                java.lang.String value,
                                int noOfOccurrences)

Specified by:

addValueInformation in interface EstimatedStatistics

addAttribute

public void addAttribute(java.lang.String nameOfAttribute)

Specified by:

addAttribute in interface EstimatedStatistics