Package weka.core

Class AttributeLocator

java.lang.Object

weka.core.AttributeLocator

All Implemented Interfaces:

Serializable, Comparable<AttributeLocator>, RevisionHandler

Direct Known Subclasses:

RelationalLocator, StringLocator

public class AttributeLocator
extends Object
implements Serializable, Comparable<AttributeLocator>, RevisionHandler

This class locates and records the indices of a certain type of attributes, recursively in case of Relational attributes.

Version:

$Revision$

Author:

fracpete (fracpete at waikato dot ac dot nz)

See Also:

Attribute.RELATIONAL, Serialized Form

Constructor Summary

Constructors

Constructor	Description
AttributeLocator(Instances data, int type)	Initializes the AttributeLocator with the given data for the specified type of attribute.
AttributeLocator(Instances data, int type, int[] indices)	initializes the AttributeLocator with the given data for the specified type of attribute.
AttributeLocator(Instances data, int type, int fromIndex, int toIndex)	Initializes the AttributeLocator with the given data for the specified type of attribute.

Method Summary

Modifier and Type	Method	Description
int	compareTo(AttributeLocator o)	Compares this object with the specified object for order.
boolean	equals(Object o)	Indicates whether some other object is "equal to" this one.
int	getActualIndex(int index)	returns actual index in the Instances object.
int[]	getAllowedIndices()	returns the indices that are allowed to check for the attribute type
int[]	getAttributeIndices()	Returns the indices of the attributes.
Instances	getData()	returns the underlying data
AttributeLocator	getLocator(int index)	Returns the AttributeLocator at the given index.
int[]	getLocatorIndices()	Returns the indices of the AttributeLocator objects.
String	getRevision()	Returns the revision string.
int	getType()	returns the type of attribute that is located
String	toString()	returns a string representation of this object

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AttributeLocator

public AttributeLocator(Instances data,
                        int type)

Initializes the AttributeLocator with the given data for the specified type of attribute. Checks all attributes.

Parameters:

data - the data to work on

type - the type of attribute to locate

AttributeLocator

public AttributeLocator(Instances data,
                        int type,
                        int fromIndex,
                        int toIndex)

Initializes the AttributeLocator with the given data for the specified type of attribute. Checks only the given range.

Parameters:

data - the data to work on

type - the type of attribute to locate

fromIndex - the first index to inspect (including)

toIndex - the last index to check (including)

AttributeLocator

public AttributeLocator(Instances data,
                        int type,
                        int[] indices)

initializes the AttributeLocator with the given data for the specified type of attribute. Checks only the given attribute indices.

Parameters:

data - the data to work on

type - the type of attribute to locate

indices - the attribute indices to check

Method Detail

getType

public int getType()

returns the type of attribute that is located

Returns:

the type of attribute

getAllowedIndices

public int[] getAllowedIndices()

returns the indices that are allowed to check for the attribute type

Returns:

the indices that are checked for the attribute type

getData

public Instances getData()

returns the underlying data

Returns:

the underlying Instances object

getActualIndex

public int getActualIndex(int index)

returns actual index in the Instances object.

Parameters:

index - the index in the m_AllowedIndices array

Returns:

the actual index in the instances object

getAttributeIndices

public int[] getAttributeIndices()

Returns the indices of the attributes. These indices are referring to the m_AllowedIndices array, not the actual indices in the Instances object.

Returns:

the indices of the attributes

See Also:

getActualIndex(int)

getLocatorIndices

public int[] getLocatorIndices()

Returns the indices of the AttributeLocator objects. These indices are referring to the m_AllowedIndices array, not the actual indices in the Instances object.

Returns:

the indices of the AttributeLocator objects

See Also:

getActualIndex(int)

getLocator

public AttributeLocator getLocator(int index)

Returns the AttributeLocator at the given index. This index refers to the index of the m_AllowedIndices array, not the actual Instances object.

Parameters:

index - the index of the locator to retrieve

Returns:

the AttributeLocator at the given index

compareTo

public int compareTo(AttributeLocator o)

Compares this object with the specified object for order. Returns a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object. Only type and indices are checked.

Specified by:

compareTo in interface Comparable<AttributeLocator>

Parameters:

o - the object to compare with

Returns:

-1 if less than, 0 if equal, +1 if greater than the given object

equals

public boolean equals(Object o)

Indicates whether some other object is "equal to" this one. Only type and indices are checked.

Overrides:

equals in class Object

Parameters:

o - the AttributeLocator to check for equality

Returns:

true if the AttributeLocators have the same type and indices

toString

public String toString()

returns a string representation of this object

Overrides:

toString in class Object

Returns:

a string representation

getRevision

public String getRevision()

Returns the revision string.

Specified by:

getRevision in interface RevisionHandler

Returns:

the revision