weka.classifiers.rules
Class DecisionTableHashKey

java.lang.Object
  extended by weka.classifiers.rules.DecisionTableHashKey
All Implemented Interfaces:
java.io.Serializable, RevisionHandler

public class DecisionTableHashKey
extends java.lang.Object
implements java.io.Serializable, RevisionHandler

Class providing hash table keys for DecisionTable

See Also:
Serialized Form

Constructor Summary
DecisionTableHashKey(double[] t)
          Constructor for a hashKey
DecisionTableHashKey(Instance t, int numAtts, boolean ignoreClass)
          Constructor for a hashKey
 
Method Summary
 boolean equals(java.lang.Object b)
          Tests if two instances are equal
 java.lang.String getRevision()
          Returns the revision string.
 int hashCode()
          Calculates a hash code
 void print_hash_code()
          Prints the hash code
 java.lang.String toString(Instances t, int maxColWidth)
          Convert a hash entry to a string
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DecisionTableHashKey

public DecisionTableHashKey(Instance t,
                            int numAtts,
                            boolean ignoreClass)
                     throws java.lang.Exception
Constructor for a hashKey

Parameters:
t - an instance from which to generate a key
numAtts - the number of attributes
ignoreClass - if true treat the class as a normal attribute
Throws:
java.lang.Exception - if something goes wrong

DecisionTableHashKey

public DecisionTableHashKey(double[] t)
Constructor for a hashKey

Parameters:
t - an array of feature values
Method Detail

toString

public java.lang.String toString(Instances t,
                                 int maxColWidth)
Convert a hash entry to a string

Parameters:
t - the set of instances
maxColWidth - width to make the fields
Returns:
string representation of the hash entry

hashCode

public int hashCode()
Calculates a hash code

Overrides:
hashCode in class java.lang.Object
Returns:
the hash code as an integer

equals

public boolean equals(java.lang.Object b)
Tests if two instances are equal

Overrides:
equals in class java.lang.Object
Parameters:
b - a key to compare with
Returns:
true if both objects are equal

print_hash_code

public void print_hash_code()
Prints the hash code


getRevision

public java.lang.String getRevision()
Returns the revision string.

Specified by:
getRevision in interface RevisionHandler
Returns:
the revision