org.makumba.list.engine
Class Grouper

java.lang.Object
  java.util.Dictionary<K,V>
      java.util.Hashtable
          org.makumba.list.engine.Grouper

All Implemented Interfaces:

Serializable, Cloneable, Map

public class Grouper
extends Hashtable

This class groups data coming in an Enumeration of Dictionaries. Grouping is done in more levels, each level is defined by a set of keys of the dictionary. Elements of each group come in a Vector that is guaranteed to respect the order in the original enumeration.

Author:

Cristian Bogdan

See Also:

Serialized Form

Field Summary

(package private) Vector<Vector<Integer>>	keyNameSets
(package private) MultipleKey[]	keyStack
(package private) int	max
(package private) Hashtable[]	stack

Constructor Summary

Grouper(Vector<Vector<Integer>> keyNameSets, Enumeration e)
Groups the given data according to the given key sets.

Method Summary

Vector	getData(Vector keyData) Gets the Vector associated with the given keysets.
protected MultipleKey	getKey(int n, Object[] data) Get the bunch of values associated with the keyset with the given index

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, put, putAll, rehash, remove, size, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

keyNameSets

Vector<Vector<Integer>> keyNameSets

max

int max

stack

Hashtable[] stack

keyStack

MultipleKey[] keyStack

Constructor Detail

Grouper

public Grouper(Vector<Vector<Integer>> keyNameSets,
               Enumeration e)

Groups the given data according to the given key sets.

Parameters:

keyNameSets - a Vector of Vectors of Strings that represents key names

e - the Enumeration of dictionaries containing the data

Method Detail

getData

public Vector getData(Vector keyData)

Gets the Vector associated with the given keysets. The returned data is deleted from the Grouper.

Parameters:

keyData - a Vector of Dictionaries representing a set of key values each

Returns:

A Vector associated with the given keysets

getKey

protected MultipleKey getKey(int n,
                             Object[] data)

Get the bunch of values associated with the keyset with the given index

Parameters:

n - the index

data - an object array containing the interesting data

Returns:

A MultipleKey holding the values