uk.ac.ed.epcc.webapp.charts.strategy

Class HashLabeller<T,K>

java.lang.Object

uk.ac.ed.epcc.webapp.AbstractContexed

uk.ac.ed.epcc.webapp.charts.strategy.HashLabeller<T,K>

Type Parameters:

T - type of object being mapped

K - type of key object generated

All Implemented Interfaces:

Labelled, Contexed

Direct Known Subclasses:

KeyLabeller

public abstract class HashLabeller<T,K>
extends AbstractContexed
implements Labelled

HashLabeller implemetation class for classes that implement Labelled and builds the label vector and the mappings as data is seen. Sets are ordered according to the order the first data from that set was seen. non String internal label types are supported to allow sorting by label but these are converted to Strings This class is often included by composition rather than directly extended

Field Summary

Fields inherited from class uk.ac.ed.epcc.webapp.AbstractContexed

conn

Constructor Summary

Constructors

Constructor and Description
HashLabeller(AppContext c)

Method Summary

Modifier and Type	Method and Description
abstract K	getKey(T r) Create the Key object from the object being plotted.
abstract java.lang.Object	getLabel(K key, T r) generates the label object we could get this either from the key or the object itself.
java.util.Vector<java.lang.String>	getLabels() What are the labels corresponding to the Sets
int[]	getPerm() Get a permutation array for the sets depending on the natural ordering of the internal label objects.
protected int	getSet(K key, T o)
int	getSet(T o)
int	nSets() How many sets can the mapper map to

Methods inherited from class uk.ac.ed.epcc.webapp.AbstractContexed

getContext, getLogger, resetLogger

Methods inherited from class java.lang.Object

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

Constructor Detail

HashLabeller

public HashLabeller(AppContext c)

Method Detail

getKey

public abstract K getKey(T r)

Create the Key object from the object being plotted. All objects with the same key map to the same plot, different keys may map to the same plot if desired.

Parameters:

r - Plot Object

Returns:

key Object

getLabel

public abstract java.lang.Object getLabel(K key,
                                          T r)

generates the label object we could get this either from the key or the object itself. This will be converted to a string to generate the chart label

Parameters:

key - Key Object

r - Plot Object

Returns:

label Object

getLabels

public final java.util.Vector<java.lang.String> getLabels()

Description copied from interface: Labelled

What are the labels corresponding to the Sets

Specified by:

getLabels in interface Labelled

Returns:

Vector of Strings

getPerm

public int[] getPerm()

Get a permutation array for the sets depending on the natural ordering of the internal label objects.

Returns:

getSet

public final int getSet(T o)

getSet

protected final int getSet(K key,
                           T o)

nSets

public final int nSets()

Description copied from interface: Labelled

How many sets can the mapper map to

Specified by:

nSets in interface Labelled

Returns:

int number of sets