org.apache.lens.server.api.priority
Class RangeConf<K extends Comparable<K>,V>

java.lang.Object
  org.apache.lens.server.api.priority.RangeConf<K,V>

Type Parameters:

K - Key type. Integer in the grade range example

V - Value Type. String(or a Grade class) in the grade range example

Direct Known Subclasses:

CostToPriorityRangeConf

public abstract class RangeConf<K extends Comparable<K>,V>
extends Object

Class for storing range configurations. An Example would be grading system. The value F,30,D,40,C,60,B,80,A corresponds to a system where - inf < marks <= 30 : F 30 < marks <= 40 : D 40 < marks <= 60 : C 60 < marks <= 80 : B 80 < marks <= + Inf : A

rangeConfInstance.get(marks) would give you the grade depending on the range.

The utility is for easily storing range configs in config xml files.

Implementation is done by storing the least value(floor) and keeping a treemap on rest of values

Method Summary

V	get(K key) Get method.
protected abstract String	getDefaultConf() When null/blank conf string passed, this would be the value from which data structure will be formed
protected abstract K	parseKey(String s) parse key type from its string representation
protected abstract V	parseValue(String s) parse value type from its string representation
String	toString() toString representation

Methods inherited from class java.lang.Object

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

Method Detail

parseKey

protected abstract K parseKey(String s)

parse key type from its string representation

parseValue

protected abstract V parseValue(String s)

parse value type from its string representation

getDefaultConf

protected abstract String getDefaultConf()

When null/blank conf string passed, this would be the value from which data structure will be formed

get

public V get(K key)

Get method.

Parameters:

key -

Returns:

the value depending on which range the key lies in

toString

public String toString()

toString representation

Overrides:

toString in class Object

Returns:

string representation