org.artoflife.util
Class Configuration

java.lang.Object
  |
  +--org.artoflife.util.Configuration

public final class Configuration

extends java.lang.Object

Allows access to typed configuration properties. Properties are defined:

1. in custom properties if set with loadConfiguration(java.lang.String)
2. in default.properties resource
3. in System properties

A custom resource name can be specified with loadConfiguration(java.lang.String) although the default "configuration.properties" resource is always loaded from the classpath if it can be found.

This could be replaced with the config stuff in Jakarta Avalon if it gets unwieldy in real life.

Author:

Steve Meyfroidt

Method Summary

char	getChar(java.lang.String key, char defaultValue)
java.lang.Class	getClass(java.lang.String key, java.lang.Class defaultValue)
java.util.List	getClasses(java.lang.String keyPrefix) Of form some.prefix.0=foo, some.prefix.1=bar.
java.util.List	getDoubles(java.lang.String keyPrefix) Of form some.prefix.0=foo, some.prefix.1=bar.
float	getFloat(java.lang.String key, float defaultValue)
static Configuration	getInstance() Singleton.
java.util.SortedMap	getInstancesProbabilities(java.lang.String propertyPrefix) Create a sorted map of probability (Float) against an instance of some class: 0.1 an instance with 10% probability 0.2 a different instance with 10% probability 1.0 an instance with 80% probability The implementation ensures that the final entry always has a probability of exactly 1.0.
int	getInt(java.lang.String key, int defaultValue)
java.lang.String	getString(java.lang.String key, java.lang.String defaultValue)
java.util.List	getStrings(java.lang.String keyPrefix) Of form some.prefix.0=foo, some.prefix.1=bar.
void	loadConfiguration(java.lang.String resourceName)

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static Configuration getInstance()

Singleton.

loadConfiguration

public void loadConfiguration(java.lang.String resourceName)
                       throws java.io.IOException

java.io.IOException

getString

public java.lang.String getString(java.lang.String key,
                                  java.lang.String defaultValue)

getChar

public char getChar(java.lang.String key,
                    char defaultValue)

getClass

public java.lang.Class getClass(java.lang.String key,
                                java.lang.Class defaultValue)

getInt

public int getInt(java.lang.String key,
                  int defaultValue)

getFloat

public float getFloat(java.lang.String key,
                      float defaultValue)

getStrings

public java.util.List getStrings(java.lang.String keyPrefix)

Of form some.prefix.0=foo, some.prefix.1=bar.

Returns:

list of Strings or empty list

getClasses

public java.util.List getClasses(java.lang.String keyPrefix)

Of form some.prefix.0=foo, some.prefix.1=bar.

Returns:

list of Classes or empty list

getDoubles

public java.util.List getDoubles(java.lang.String keyPrefix)

Of form some.prefix.0=foo, some.prefix.1=bar.

Returns:

list of Doubles or empty list

getInstancesProbabilities

public java.util.SortedMap getInstancesProbabilities(java.lang.String propertyPrefix)

Create a sorted map of probability (Float) against an instance of some class:

0.1

an instance with 10% probability

0.2

a different instance with 10% probability

1.0

an instance with 80% probability

The implementation ensures that the final entry always has a probability of exactly 1.0.

Load from configuration properties: [prefix].class.0 and optionally [prefix].probability.0