[DISCUSS] default ordinals for PropertySources

[Reinhard Sandtner]

Hey folks,

i’m currently implementing the standard PropertySources for 
SystemPropertySource and EnvironmentPropertySource.
to have a simple handling with the default ordinals i've added an interface 
with constants for the default ordinals.

the default ordinals are currently taken from deltaspike but the values should 
be discussed.

i've also added a TAMAYA_ORDINAL constant to PropertySource which can be 
specified in every PropertySource to override the default ordinal. The value of 
TAMAYA_ORDINAL is currently tamaya.ordinal but i think this should be discussed 
also.

i’ll upload my patch to the created JIRA issue - pls review it and let me know 
what i can do better ;-)

lg
reini

/**
 * This interface defines the default ordinals for the 'standard'
 * {@link org.apache.tamaya.spi.PropertySource}s
 *
 * DefaultOrdinals can be overwritten via {@link 
org.apache.tamaya.spi.PropertySource#TAMAYA_ORDINAL}
 */
public interface DefaultOrdinal {

    /**
     * default ordinal for {@link 
org.apache.tamaya.core.propertysource.BasePropertySource} if
     * not overriden in each class
     */
    static final int PROPERTY_SOURCE = 1000;

    /**
     * default ordinal for {@link 
org.apache.tamaya.core.propertysource.SystemPropertySource}
     */
    static final int SYSTEM_PROPERTIES = 400;

    /**
     * default ordinal for {@link 
org.apache.tamaya.core.propertysource.EnvironmentPropertySource}
     */
    static final int ENVIRONMENT_PROPERTIES = 300;

}