org.microbean.configuration.spi

Class SystemPropertiesConfiguration

java.lang.Object

org.microbean.configuration.spi.AbstractConfiguration

org.microbean.configuration.spi.SystemPropertiesConfiguration

All Implemented Interfaces:

Serializable, Configuration, Ranked

public final class SystemPropertiesConfiguration
extends AbstractConfiguration
implements Ranked, Serializable

An AbstractConfiguration that houses System properties and hence, by definition, minimally specific ConfigurationValues representing them.

Author:

Laird Nelson

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SystemPropertiesConfiguration() Creates a new SystemPropertiesConfiguration.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other)
Set<String>	getNames() Returns a Set of the names of all ConfigurationValues that might be returned by this Configuration.
int	getRank()
ConfigurationValue	getValue(Map<String,String> coordinates, String name) Returns a ConfigurationValue representing the System property identified by the supplied name, or null.
int	hashCode()
protected boolean	isAuthoritative(String name) Returns true if the supplied name is not null and is one of the System properties guaranteed by the Java Language Specification to exist on every available Java platform.
String	toString()

Methods inherited from class org.microbean.configuration.spi.AbstractConfiguration

getConfigurations, setConfigurations

Methods inherited from class java.lang.Object

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

Constructor Detail

SystemPropertiesConfiguration

public SystemPropertiesConfiguration()

Creates a new SystemPropertiesConfiguration.

Method Detail

getRank

public final int getRank()

Specified by:

getRank in interface Ranked

getValue

public final ConfigurationValue getValue(Map<String,String> coordinates,
                                         String name)

Returns a ConfigurationValue representing the System property identified by the supplied name, or null.

The ConfigurationValue returned will be marked as authoritative if it is one of the System properties guaranteed by the Java Language Specification to exist on every available Java platform.

Specified by:

getValue in interface Configuration

Parameters:

coordinates - the configuration coordinates in effect for the current request; may be null

name - the name of the configuration property for which to return a ConfigurationValue; may be null

Returns:

a ConfigurationValue, or null

See Also:

ConfigurationValue

getNames

public final Set<String> getNames()

Returns a Set of the names of all ConfigurationValues that might be returned by this Configuration.

This method never returns null.

Overrides of this method must not return null.

This implementation returns an immutable representation of the equivalent of System.getProperties().stringPropertyNames().

Specified by:

getNames in interface Configuration

Returns:

a non-null Set of names

isAuthoritative

protected boolean isAuthoritative(String name)

Returns true if the supplied name is not null and is one of the System properties guaranteed by the Java Language Specification to exist on every available Java platform.

Parameters:

name - the name of a System property; may be null in which case false will be returned

Returns:

true if any value that this SystemPropertiesConfiguration produces for the supplied name is to be regarded as the authoritative value; false otherwise

hashCode

public final int hashCode()

Overrides:

hashCode in class Object

equals

public final boolean equals(Object other)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object