net.jini.config
Class EmptyConfiguration

java.lang.Object
  net.jini.config.AbstractConfiguration
      net.jini.config.EmptyConfiguration

All Implemented Interfaces:

Configuration

public class EmptyConfiguration
extends AbstractConfiguration

A Configuration with no entries. Applications can use an instance of this class to simplify handling cases where no configuration is specified rather than, for example, checking for a null configuration.

Since:

2.0

Author:

Sun Microsystems, Inc.

Nested Class Summary

Nested classes/interfaces inherited from class net.jini.config.AbstractConfiguration

AbstractConfiguration.Primitive

Field Summary

static EmptyConfiguration

INSTANCE A Configuration with no entries.

Fields inherited from interface net.jini.config.Configuration

NO_DATA, NO_DEFAULT

Method Summary

protected Object

getEntryInternal(String component, String name, Class type, Object data) Always throws an exception -- this configuration contains no entries.

Methods inherited from class net.jini.config.AbstractConfiguration

getEntry, getEntry, getEntry, validIdentifier, validQualifiedIdentifier

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final EmptyConfiguration INSTANCE

A Configuration with no entries.

Method Detail

getEntryInternal

protected Object getEntryInternal(String component,
                                  String name,
                                  Class type,
                                  Object data)
                           throws NoSuchEntryException

Always throws an exception -- this configuration contains no entries.

Specified by:

getEntryInternal in class AbstractConfiguration

Parameters:

component - the component being configured

name - the name of the entry for the component

type - the type of object requested

data - an object to use when computing the value of the entry, or Configuration.NO_DATA to specify no data

Returns:

an object created using the information in the entry matching component and name, and using the value of data (unless it is NO_DATA)

Throws:

NullPointerException - if component, name, or type is null

NoSuchEntryException - unless component, name, or type is null

See Also:

Configuration.getEntry