org.apache.avalon.fortress.impl.role
Class AbstractMetaInfoManager

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.avalon.fortress.impl.role.AbstractMetaInfoManager

All Implemented Interfaces:

org.apache.avalon.fortress.MetaInfoManager, org.apache.avalon.framework.logger.LogEnabled

Direct Known Subclasses:

ECMMetaInfoManager, ServiceMetaManager

public abstract class AbstractMetaInfoManager
extends org.apache.avalon.framework.logger.AbstractLogEnabled
implements org.apache.avalon.fortress.MetaInfoManager

Provides the foundation for MetaInfoManagers.

Version:

CVS $Revision: 1.9 $

Author:

Avalon Development Team

Field Summary

private java.util.Map	m_classnames Map for classname to MetaInfoEntry.
private java.lang.ClassLoader	m_loader The classloader used to load and check roles and components.
private org.apache.avalon.fortress.MetaInfoManager	m_parent Parent MetaInfoManager for nested resolution.
private java.util.Map	m_shorthands Map for shorthand to MetaInfoEntry.

Fields inherited from interface org.apache.avalon.fortress.MetaInfoManager

ROLE

Constructor Summary

AbstractMetaInfoManager()
Default constructor--this RoleManager has no parent.

AbstractMetaInfoManager(org.apache.avalon.fortress.MetaInfoManager parent)
Create a MetaInfoManager with a parent manager.

AbstractMetaInfoManager(org.apache.avalon.fortress.MetaInfoManager parent, java.lang.ClassLoader loader)
Alternate constructor--this RoleManager has the specified parent.

AbstractMetaInfoManager(org.apache.avalon.fortress.RoleManager parent)
Create a MetaInfoManager with a parent manager.

Method Summary

protected void	addComponent(java.lang.String role, java.lang.String className, java.util.Properties meta, java.util.List deps) Addition of a component to the meta info manager.
protected java.lang.ClassLoader	getLoader() Get the classloader used for the RoleManager for any class that extends this one.
org.apache.avalon.fortress.MetaInfoEntry	getMetaInfoForClassname(java.lang.String classname) Get a MetaInfoEntry for a component type.
org.apache.avalon.fortress.MetaInfoEntry	getMetaInfoForShortName(java.lang.String shortname) Return the meta info relative to a supplied short name.
protected boolean	isAlreadyAdded(java.lang.String className) Let us know that the meta and dependency info has already been loaded for a given class name.

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Field Detail

m_loader

private final java.lang.ClassLoader m_loader

The classloader used to load and check roles and components.

m_shorthands

private final java.util.Map m_shorthands

Map for shorthand to MetaInfoEntry.

m_classnames

private final java.util.Map m_classnames

Map for classname to MetaInfoEntry.

m_parent

private final org.apache.avalon.fortress.MetaInfoManager m_parent

Parent MetaInfoManager for nested resolution.

Constructor Detail

AbstractMetaInfoManager

public AbstractMetaInfoManager()

Default constructor--this RoleManager has no parent.

AbstractMetaInfoManager

public AbstractMetaInfoManager(org.apache.avalon.fortress.RoleManager parent)

Create a MetaInfoManager with a parent manager.

Parameters:

parent - The parent RoleManager.

AbstractMetaInfoManager

public AbstractMetaInfoManager(org.apache.avalon.fortress.MetaInfoManager parent)

Create a MetaInfoManager with a parent manager.

Parameters:

parent - The parent MetaInfoManager.

AbstractMetaInfoManager

public AbstractMetaInfoManager(org.apache.avalon.fortress.MetaInfoManager parent,
                               java.lang.ClassLoader loader)

Alternate constructor--this RoleManager has the specified parent.

Parameters:

parent - The parent MetaInfoManager

loader - The class loader

Method Detail

addComponent

protected void addComponent(java.lang.String role,
                            java.lang.String className,
                            java.util.Properties meta,
                            java.util.List deps)

Addition of a component to the meta info manager.

Parameters:

role - the role associated with the component

className - the class name

meta - the properties object for the meta info

getMetaInfoForClassname

public org.apache.avalon.fortress.MetaInfoEntry getMetaInfoForClassname(java.lang.String classname)

Get a MetaInfoEntry for a component type. This facilitates self-healing configuration files where the impl reads the configuration and translates all <component/> entries to use the short hand name for readability.

Specified by:

getMetaInfoForClassname in interface org.apache.avalon.fortress.MetaInfoManager

Parameters:

classname - The component type name

Returns:

the proper MetaInfoEntry

getMetaInfoForShortName

public org.apache.avalon.fortress.MetaInfoEntry getMetaInfoForShortName(java.lang.String shortname)

Return the meta info relative to a supplied short name.

Specified by:

getMetaInfoForShortName in interface org.apache.avalon.fortress.MetaInfoManager

Parameters:

shortname - the short name

Returns:

the proper MetaInfoEntry

getLoader

protected java.lang.ClassLoader getLoader()

Get the classloader used for the RoleManager for any class that extends this one.

Returns:

ClassLoader

isAlreadyAdded

protected boolean isAlreadyAdded(java.lang.String className)

Let us know that the meta and dependency info has already been loaded for a given class name.

Parameters:

className - The name of the class to check

Returns:

true if it has been added