org.apache.avalon.framework.component

Class DefaultComponentManager

public class DefaultComponentManager extends Object implements ComponentManager

This class is a static implementation of a ComponentManager. Allow ineritance and extension so you can generate a tree of ComponentManager each defining Component scope.

Deprecated: Use DefaultServiceManager instead.

Version: CVS $Revision: 1.24 $ $Date: 2003/02/11 15:58:38 $

Author: Avalon Development Team

Constructor Summary
	DefaultComponentManager() Construct ComponentManager with no parent.
	DefaultComponentManager(ComponentManager parent) Construct ComponentManager with specified parent.

Method Summary
protected void	checkWriteable() Check if this component m_manager is writeable.
protected Map	getComponentMap() Helper method for subclasses to retrieve component map.
protected ComponentManager	getParent() Helper method for subclasses to retrieve parent.
boolean	hasComponent(String key) Returns `true` if the component m_manager is managing a component with the specified key, `false` otherwise.
Component	lookup(String key) Retrieve Component by key from ComponentManager.
void	makeReadOnly() Make this component m_manager read only.
void	put(String key, Component component) Place Component into ComponentManager.
void	release(Component component) Release component.
String	toString() Build a human readable representation of ComponentManager.

Constructor Detail

DefaultComponentManager

public DefaultComponentManager()

Construct ComponentManager with no parent.

DefaultComponentManager

public DefaultComponentManager(ComponentManager parent)

Construct ComponentManager with specified parent.

Parameters: parent the ComponentManagers parent

Method Detail

checkWriteable

protected final void checkWriteable()

Check if this component m_manager is writeable.

Throws: IllegalStateException if this component m_manager is read-only

getComponentMap

protected final Map getComponentMap()

Helper method for subclasses to retrieve component map.

Returns: the component map

getParent

protected final ComponentManager getParent()

Helper method for subclasses to retrieve parent.

Returns: the parent ComponentManager

hasComponent

public boolean hasComponent(String key)

Returns true if the component m_manager is managing a component with the specified key, false otherwise.

Parameters: key key of the component you are lokking for

Returns: true if the component m_manager has a component with that key

lookup

public Component lookup(String key)

Retrieve Component by key from ComponentManager.

Parameters: key the key

Returns: the Component

Throws: ComponentException if an error occurs

makeReadOnly

public void makeReadOnly()

Make this component m_manager read only.

put

public void put(String key, Component component)

Place Component into ComponentManager.

Parameters: key the components key component the component

release

public void release(Component component)

Release component.

Parameters: component the component

toString

public String toString()

Build a human readable representation of ComponentManager.

Returns: the description of ComponentManager