org.apache.avalon.framework.component

Class DefaultComponentSelector

public class DefaultComponentSelector extends Object implements ComponentSelector

This is the default implementation of the ComponentSelector.

Deprecated: Use DefaultServiceSelector instead.

Version: $Id: DefaultComponentSelector.java 30977 2004-07-30 03:57:54 -0500 (Fri, 30 Jul 2004) niclas $

Author: Avalon Development Team

Field Summary
HashMap	m_components
boolean	m_readOnly

Method Summary
protected void	checkWriteable() Check if this component m_manager is writeable.
protected Map	getComponentMap() Helper method for subclasses to retrieve component map.
boolean	hasComponent(Object hint) Returns whether a Component exists or not
void	makeReadOnly() Make this component selector read-only.
void	put(Object hint, Component component) Populate the ComponentSelector.
void	release(Component component) Release component.
Component	select(Object hint) Select the desired component.

Field Detail

m_components

private final HashMap m_components

m_readOnly

private boolean m_readOnly

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

hasComponent

public boolean hasComponent(Object hint)

Returns whether a Component exists or not

Parameters: hint the hint to retrieve Component

Returns: true if the Component exists

makeReadOnly

public void makeReadOnly()

Make this component selector read-only.

put

public void put(Object hint, Component component)

Populate the ComponentSelector.

Parameters: hint the hint to retrieve Component component the component to add

release

public void release(Component component)

Release component.

Parameters: component the component

select

public Component select(Object hint)

Select the desired component. It does not cascade, neither should it.

Parameters: hint the hint to retrieve Component

Returns: the Component

Throws: ComponentException if an error occurs