org.apache.avalon.framework.component

Class DefaultComponentSelector

java.lang.Object

org.apache.avalon.framework.component.DefaultComponentSelector

public class DefaultComponentSelector
extends java.lang.Object

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

Fields

Modifier and Type	Field and Description
private java.util.HashMap	m_components
private boolean	m_readOnly

Constructor Summary

Constructors

Constructor and Description
DefaultComponentSelector()

Method Summary

Methods

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

Methods inherited from class java.lang.Object

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

Field Detail

m_components

private final java.util.HashMap m_components

m_readOnly

private boolean m_readOnly

Constructor Detail

DefaultComponentSelector

public DefaultComponentSelector()

Method Detail

select

public Component select(java.lang.Object hint)
                 throws ComponentException

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

hasComponent

public boolean hasComponent(java.lang.Object hint)

Returns whether a Component exists or not

Parameters:

hint - the hint to retrieve Component

Returns:

true if the Component exists

release

public void release(Component component)

Release component.

Parameters:

component - the component

put

public void put(java.lang.Object hint,
       Component component)

Populate the ComponentSelector.

Parameters:

hint - the hint to retrieve Component

component - the component to add

getComponentMap

protected final java.util.Map getComponentMap()

Helper method for subclasses to retrieve component map.

Returns:

the component map

makeReadOnly

public void makeReadOnly()

Make this component selector read-only.

checkWriteable

protected final void checkWriteable()
                             throws java.lang.IllegalStateException

Check if this component m_manager is writeable.

Throws:

java.lang.IllegalStateException - if this component m_manager is read-only