Package org.apache.avalon.framework.component

Class DefaultComponentSelector

java.lang.Object

org.apache.avalon.framework.component.DefaultComponentSelector

All Implemented Interfaces:

org.apache.avalon.framework.component.Component, org.apache.avalon.framework.component.ComponentSelector

public class DefaultComponentSelector
extends java.lang.Object
implements org.apache.avalon.framework.component.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

Fields

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

Constructor Summary

Constructors

Constructor	Description
DefaultComponentSelector()

Method Summary

Modifier and Type	Method	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, org.apache.avalon.framework.component.Component component)	Populate the ComponentSelector.
void	release(org.apache.avalon.framework.component.Component component)	Release component.
org.apache.avalon.framework.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 org.apache.avalon.framework.component.Component select(java.lang.Object hint)
                                                       throws org.apache.avalon.framework.component.ComponentException

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

Specified by:

select in interface org.apache.avalon.framework.component.ComponentSelector

Parameters:

hint - the hint to retrieve Component

Returns:

the Component

Throws:

org.apache.avalon.framework.component.ComponentException - if an error occurs

hasComponent

public boolean hasComponent(java.lang.Object hint)

Returns whether a Component exists or not

Specified by:

hasComponent in interface org.apache.avalon.framework.component.ComponentSelector

Parameters:

hint - the hint to retrieve Component

Returns:

true if the Component exists

release

public void release(org.apache.avalon.framework.component.Component component)

Release component.

Specified by:

release in interface org.apache.avalon.framework.component.ComponentSelector

Parameters:

component - the component

put

public void put(java.lang.Object hint,
                org.apache.avalon.framework.component.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