Class WrapperComponentSelector

java.lang.Object
org.apache.avalon.framework.component.WrapperComponentSelector
All Implemented Interfaces:
org.apache.avalon.framework.component.Component, org.apache.avalon.framework.component.ComponentSelector

public class WrapperComponentSelector extends Object implements org.apache.avalon.framework.component.ComponentSelector
This is a ServiceSelector implementation that can wrap around a legacy ComponentSelector object effectively adapting a ComponentSelector interface to a ServiceSelector interface.
Since:
4.1.4
Version:
$Id: WrapperComponentSelector.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 final String
    The role that this selector was aquired via.
    private final org.apache.avalon.framework.service.ServiceSelector
    The Selector we are wrapping.
  • Constructor Summary

    Constructors
    Constructor
    Description
    WrapperComponentSelector(String key, org.apache.avalon.framework.service.ServiceSelector selector)
    This constructor is a constructor for a WrapperComponentSelector.
  • Method Summary

    Modifier and Type
    Method
    Description
    (package private) org.apache.avalon.framework.service.ServiceSelector
    The WrapperComponentManager wraps ServiceSelectors in WrapperServiceSelectors when they are looked up.
    boolean
    Check to see if a Component exists relative to the supplied policy.
    void
    release(org.apache.avalon.framework.component.Component object)
    Return the Object when you are finished with it.
    org.apache.avalon.framework.component.Component
    select(Object policy)
    Select a Component based on a policy.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Field Details

    • m_selector

      private final org.apache.avalon.framework.service.ServiceSelector m_selector
      The Selector we are wrapping.
    • m_key

      private final String m_key
      The role that this selector was aquired via.
  • Constructor Details

    • WrapperComponentSelector

      public WrapperComponentSelector(String key, org.apache.avalon.framework.service.ServiceSelector selector)
      This constructor is a constructor for a WrapperComponentSelector.
      Parameters:
      key - the key used to aquire this selector
      selector - the selector to wrap
  • Method Details

    • select

      public org.apache.avalon.framework.component.Component select(Object policy) throws org.apache.avalon.framework.component.ComponentException
      Select a Component based on a policy.
      Specified by:
      select in interface org.apache.avalon.framework.component.ComponentSelector
      Parameters:
      policy - the policy
      Returns:
      the Component
      Throws:
      org.apache.avalon.framework.component.ComponentException - if unable to select service
    • hasComponent

      public boolean hasComponent(Object policy)
      Check to see if a Component exists relative to the supplied policy.
      Specified by:
      hasComponent in interface org.apache.avalon.framework.component.ComponentSelector
      Parameters:
      policy - a Object containing the selection criteria
      Returns:
      True if the component is available, False if it not.
    • release

      public void release(org.apache.avalon.framework.component.Component object)
      Return the Object when you are finished with it. This allows the ServiceSelector to handle the End-Of-Life Lifecycle events associated with the Object. Please note, that no Exception should be thrown at this point. This is to allow easy use of the ServiceSelector system without having to trap Exceptions on a release.
      Specified by:
      release in interface org.apache.avalon.framework.component.ComponentSelector
      Parameters:
      object - The Object we are releasing.
    • getWrappedSelector

      org.apache.avalon.framework.service.ServiceSelector getWrappedSelector()
      The WrapperComponentManager wraps ServiceSelectors in WrapperServiceSelectors when they are looked up. This method makes it possible to release the original component selector.
      Returns:
      The ServiceSelector being wrapped.