mcconnell 2002/11/19 04:26:59
Added: assembly/src/java/org/apache/excalibur/assembly/appliance
ApplianceSelector.java
Log:
Interface implemented by a service selection implementation mechanism. Classes
implementing the selector interface may be activated during the selection of candidate
service providers during assembly. A component author may declare a selection class
explicitly via a service dependency attribute with the attribute name of
<code>avalon:appliance.selector</code>.
Revision Changes Path
1.1
jakarta-avalon-excalibur/assembly/src/java/org/apache/excalibur/assembly/appliance/ApplianceSelector.java
Index: ApplianceSelector.java
===================================================================
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments
* normally appear.
*
* 4. The names "Jakarta", "Avalon", and "Apache Software Foundation"
* must not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.excalibur.assembly.appliance;
import org.apache.excalibur.meta.info.StageDescriptor;
import org.apache.excalibur.meta.info.DependencyDescriptor;
import org.apache.excalibur.assembly.profile.ProfileSelector;
/**
* Interface implemented by a service selection implementation mechanism. Classes
* implementing the selector interface may be activated during the selection of
* candidate service providers during assembly. A component author may declare a
* selection class explicitly via a service dependency attribute with the attribute
* name of <code>avalon:appliance.selector</code>.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Stephen McConnell</a>
* @version $Revision: 1.1 $ $Date: 2002/11/19 12:26:59 $
*/
public interface ApplianceSelector extends ProfileSelector
{
/**
* Returns the preferred appliance form an available selection of
* candidate service providers.
* @param appliances the set of candidate appliance instances
* @return the preferred provider or null if no satisfactory provider can be
established
* from the supplied appliance set.
*/
Appliance select( Appliance[] appliances, DependencyDescriptor dependency );
/**
* Returns the preferred appliance form an available selection of candidate
* extension providers
* @return the preferred provider or null if no satisfactory provider can be
established
* from the supplied appliance set.
*/
Appliance select( Appliance[] appliances, StageDescriptor stage );
}
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