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Posted to cvs@avalon.apache.org by mc...@apache.org on 2002/11/26 19:05:00 UTC
cvs commit: avalon-sandbox/assembly/src/java/org/apache/avalon/assembly/profile DefaultProfileSelector.java
mcconnell 2002/11/26 10:05:00
Added: assembly/src/java/org/apache/avalon/assembly/profile
DefaultProfileSelector.java
Log:
Implemetation of a default profile selector.
Revision Changes Path
1.1 avalon-sandbox/assembly/src/java/org/apache/avalon/assembly/profile/DefaultProfileSelector.java
Index: DefaultProfileSelector.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 apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
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*
* 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,
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* 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.avalon.assembly.profile;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.meta.info.StageDescriptor;
import org.apache.avalon.meta.info.DependencyDescriptor;
import org.apache.avalon.meta.model.Profile;
import org.apache.avalon.meta.model.Mode;
/**
* Default selector class. The default selector selcts profiles based
* of ranking of profile relative to EXPLICIT, PACKAGED and IMPLICIT
* status. For each category, if a supplied profile matches the category
* the first profile matching the category is returned.
*
* @author <a href="mailto:mcconnell@apache.org">Stephen McConnell</a>
* @version $Revision: 1.1 $ $Date: 2002/11/26 18:05:00 $
*/
class DefaultProfileSelector extends AbstractLogEnabled
implements ProfileSelector
{
/**
* Returns the preferred profile form an available selection of
* candidate profiles.
* @param profiles the set of candidate profiles
* @param dependency the service dependency
* @return the preferred profile or null if no satisfactory provider can be established
*/
public Profile select( Profile[] profiles, DependencyDescriptor dependency )
{
if( profiles.length == 0 )
{
return null;
}
Profile profile = select( profiles, dependency, Mode.EXPLICIT );
if( profile == null )
{
profile = select( profiles, dependency, Mode.PACKAGED );
}
if( profile == null )
{
profile = select( profiles, dependency, Mode.IMPLICIT );
}
if( profile != null )
{
return profile;
}
if( profiles.length > 0 )
{
return profiles[ 0 ];
}
else
{
return null;
}
}
/**
* Returns the preferred profile form an available selection of
* candidate profiles.
* @param profiles the set of candidate profiles
* @param stage the service stage depedency
* @return the prefered profile or null if no satisfactory provider can be established
*/
public Profile select( Profile[] profiles, StageDescriptor stage )
{
if( profiles.length == 0 )
{
return null;
}
Profile profile = select( profiles, stage, Mode.EXPLICIT );
if( profile == null )
{
profile = select( profiles, stage, Mode.PACKAGED );
}
if( profile == null )
{
profile = select( profiles, stage, Mode.IMPLICIT );
}
if( profile != null )
{
return profile;
}
if( profiles.length > 0 )
{
return profiles[ 0 ];
}
else
{
return null;
}
}
/**
* Returns the fist profile that matches the depedency and mode criteria.
* @param profiles a set of candidate profiles
* @param dependency the service dependency
* @param mode the slection mode
* @return the selected profile
*/
private Profile select( Profile[] profiles, DependencyDescriptor dependency, Mode mode )
{
for( int i = 0; i < profiles.length; i++ )
{
Profile profile = profiles[ i ];
if( profile.getType().getService( dependency.getReference() ) != null )
{
if( profile.getMode().equals( mode ))
{
return profile;
}
}
}
return null;
}
/**
* Returns the fist profile that matches the stage and mode criteria.
* @param profiles a set of candidate profiles
* @param dependency the service dependency
* @param mode the slection mode
* @return the selected profile
*/
private Profile select( Profile[] profiles, StageDescriptor stage, Mode mode )
{
for( int i = 0; i < profiles.length; i++ )
{
Profile profile = profiles[ i ];
if( profile.getType().getExtension( stage ) != null )
{
if( profile.getMode().equals( mode ))
{
return profile;
}
}
}
return null;
}
}
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