donaldp 2002/07/13 22:08:26
Added: extension/src/java/org/apache/avalon/excalibur/extension
DelegatingPackageRepository.java
Log:
Add in a simple delegating package repository
Revision Changes Path
1.1
jakarta-avalon-excalibur/extension/src/java/org/apache/avalon/excalibur/extension/DelegatingPackageRepository.java
Index: DelegatingPackageRepository.java
===================================================================
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE.txt file.
*/
package org.apache.avalon.excalibur.extension;
import java.util.ArrayList;
/**
* A {@link PackageRepository} that can delegate to multiple
* different package repositories.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Peter Donald</a>
* @version $Revision: 1.1 $ $Date: 2002/07/14 05:08:25 $
*/
public class DelegatingPackageRepository
implements PackageRepository
{
/**
* The list containing the package repositories.
*/
private final ArrayList m_repositories = new ArrayList();
/**
* Default constructor that does not add any repositories.
*/
public DelegatingPackageRepository()
{
}
/**
* Default constructor that delegates to specified repositories.
*/
public DelegatingPackageRepository( final PackageRepository[] repositories )
{
for( int i = 0; i < repositories.length; i++ )
{
addPackageRepository( repositories[ i ] );
}
}
/**
* Add a repository to list of repositories delegated to
* to find Optional Packages.
*
* @param repository the repository to add
*/
protected synchronized void addPackageRepository( final PackageRepository
repository )
{
if( !m_repositories.contains( repository ) )
{
m_repositories.add( repository );
}
}
/**
* Remove a repository from list of repositories delegated to
* to find Optional Packages.
*
* @param repository the repository to remove
*/
protected synchronized void removePackageRepository( final PackageRepository
repository )
{
m_repositories.remove( repository );
}
/**
* Scan through list of respositories and return all the matching {@link
OptionalPackage}
* objects that match in any repository.
*
* @param extension the extension to search for
* @return the matching {@link OptionalPackage} objects.
*/
public synchronized OptionalPackage[] getOptionalPackages( final Extension
extension )
{
final ArrayList resultPackages = new ArrayList();
final int size = m_repositories.size();
for( int i = 0; i < size; i++ )
{
final PackageRepository repository =
(PackageRepository)m_repositories.get( i );
final OptionalPackage[] packages =
repository.getOptionalPackages( extension );
if( null == packages || 0 == packages.length )
{
continue;
}
for( int j = 0; j < packages.length; j++ )
{
resultPackages.add( packages[ j ] );
}
}
final OptionalPackage[] resultData =
new OptionalPackage[ resultPackages.size() ];
return (OptionalPackage[])resultPackages.toArray( resultData );
}
}
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