org.codehaus.plexus.ClassRealmUtil Maven / Gradle / Ivy
package org.codehaus.plexus;
/*
* Copyright 2001-2009 Codehaus Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Set;
import org.codehaus.plexus.classworlds.ClassWorld;
import org.codehaus.plexus.classworlds.realm.ClassRealm;
public class ClassRealmUtil
{
public static Set getContextRealms( ClassWorld world )
{
Set realms = new LinkedHashSet();
for ( ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); classLoader != null; classLoader =
classLoader.getParent() )
{
if ( classLoader instanceof ClassRealm )
{
realms.add( (ClassRealm) classLoader );
Queue queue = new LinkedList();
queue.add( (ClassRealm) classLoader );
while ( !queue.isEmpty() )
{
ClassRealm realm = queue.remove();
Collection importRealms = realm.getImportRealms();
for ( ClassRealm importRealm : importRealms )
{
if ( realms.add( importRealm ) )
{
queue.add( importRealm );
}
}
ClassRealm parentRealm = realm.getParentRealm();
if ( parentRealm != null && realms.add( parentRealm ) )
{
queue.add( parentRealm );
}
}
}
}
if ( world != null )
{
for ( Iterator it = realms.iterator(); it.hasNext(); )
{
ClassRealm realm = it.next();
if ( realm.getWorld() != world )
{
it.remove();
}
}
}
return realms;
}
}