| /******************************************************************************* |
| * Copyright (c) 2010-present Sonatype, Inc. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Stuart McCulloch (Sonatype, Inc.) - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.sisu.plexus; |
| |
| import java.util.Iterator; |
| import java.util.NoSuchElementException; |
| import java.util.Set; |
| |
| import org.codehaus.plexus.classworlds.realm.ClassRealm; |
| import org.eclipse.sisu.BeanEntry; |
| |
| import com.google.inject.name.Named; |
| |
| /** |
| * Sequence of {@link BeanEntry}s filtered according to whether they are visible from the current {@link ClassRealm}. |
| */ |
| final class RealmFilteredBeans<T> |
| implements Iterable<BeanEntry<Named, T>> |
| { |
| // ---------------------------------------------------------------------- |
| // Implementation fields |
| // ---------------------------------------------------------------------- |
| |
| final Iterable<BeanEntry<Named, T>> beans; |
| |
| // ---------------------------------------------------------------------- |
| // Constructors |
| // ---------------------------------------------------------------------- |
| |
| RealmFilteredBeans( final Iterable<BeanEntry<Named, T>> beans ) |
| { |
| this.beans = beans; |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Public methods |
| // ---------------------------------------------------------------------- |
| |
| public Iterator<BeanEntry<Named, T>> iterator() |
| { |
| final Set<String> realmNames = RealmManager.visibleRealmNames( RealmManager.contextRealm() ); |
| if ( null != realmNames && realmNames.size() > 0 ) |
| { |
| return new FilteredItr( realmNames ); |
| } |
| return beans.iterator(); |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Implementation types |
| // ---------------------------------------------------------------------- |
| |
| /** |
| * {@link BeanEntry} iterator that only returns entries visible from the given set of named realms. |
| */ |
| final class FilteredItr |
| implements Iterator<BeanEntry<Named, T>> |
| { |
| // ---------------------------------------------------------------------- |
| // Implementation fields |
| // ---------------------------------------------------------------------- |
| |
| private final Iterator<BeanEntry<Named, T>> itr = beans.iterator(); |
| |
| private final Set<String> realmNames; |
| |
| private BeanEntry<Named, T> nextBean; |
| |
| // ---------------------------------------------------------------------- |
| // Constructors |
| // ---------------------------------------------------------------------- |
| |
| public FilteredItr( final Set<String> realmNames ) |
| { |
| this.realmNames = realmNames; |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Public methods |
| // ---------------------------------------------------------------------- |
| |
| public boolean hasNext() |
| { |
| if ( null != nextBean ) |
| { |
| return true; |
| } |
| while ( itr.hasNext() ) |
| { |
| nextBean = itr.next(); |
| final String source = String.valueOf( nextBean.getSource() ); |
| if ( !source.startsWith( "ClassRealm" ) || realmNames.contains( source ) ) |
| { |
| return true; |
| } |
| } |
| nextBean = null; |
| return false; |
| } |
| |
| public BeanEntry<Named, T> next() |
| { |
| if ( hasNext() ) |
| { |
| // populated by hasNext() |
| final BeanEntry<Named, T> bean = nextBean; |
| nextBean = null; |
| return bean; |
| } |
| throw new NoSuchElementException(); |
| } |
| |
| public void remove() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| } |
| } |