| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| package org.apache.jackrabbit.oak.spi.security.authentication.external.impl.principal; |
| |
| import org.apache.jackrabbit.api.security.user.Group; |
| import org.apache.jackrabbit.commons.iterator.AbstractLazyIterator; |
| import org.apache.jackrabbit.oak.spi.security.principal.EveryonePrincipal; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.jcr.RepositoryException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| |
| class InheritedMembershipIterator extends AbstractLazyIterator<Group> { |
| |
| private static final Logger log = LoggerFactory.getLogger(InheritedMembershipIterator.class); |
| |
| private final Iterator<Group> groupIterator; |
| private final List<Iterator<Group>> inherited = new ArrayList<>(); |
| private final Set<String> processed = new HashSet<>(); |
| private Iterator<Group> inheritedIterator = null; |
| |
| InheritedMembershipIterator(@NotNull Iterator<Group> groupIterator) { |
| this.groupIterator = groupIterator; |
| } |
| |
| @Nullable |
| @Override |
| protected Group getNext() { |
| if (groupIterator.hasNext()) { |
| Group gr = groupIterator.next(); |
| try { |
| // call 'memberof' to cover nested inheritance |
| Iterator<Group> it = gr.memberOf(); |
| if (it.hasNext()) { |
| inherited.add(it); |
| } |
| } catch (RepositoryException e) { |
| log.error("Failed to retrieve membership of group {}", gr, e); |
| } |
| return gr; |
| } |
| |
| if (inheritedIterator == null) { |
| inheritedIterator = getNextInheritedIterator(); |
| } |
| |
| while (inheritedIterator.hasNext()) { |
| Group gr = inheritedIterator.next(); |
| if (notProcessedBefore(gr)) { |
| return gr; |
| } |
| if (!inheritedIterator.hasNext()) { |
| inheritedIterator = getNextInheritedIterator(); |
| } |
| } |
| |
| // all inherited groups have been processed |
| return null; |
| } |
| |
| private boolean notProcessedBefore(@NotNull Group group) { |
| try { |
| return processed.add(group.getID()) && !EveryonePrincipal.NAME.equals(group.getPrincipal().getName()); |
| } catch (RepositoryException repositoryException) { |
| return true; |
| } |
| } |
| |
| @NotNull |
| private Iterator<Group> getNextInheritedIterator() { |
| if (inherited.isEmpty()) { |
| // no more inherited groups to retrieve |
| return Collections.emptyIterator(); |
| } else { |
| // no need to verify if the inherited iterator has any elements as this has been asserted before |
| // adding it to the list. |
| return inherited.remove(0); |
| } |
| } |
| } |