| /* |
| 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.wiki.auth.acl; |
| |
| import org.apache.wiki.api.core.AclEntry; |
| |
| import java.io.Serializable; |
| import java.security.Permission; |
| import java.security.Principal; |
| import java.util.Enumeration; |
| import java.util.Vector; |
| |
| |
| /** |
| * JSPWiki implementation of an Access Control List. |
| * |
| * @since 2.3 |
| */ |
| public class AclImpl implements Acl, Serializable { |
| |
| private static final long serialVersionUID = 1L; |
| private final Vector< AclEntry > m_entries = new Vector<>(); |
| |
| /** |
| * Constructs a new AclImpl instance. |
| */ |
| public AclImpl() { |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Principal[] findPrincipals( final Permission permission ) { |
| final Vector< Principal > principals = new Vector<>(); |
| final Enumeration< AclEntry > entries = aclEntries(); |
| while( entries.hasMoreElements() ) { |
| final AclEntry entry = entries.nextElement(); |
| final Enumeration< Permission > permissions = entry.permissions(); |
| while( permissions.hasMoreElements() ) { |
| final Permission perm = permissions.nextElement(); |
| if( perm.implies( permission ) ) { |
| principals.add( entry.getPrincipal() ); |
| } |
| } |
| } |
| return principals.toArray( new Principal[ principals.size() ] ); |
| } |
| |
| private boolean hasEntry( final AclEntry entry ) { |
| if( entry == null ) { |
| return false; |
| } |
| |
| for( final AclEntry e : m_entries ) { |
| final Principal ep = e.getPrincipal(); |
| final Principal entryp = entry.getPrincipal(); |
| |
| if( ep == null || entryp == null ) { |
| throw new IllegalArgumentException( "Entry is null; check code, please (entry=" + entry + "; e=" + e + ")" ); |
| } |
| |
| if( ep.getName().equals( entryp.getName() ) ) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public synchronized boolean addEntry( final AclEntry entry ) { |
| if( entry.getPrincipal() == null ) { |
| throw new IllegalArgumentException( "Entry principal cannot be null" ); |
| } |
| |
| if( hasEntry( entry ) ) { |
| return false; |
| } |
| |
| m_entries.add( entry ); |
| |
| return true; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public synchronized boolean removeEntry( final AclEntry entry ) { |
| return m_entries.remove( entry ); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Enumeration< AclEntry > aclEntries() { |
| return m_entries.elements(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public AclEntry getAclEntry( final Principal principal ) { |
| for( final AclEntry entry : m_entries ) { |
| if( entry.getPrincipal().getName().equals( principal.getName() ) ) { |
| return entry; |
| } |
| } |
| |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean isEmpty() { |
| return m_entries.isEmpty(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String toString() { |
| final StringBuilder sb = new StringBuilder(); |
| for( final AclEntry entry : m_entries ) { |
| final Principal pal = entry.getPrincipal(); |
| if( pal != null ) { |
| sb.append( " user = " ).append( pal.getName() ).append( ": " ); |
| } else { |
| sb.append( " user = null: " ); |
| } |
| sb.append( "(" ); |
| for( final Enumeration< Permission > perms = entry.permissions(); perms.hasMoreElements(); ) { |
| final Permission perm = perms.nextElement(); |
| sb.append( perm.toString() ); |
| } |
| sb.append( ")\n" ); |
| } |
| return sb.toString(); |
| } |
| |
| } |
| |