| /* |
| * @(#) $Id$ |
| * |
| * Copyright 2004 The Apache Software 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. |
| * |
| */ |
| package org.apache.ldap.server.configuration; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.naming.directory.Attributes; |
| |
| /** |
| * A utility class that provides common functionality while validating configuration. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$ |
| */ |
| class ConfigurationUtil |
| { |
| /** |
| * Checks all elements of the specified set is of the specified type, |
| * and returns cloned set. |
| * |
| * @throws ConfigurationException if the specified set has an element of wrong type |
| */ |
| static Set getTypeSafeSet( Set set, Class type ) |
| { |
| Set newSet = new HashSet(); |
| getTypeSafeCollection( set, type, newSet ); |
| return newSet; |
| } |
| |
| /** |
| * Checks all elements of the specified list is of the specified type, |
| * and returns cloned list. |
| * |
| * @throws ConfigurationException if the specified set has an element of wrong type |
| */ |
| static List getTypeSafeList( List list, Class type ) |
| { |
| List newList = new ArrayList(); |
| getTypeSafeCollection( list, type, newList ); |
| return newList; |
| } |
| |
| private static void getTypeSafeCollection( Collection collection, Class type, Collection newCollection ) |
| { |
| Iterator i = collection.iterator(); |
| while( i.hasNext() ) |
| { |
| Object e = i.next(); |
| if( !type.isAssignableFrom( e.getClass() ) ) |
| { |
| throw new ConfigurationException( |
| "Invalid element type: " + e.getClass() + |
| " (expected " + type ); |
| } |
| newCollection.add( e ); |
| } |
| } |
| |
| /** |
| * Returns the clone of the specified set. |
| */ |
| static Set getClonedSet( Set set ) |
| { |
| Set newSet = new HashSet(); |
| newSet.addAll( set ); |
| return newSet; |
| } |
| |
| /** |
| * Returns the clone of the specified list. |
| */ |
| static List getClonedList( List list ) |
| { |
| List newList = new ArrayList(); |
| newList.addAll( list ); |
| return newList; |
| } |
| |
| /** |
| * Returns the deep clone of the specified {@link Attributes} list. |
| */ |
| static List getClonedAttributesList( List list ) |
| { |
| List newList = new ArrayList(); |
| Iterator i = list.iterator(); |
| while( i.hasNext() ) |
| { |
| newList.add( ( ( Attributes ) i.next() ).clone() ); |
| } |
| return newList; |
| } |
| |
| /** |
| * Throws a {@link ConfigurationException} if the specified port number |
| * is out of range. |
| */ |
| static void validatePortNumber( int port ) |
| { |
| if( port < 0 || port > 65535 ) |
| { |
| throw new ConfigurationException( "Invalid port number: " + port ); |
| } |
| } |
| |
| private ConfigurationUtil() |
| { |
| } |
| } |