001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020 021package org.apache.directory.api.util; 022 023 024import java.util.Arrays; 025import java.util.Collections; 026import java.util.LinkedList; 027import java.util.List; 028 029import org.apache.directory.api.i18n.I18n; 030 031 032/** 033 * Abstract implementation of a components monitor. 034 * 035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 036 */ 037public abstract class AbstractSimpleComponentsMonitor implements ComponentsMonitor 038{ 039 040 /** The components. */ 041 private List<String> components; 042 043 044 /** 045 * Instantiates a new abstract simple components monitor. 046 * 047 * @param components the components 048 */ 049 public AbstractSimpleComponentsMonitor( String[] components ) 050 { 051 // register components 052 this.components = new LinkedList<String>( Arrays.asList( components ) ); 053 } 054 055 056 /** 057 * {@inheritDoc} 058 */ 059 public ComponentsMonitor useComponent( String component ) 060 { 061 if ( !components.remove( component ) ) 062 { 063 throw new IllegalArgumentException( I18n.err( I18n.ERR_04336, component ) ); 064 } 065 066 return this; 067 } 068 069 070 /** 071 * {@inheritDoc} 072 */ 073 public boolean allComponentsUsed() 074 { 075 return components.isEmpty(); 076 } 077 078 079 /** 080 * {@inheritDoc} 081 */ 082 public List<String> getRemainingComponents() 083 { 084 return Collections.unmodifiableList( components ); 085 } 086 087}