1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 * 19 */ 20 21 package org.apache.directory.api.util; 22 23 24 import java.util.Arrays; 25 import java.util.Collections; 26 import java.util.LinkedList; 27 import java.util.List; 28 29 import org.apache.directory.api.i18n.I18n; 30 31 32 /** 33 * Abstract implementation of a components monitor. 34 * 35 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 36 */ 37 public abstract class AbstractSimpleComponentsMonitor implements ComponentsMonitor 38 { 39 40 /** The components. */ 41 private List<String> components; 42 43 44 /** 45 * Instantiates a new abstract simple components monitor. 46 * 47 * @param components the components 48 */ 49 public AbstractSimpleComponentsMonitor( String[] components ) 50 { 51 // register components 52 this.components = new LinkedList<String>( Arrays.asList( components ) ); 53 } 54 55 56 /** 57 * {@inheritDoc} 58 */ 59 public ComponentsMonitor useComponent( String component ) throws IllegalArgumentException 60 { 61 if ( !components.remove( component ) ) 62 { 63 throw new IllegalArgumentException( I18n.err( I18n.ERR_04336, component ) ); 64 } 65 66 return this; 67 } 68 69 70 /** 71 * {@inheritDoc} 72 */ 73 public boolean allComponentsUsed() 74 { 75 return components.isEmpty(); 76 } 77 78 79 /** 80 * {@inheritDoc} 81 */ 82 public List<String> getRemainingComponents() 83 { 84 return Collections.unmodifiableList( components ); 85 } 86 87 }