IdentifiableContainerBase.java revision 608:7e06bf1dcb09
1/* 2 * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package com.sun.corba.se.spi.ior; 27 28import java.util.List; 29import java.util.ArrayList; 30import java.util.Iterator; 31 32import com.sun.corba.se.impl.ior.FreezableList ; 33 34import com.sun.corba.se.spi.ior.TaggedComponent ; 35import com.sun.corba.se.spi.ior.Identifiable ; 36 37/** Convenience class for defining objects that contain lists of Identifiables. 38 * Mainly implements iteratorById. Also note that the constructor creates the 39 * list, which here is always an ArrayList, as this is much more efficient overall 40 * for short lists. 41 * @author Ken Cavanaugh 42 */ 43public class IdentifiableContainerBase extends FreezableList 44{ 45 /** Create this class with an empty list of identifiables. 46 * The current implementation uses an ArrayList. 47 */ 48 public IdentifiableContainerBase() 49 { 50 super( new ArrayList() ) ; 51 } 52 53 /** Return an iterator which iterates over all contained Identifiables 54 * with type given by id. 55 */ 56 public Iterator iteratorById( final int id) 57 { 58 return new Iterator() { 59 Iterator iter = IdentifiableContainerBase.this.iterator() ; 60 Object current = advance() ; 61 62 private Object advance() 63 { 64 while (iter.hasNext()) { 65 Identifiable ide = (Identifiable)(iter.next()) ; 66 if (ide.getId() == id) 67 return ide ; 68 } 69 70 return null ; 71 } 72 73 public boolean hasNext() 74 { 75 return current != null ; 76 } 77 78 public Object next() 79 { 80 Object result = current ; 81 current = advance() ; 82 return result ; 83 } 84 85 public void remove() 86 { 87 iter.remove() ; 88 } 89 } ; 90 } 91} 92