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1: /* 2: * OverviewIterator.java 3: * Copyright (C) 2002 The Free Software Foundation 4: * 5: * This file is part of GNU inetlib, a library. 6: * 7: * GNU inetlib is free software; you can redistribute it and/or modify 8: * it under the terms of the GNU General Public License as published by 9: * the Free Software Foundation; either version 2 of the License, or 10: * (at your option) any later version. 11: * 12: * GNU inetlib is distributed in the hope that it will be useful, 13: * but WITHOUT ANY WARRANTY; without even the implied warranty of 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15: * GNU General Public License for more details. 16: * 17: * You should have received a copy of the GNU General Public License 18: * along with this library; if not, write to the Free Software 19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20: * 21: * Linking this library statically or dynamically with other modules is 22: * making a combined work based on this library. Thus, the terms and 23: * conditions of the GNU General Public License cover the whole 24: * combination. 25: * 26: * As a special exception, the copyright holders of this library give you 27: * permission to link this library with independent modules to produce an 28: * executable, regardless of the license terms of these independent 29: * modules, and to copy and distribute the resulting executable under 30: * terms of your choice, provided that you also meet, for each linked 31: * independent module, the terms and conditions of the license of that 32: * module. An independent module is a module which is not derived from 33: * or based on this library. If you modify this library, you may extend 34: * this exception to your version of the library, but you are not 35: * obliged to do so. If you do not wish to do so, delete this 36: * exception statement from your version. 37: */ 38: 39: package gnu.inet.nntp; 40: 41: import java.io.IOException; 42: import java.util.NoSuchElementException; 43: 44: /** 45: * An iterator over an overview listing. 46: * 47: * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 48: */ 49: public class OverviewIterator 50: extends LineIterator 51: { 52: 53: OverviewIterator(NNTPConnection connection) 54: { 55: super(connection); 56: } 57: 58: /** 59: * Returns the next overview entry. 60: */ 61: public Object next() 62: { 63: try 64: { 65: return nextOverview(); 66: } 67: catch (IOException e) 68: { 69: throw new NoSuchElementException("I/O error: " + e.getMessage()); 70: } 71: } 72: 73: /** 74: * Returns the next overview entry. 75: */ 76: public Overview nextOverview() 77: throws IOException 78: { 79: String line = nextLine(); 80: 81: // Parse line 82: int start = 0, end; 83: end = line.indexOf('\t', start); 84: int articleNumber = Integer.parseInt(line.substring(start, end)); 85: start = end + 1; 86: Overview overview = new Overview(articleNumber); 87: end = line.indexOf('\t', start); 88: while(end > -1) 89: { 90: String entry = line.substring(start, end); 91: overview.add(entry); 92: start = end + 1; 93: end = line.indexOf('\t', start); 94: } 95: String entry = line.substring(start); 96: overview.add(entry); 97: 98: return overview; 99: } 100: 101: }