1 /* 2 * $Source: /usr/cvsroot/melati/maven-dsd-plugin/src/main/java/org/melati/poem/prepro/SizeFieldQualifier.java,v $ 3 * $Revision: 1.13 $ 4 * 5 * Copyright (C) 2000 William Chesters 6 * 7 * Part of Melati (http://melati.org), a framework for the rapid 8 * development of clean, maintainable web applications. 9 * 10 * Melati is free software; Permission is granted to copy, distribute 11 * and/or modify this software under the terms either: 12 * 13 * a) the GNU General Public License as published by the Free Software 14 * Foundation; either version 2 of the License, or (at your option) 15 * any later version, 16 * 17 * or 18 * 19 * b) any version of the Melati Software License, as published 20 * at http://melati.org 21 * 22 * You should have received a copy of the GNU General Public License and 23 * the Melati Software License along with this program; 24 * if not, write to the Free Software Foundation, Inc., 25 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the 26 * GNU General Public License and visit http://melati.org to obtain the 27 * Melati Software License. 28 * 29 * Feel free to contact the Developers of Melati (http://melati.org), 30 * if you would like to work out a different arrangement than the options 31 * outlined here. It is our intention to allow Melati to be used by as 32 * wide an audience as possible. 33 * 34 * This program is distributed in the hope that it will be useful, 35 * but WITHOUT ANY WARRANTY; without even the implied warranty of 36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 37 * GNU General Public License for more details. 38 * 39 * Contact details for copyright holder: 40 * 41 * William Chesters <williamc At paneris.org> 42 * http://paneris.org/~williamc 43 * Obrechtstraat 114, 2517VX Den Haag, The Netherlands 44 */ 45 46 package org.melati.poem.prepro; 47 48 import java.io.StreamTokenizer; 49 import java.io.IOException; 50 51 /** 52 * A <tt>FieldQualifier</TT> which enables the size of 53 * strings to be specified. 54 */ 55 public class SizeFieldQualifier extends FieldQualifier { 56 57 private int size; 58 59 /** 60 * Constructor. 61 * 62 * @param tokens the <code>StreamTokenizer</code> to get tokens from 63 * 64 * @throws ParsingDSDException if an unexpected token is encountered 65 * @throws IOException if something goes wrong with the file system 66 */ 67 public SizeFieldQualifier(StreamTokenizer tokens) 68 throws ParsingDSDException, IOException { 69 DSD.expect(tokens, '='); 70 tokens.nextToken(); 71 if (tokens.ttype == StreamTokenizer.TT_WORD && 72 tokens.sval.equals("unlimited")) 73 size = -1; 74 else { 75 if (tokens.ttype != StreamTokenizer.TT_NUMBER || (int)tokens.nval <= 0) 76 throw new ParsingDSDException("<positive size number>", tokens); 77 size = (int)tokens.nval; 78 } 79 tokens.nextToken(); 80 } 81 82 /** 83 * Update the model. 84 * 85 * @param field the {@link FieldDef} to update 86 * 87 * @throws SizeApplicationException if the field is a non-sizable field 88 */ 89 public void apply(FieldDef field) throws SizeApplicationException { 90 if (field instanceof StringFieldDef) 91 ((StringFieldDef)field).setSize(size); 92 else if (field instanceof BinaryFieldDef) 93 ((BinaryFieldDef)field).setSize(size); 94 else 95 throw new SizeApplicationException(field); 96 } 97 }