001/* 002 * IzPack - Copyright 2001-2005 Julien Ponge, All Rights Reserved. 003 * 004 * http://www.izforge.com/izpack/ 005 * http://developer.berlios.de/projects/izpack/ 006 * 007 * Copyright 2003 Tino Schwarze 008 * 009 * Licensed under the Apache License, Version 2.0 (the "License"); 010 * you may not use this file except in compliance with the License. 011 * You may obtain a copy of the License at 012 * 013 * http://www.apache.org/licenses/LICENSE-2.0 014 * 015 * Unless required by applicable law or agreed to in writing, software 016 * distributed under the License is distributed on an "AS IS" BASIS, 017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 018 * See the License for the specific language governing permissions and 019 * limitations under the License. 020 */ 021 022package com.izforge.izpack.util; 023 024import com.izforge.izpack.panels.ProcessingClient; 025import com.izforge.izpack.panels.Validator; 026 027/** 028 * A validator to enforce non-empty fields. 029 * 030 * This validator can be used for rule input fields in the UserInputPanel to make sure that the user 031 * entered something. 032 * 033 * @author tisc 034 */ 035public class NotEmptyValidator implements Validator 036{ 037 038 public boolean validate(ProcessingClient client) 039 { 040 int numfields = client.getNumFields(); 041 042 for (int i = 0; i < numfields; i++) 043 { 044 String value = client.getFieldContents(i); 045 046 if ((value == null) || (value.length() == 0)) return false; 047 } 048 049 return true; 050 } 051 052}