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}