001/* 002 * This library is part of OpenCms - 003 * the Open Source Content Management System 004 * 005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com) 006 * 007 * This library is free software; you can redistribute it and/or 008 * modify it under the terms of the GNU Lesser General Public 009 * License as published by the Free Software Foundation; either 010 * version 2.1 of the License, or (at your option) any later version. 011 * 012 * This library is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * For further information about Alkacon Software, please see the 018 * company website: http://www.alkacon.com 019 * 020 * For further information about OpenCms, please see the 021 * project website: http://www.opencms.org 022 * 023 * You should have received a copy of the GNU Lesser General Public 024 * License along with this library; if not, write to the Free Software 025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 026 */ 027 028package org.opencms.gwt.client.ui.input; 029 030import org.opencms.gwt.client.validation.I_CmsValidationController; 031import org.opencms.gwt.client.validation.I_CmsValidator; 032import org.opencms.gwt.shared.CmsValidationResult; 033import org.opencms.util.CmsStringUtil; 034 035/** 036 * A validator that checks whether a field is not empty.<p> 037 * 038 * @since 8.0.0 039 */ 040public class CmsNonEmptyValidator implements I_CmsValidator { 041 042 /** The error message to display if the validation fails. */ 043 private String m_errorMessage; 044 045 /** 046 * Constructs a new validator with a given error message.<p> 047 * 048 * @param errorMessage the error message to use when the validated field is empty 049 */ 050 public CmsNonEmptyValidator(String errorMessage) { 051 052 m_errorMessage = errorMessage; 053 } 054 055 /** 056 * @see org.opencms.gwt.client.validation.I_CmsValidator#validate(org.opencms.gwt.client.ui.input.I_CmsFormField, org.opencms.gwt.client.validation.I_CmsValidationController) 057 */ 058 public void validate(I_CmsFormField field, I_CmsValidationController controller) { 059 060 String value = field.getWidget().getFormValueAsString(); 061 CmsValidationResult result; 062 if (CmsStringUtil.isEmptyOrWhitespaceOnly(value)) { 063 result = new CmsValidationResult(m_errorMessage); 064 } else { 065 result = CmsValidationResult.VALIDATION_OK; 066 } 067 controller.provideValidationResult(field.getId(), result); 068 } 069}