001 package org.apache.myfaces.tobago.taglib.component; 002 003 /* 004 * Licensed to the Apache Software Foundation (ASF) under one or more 005 * contributor license agreements. See the NOTICE file distributed with 006 * this work for additional information regarding copyright ownership. 007 * The ASF licenses this file to You under the Apache License, Version 2.0 008 * (the "License"); you may not use this file except in compliance with 009 * the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 */ 019 020 import javax.servlet.jsp.tagext.TagData; 021 import javax.servlet.jsp.tagext.TagExtraInfo; 022 import javax.servlet.jsp.tagext.ValidationMessage; 023 024 /* 025 * Date: 19.04.2006 026 * Time: 10:56:39 027 */ 028 public class CommandTagExtraInfo extends TagExtraInfo { 029 private static final ValidationMessage[] EMPTY_MESSAGE = new ValidationMessage[0]; 030 031 public ValidationMessage[] validate(TagData data) { 032 Object action = data.getAttribute("action"); 033 Object onclick = data.getAttribute("onclick"); 034 Object link = data.getAttribute("link"); 035 036 if (link != null && !(action == null && onclick == null)) { 037 return generateValidationMessages(data); 038 } 039 return EMPTY_MESSAGE; 040 } 041 042 private ValidationMessage[] generateValidationMessages(TagData data) { 043 ValidationMessage[] messages = new ValidationMessage[1]; 044 messages[0] = new ValidationMessage(data.getId(), 045 "Only one Attribute of action, onclick and link is allowed"); 046 return messages; 047 } 048 }