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 }