1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.shiro.web.tags;
20
21 import javax.servlet.jsp.JspException;
22 import javax.servlet.jsp.tagext.TagSupport;
23
24 /**
25 * @since 0.1
26 */
27 public abstract class PermissionTag extends SecureTag {
28
29 //TODO - complete JavaDoc
30
31 private String name = null;
32
33 public PermissionTag() {
34 }
35
36 public String getName() {
37 return name;
38 }
39
40 public void setName(String name) {
41 this.name = name;
42 }
43
44 protected void verifyAttributes() throws JspException {
45 String permission = getName();
46
47 if (permission == null || permission.length() == 0) {
48 String msg = "The 'name' tag attribute must be set.";
49 throw new JspException(msg);
50 }
51 }
52
53 public int onDoStartTag() throws JspException {
54
55 String p = getName();
56
57 boolean show = showTagBody(p);
58 if (show) {
59 return TagSupport.EVAL_BODY_INCLUDE;
60 } else {
61 return TagSupport.SKIP_BODY;
62 }
63 }
64
65 protected boolean isPermitted(String p) {
66 return getSubject() != null && getSubject().isPermitted(p);
67 }
68
69 protected abstract boolean showTagBody(String p);
70
71 }