1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18
19 package org.apache.tomcat.util.digester;
20
21
22 import org.apache.tomcat.util.IntrospectionUtils;
23 import org.xml.sax.Attributes;
24
25
26 /**
27 * <p>Rule implementation that sets properties on the object at the top of the
28 * stack, based on attributes with corresponding names.</p>
29 */
30
31 public class SetPropertiesRule extends Rule {
32
33 public interface Listener {
34 void endSetPropertiesRule();
35 }
36
37 /**
38 * Process the beginning of this element.
39 *
40 * @param namespace the namespace URI of the matching element, or an
41 * empty string if the parser is not namespace aware or the element has
42 * no namespace
43 * @param theName the local name if the parser is namespace aware, or just
44 * the element name otherwise
45 * @param attributes The attribute list for this element
46 */
47 @Override
48 public void begin(String namespace, String theName, Attributes attributes)
49 throws Exception {
50
51 // Populate the corresponding properties of the top object
52 Object top = digester.peek();
53 if (digester.log.isDebugEnabled()) {
54 if (top != null) {
55 digester.log.debug("[SetPropertiesRule]{" + digester.match +
56 "} Set " + top.getClass().getName() +
57 " properties");
58 } else {
59 digester.log.debug("[SetPropertiesRule]{" + digester.match +
60 "} Set NULL properties");
61 }
62 }
63
64 for (int i = 0; i < attributes.getLength(); i++) {
65 String name = attributes.getLocalName(i);
66 if ("".equals(name)) {
67 name = attributes.getQName(i);
68 }
69 String value = attributes.getValue(i);
70
71 if (digester.log.isDebugEnabled()) {
72 digester.log.debug("[SetPropertiesRule]{" + digester.match +
73 "} Setting property '" + name + "' to '" +
74 value + "'");
75 }
76 if (!digester.isFakeAttribute(top, name)
77 && !IntrospectionUtils.setProperty(top, name, value)
78 && digester.getRulesValidation()) {
79 if (!"optional".equals(name)) {
80 digester.log.warn(sm.getString("rule.noProperty", digester.match, name, value));
81 }
82 }
83 }
84
85 if (top instanceof Listener) {
86 ((Listener) top).endSetPropertiesRule();
87 }
88
89 }
90
91
92 /**
93 * Render a printable version of this Rule.
94 */
95 @Override
96 public String toString() {
97 StringBuilder sb = new StringBuilder("SetPropertiesRule[");
98 sb.append("]");
99 return sb.toString();
100 }
101 }
102