1 /*
2 * $Id$
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 package org.apache.struts.faces.renderer;
23
24
25 import java.io.IOException;
26
27 import org.apache.struts.faces.util.StrutsContext;
28 import org.apache.struts.faces.util.Utils;
29 import org.slf4j.Logger;
30 import org.slf4j.LoggerFactory;
31
32 import jakarta.faces.component.UIComponent;
33 import jakarta.faces.context.FacesContext;
34 import jakarta.faces.context.ResponseWriter;
35
36
37 /**
38 * {@code Renderer} implementation for the {@code base} tag
39 * from the <em>Struts-Faces Integration Library</em>.
40 *
41 * @version $Rev$ $Date$
42 */
43 public class BaseRenderer extends AbstractRenderer {
44
45
46 // -------------------------------------------------------- Static Variables
47
48
49 /**
50 * The {@code Log} instance for this class.
51 */
52 private final Logger log =
53 LoggerFactory.getLogger(BaseRenderer.class);
54
55
56 // ---------------------------------------------------------- Public Methods
57
58
59 /**
60 * Render an HTML {@code base} element.
61 *
62 * @param context {@code FacesContext} for the request we are processing
63 * @param component {@code UIComponent} to be rendered
64 *
65 * @throws IOException if an input/output error occurs while rendering
66 * @throws NullPointerException if {@code context} or {@code component}
67 * is null
68 */
69 public void encodeEnd(FacesContext context, UIComponent component)
70 throws IOException {
71
72 if (context == null || component == null) {
73 throw new NullPointerException();
74 }
75
76 final String uri = StrutsContext.uri(context);
77
78 log.trace("viewId='{}' --> uri='{}'",
79 context.getViewRoot().getViewId(), uri);
80
81 ResponseWriter writer = context.getResponseWriter();
82 writer.startElement("base", component);
83 writer.writeURIAttribute("href", uri, null);
84 String target = Utils.getMapValue(String.class, component.getAttributes(), "target");
85 if (target != null) {
86 writer.writeAttribute("target", target, "target");
87 }
88 writer.endElement("base");
89 writer.writeText("\n", null);
90
91 }
92 }