1 /*
2 * $Id: StrutsBodyTagSupport.java 726715 2008-12-15 15:39:15Z musachy $
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.struts2.views.jsp;
23
24 import java.io.PrintWriter;
25
26 import javax.servlet.jsp.tagext.BodyTagSupport;
27
28 import org.apache.struts2.components.Component;
29 import org.apache.struts2.util.FastByteArrayOutputStream;
30
31 import com.opensymphony.xwork2.util.TextParseUtil;
32 import com.opensymphony.xwork2.util.ValueStack;
33
34
35 /**
36 * Contains common functonalities for Struts JSP Tags.
37 *
38 */
39 public class StrutsBodyTagSupport extends BodyTagSupport {
40
41 private static final long serialVersionUID = -1201668454354226175L;
42
43 protected ValueStack getStack() {
44 return TagUtils.getStack(pageContext);
45 }
46
47 protected String findString(String expr) {
48 return (String) findValue(expr, String.class);
49 }
50
51 protected Object findValue(String expr) {
52 expr = Component.stripExpressionIfAltSyntax(getStack(), expr);
53
54 return getStack().findValue(expr);
55 }
56
57 protected Object findValue(String expr, Class toType) {
58 if (Component.altSyntax(getStack()) && toType == String.class) {
59 return TextParseUtil.translateVariables('%', expr, getStack());
60 //return translateVariables(expr, getStack());
61 } else {
62 expr = Component.stripExpressionIfAltSyntax(getStack(), expr);
63
64 return getStack().findValue(expr, toType);
65 }
66 }
67
68 protected String toString(Throwable t) {
69 FastByteArrayOutputStream bout = new FastByteArrayOutputStream();
70 PrintWriter wrt = new PrintWriter(bout);
71 t.printStackTrace(wrt);
72 wrt.close();
73
74 return bout.toString();
75 }
76
77 protected String getBody() {
78 if (bodyContent == null) {
79 return "";
80 } else {
81 return bodyContent.getString().trim();
82 }
83 }
84 }
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