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1
13 package com.tonbeller.wcf.statusline;
14
15 import java.io.PrintWriter  ;
16 import java.io.StringWriter ;
17
18 import javax.servlet.http.HttpSession ;
19
20 import com.tonbeller.tbutils.res.Resources;
21 import com.tonbeller.wcf.controller.RequestContext;
22 import com.tonbeller.wcf.utils.JDK13Utils;
23 import com.tonbeller.wcf.utils.XmlUtils;
24
25
29 public class StatusLine {
30
31 public static final String WEBKEY = "wcfStatusLine";
32 private String message;
33 private Exception exception;
34 private String exceptionType;
35
36 private Resources resources;
37
38 private StatusLine() {
39 resources = Resources.instance(StatusLine.class);
40 }
41
42 public static synchronized StatusLine instance() {
43 return instance(RequestContext.instance().getSession());
44 }
45
46 public static synchronized StatusLine instance(HttpSession session) {
47 StatusLine sl = (StatusLine) session.getAttribute(WEBKEY);
48 if (sl == null) {
49 sl = new StatusLine();
50 session.setAttribute(WEBKEY, sl);
51 }
52 return sl;
53 }
54
55 public void setMessage(String message) {
56 this.message = message;
57 this.exception = null;
58 }
59
60 public void setError(String exceptionType, Exception exception) {
61 this.exceptionType = exceptionType;
62 this.exception = exception;
63 }
64
65 public String getStatusHTML() {
66 if (exception != null)
67 return getErrorHTML();
68 if (message != null)
69 return getMessageHTML();
70 return "";
71 }
72
73 public String getStatusText() {
74 if (exception != null)
75 return getErrorText();
76 if (message != null)
77 return getMessageText();
78 return "";
79 }
80
81 public boolean isEmpty() {
82 return exception == null && message == null;
83 }
84
85 public void clear() {
86 exception = null;
87 message = null;
88 }
89
90 private String getMessageHTML() {
91 String s = XmlUtils.escapeXml(message);
92 s = resources.getString("statusLine.message.format.html", s);
93 return s;
94 }
95
96 private String getMessageText() {
97 return resources.getString("statusLine.message.format.text", message);
98 }
99
100 private String getErrorHTML() {
101 return getErrorFmt("statusLine.error.format.html");
102 }
103
104 private String getErrorText() {
105 return getErrorFmt("statusLine.error.format.text");
106 }
107
108 private String getErrorFmt(String resKey) {
109 Object [] args = new Object [3];
110 Throwable t = unwind(exception);
111 if (exceptionType != null)
112 args[0] = exceptionType;
113 else
114 args[0] = t.getClass().getName();
115 args[1] = XmlUtils.escapeXml(t.getMessage());
116 args[2] = getStackTrace(t);
117 return resources.getString(resKey, args);
118 }
119
120 private String getStackTrace(Throwable t) {
121 StringWriter sw = new StringWriter ();
122 PrintWriter pw = new PrintWriter (sw);
123 t.printStackTrace(pw);
124 pw.close();
125 return sw.toString();
126 }
127
128 private Throwable unwind(Throwable t) {
129 Throwable x = JDK13Utils.getCause(t);
130 while (x != null) {
131 t = x;
132 x = JDK13Utils.getCause(t);
133 }
134 return t;
135 }
136
137 } |
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