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1 package org.apache.slide.projector.processor.core;
2
3 import java.util.Locale  ;
4 import java.util.Map ;
5 import java.util.logging.Logger ;
6
7 import org.apache.slide.projector.Context;
8 import org.apache.slide.projector.ProcessException;
9 import org.apache.slide.projector.Processor;
10 import org.apache.slide.projector.Result;
11 import org.apache.slide.projector.descriptor.AnyValueDescriptor;
12 import org.apache.slide.projector.descriptor.LocaleValueDescriptor;
13 import org.apache.slide.projector.descriptor.ParameterDescriptor;
14 import org.apache.slide.projector.descriptor.ResultDescriptor;
15 import org.apache.slide.projector.descriptor.ResultEntryDescriptor;
16 import org.apache.slide.projector.descriptor.StateDescriptor;
17 import org.apache.slide.projector.i18n.DefaultMessage;
18 import org.apache.slide.projector.i18n.ErrorMessage;
19 import org.apache.slide.projector.i18n.MessageNotFoundException;
20 import org.apache.slide.projector.i18n.ParameterMessage;
21 import org.apache.slide.projector.value.LocaleValue;
22 import org.apache.slide.projector.value.ObjectValue;
23 import org.apache.slide.projector.value.StringValue;
24
25 public class ExceptionRenderer implements Processor {
26 private static Logger logger = Logger.getLogger(ExceptionRenderer.class.getName());
27
28 final static String OK = "ok";
29
30 public final static String EXCEPTION = "exception";
31 public final static String CLASS = "class";
32 public final static String TITLE = "title";
33 public final static String STACK_TRACE = "stackTrace";
34 public final static String TEXT = "text";
35 public final static String SUMMARY = "summary";
36 public final static String DETAILS = "details";
37 public final static String LOCALE = "locale";
38
39 public Result process(Map parameter, Context context) throws Exception {
40 Locale locale = (((LocaleValue)parameter.get(LOCALE)).getLocale());
41 ObjectValue exception = (ObjectValue)parameter.get(EXCEPTION);
42 Throwable throwable = (Throwable )exception.getObject();
43 Result result = new Result(OK);
44 String title = null, text = null, summary = null;
45 StringBuffer details = new StringBuffer ();
46 if ( throwable instanceof ProcessException ) {
47 try {
48 title = ((ProcessException)throwable).getErrorMessage().getTitle(locale);
49 text = ((ProcessException)throwable).getErrorMessage().getText(locale);
50 summary = ((ProcessException)throwable).getErrorMessage().getSummary(locale);
51 } catch ( MessageNotFoundException e ) {
52 title = ((ProcessException)throwable).getErrorMessage().getId();
53 text = ((ProcessException)throwable).getErrorMessage().getId();
54 summary = ((ProcessException)throwable).getErrorMessage().getId();
55 }
56 appendNestedDetails(details, throwable, locale);
57 } else {
58 title = throwable.getLocalizedMessage();
59 text = throwable.getLocalizedMessage();
60 summary = throwable.getLocalizedMessage();
61 appendNestedDetails(details, throwable, locale);
62 }
63 if ( title == null ) title = "";
64 if ( text == null ) text = "";
65 if ( summary == null ) summary = "";
66 result.addResultEntry(TITLE, new StringValue(title));
67 result.addResultEntry(TEXT, new StringValue(text));
68 result.addResultEntry(SUMMARY, new StringValue(summary));
69 result.addResultEntry(DETAILS, new StringValue(details.toString()));
70 result.addResultEntry(CLASS, new StringValue(throwable.getClass().getName()));
71 StackTraceElement []trace = throwable.getStackTrace();
72 StringBuffer buffer = new StringBuffer (256);
73 for ( int i = 0; i < trace.length; i++ ) {
74 buffer.append(trace[i].toString());
75 buffer.append(" ");
76 }
77 result.addResultEntry(STACK_TRACE, new StringValue(buffer.toString()));
78 return result;
79 }
80
81 private void appendNestedDetails(StringBuffer details, Throwable throwable, Locale locale) {
82 if ( details.length() > 0 ) details.append(' ');
83 if ( throwable instanceof ProcessException ) {
84 ErrorMessage message = ((ProcessException)throwable).getErrorMessage();
85 details.append(message.getDetails(locale, ""));
86 } else {
87 details.append(throwable.getMessage());
88 }
89 if ( throwable.getCause() != null ) appendNestedDetails(details, throwable.getCause(), locale);
90 }
91
92 public ParameterDescriptor[] getParameterDescriptors() {
93 return new ParameterDescriptor[]{
94 new ParameterDescriptor(EXCEPTION, new ParameterMessage("exceptionRenderer/exception"), new AnyValueDescriptor()),
95 new ParameterDescriptor(LOCALE, new ParameterMessage("exceptionRenderer/locale"), new LocaleValueDescriptor(), new LocaleValue(Locale.getDefault()))
96 };
97 }
98
99
100 public ResultDescriptor getResultDescriptor() {
101 return new ResultDescriptor(new StateDescriptor[]{ StateDescriptor.OK_DESCRIPTOR },
102 new ResultEntryDescriptor[]{
103 new ResultEntryDescriptor(TITLE, new DefaultMessage("exceptionRenderer/result/title"), "text/plain", true),
104 new ResultEntryDescriptor(TEXT, new DefaultMessage("exceptionRenderer/result/text"), "text/plain", true),
105 new ResultEntryDescriptor(SUMMARY, new DefaultMessage("exceptionRenderer/result/summary"), "text/plain", true),
106 new ResultEntryDescriptor(DETAILS, new DefaultMessage("exceptionRenderer/result/details"), "text/plain", true),
107 new ResultEntryDescriptor(CLASS, new DefaultMessage("exceptionRenderer/result/class"), "text/plain", true),
108 new ResultEntryDescriptor(STACK_TRACE, new DefaultMessage("exceptionRenderer/result/stackTrace"), "text/plain", true)
109 });
110 }
111 }
112 |
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