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From bay...@apache.org
Subject cvs commit: jakarta-commons/lang/src/java/org/apache/commons/lang/exception ExceptionUtils.java
Date Tue, 18 Mar 2003 05:10:48 GMT
bayard      2003/03/17 21:10:48

  Modified:    lang/src/java/org/apache/commons/lang/exception
                        ExceptionUtils.java
  Log:
  Added getFullStackTrace and isNestedThrowable. Listed as Bug #16689
  
  Revision  Changes    Path
  1.21      +63 -1     jakarta-commons/lang/src/java/org/apache/commons/lang/exception/ExceptionUtils.java
  
  Index: ExceptionUtils.java
  ===================================================================
  RCS file: /home/cvs/jakarta-commons/lang/src/java/org/apache/commons/lang/exception/ExceptionUtils.java,v
  retrieving revision 1.20
  retrieving revision 1.21
  diff -u -r1.20 -r1.21
  --- ExceptionUtils.java	20 Jan 2003 23:04:19 -0000	1.20
  +++ ExceptionUtils.java	18 Mar 2003 05:10:48 -0000	1.21
  @@ -455,6 +455,68 @@
       }
   
       /**
  +     * A way to get the entire nested stack-trace of an throwable.
  +     *
  +     * @param t The <code>Throwable</code>.
  +     * @return The nested stack trace, with the root cause first.
  +     */
  +    public static String getFullStackTrace(Throwable t) {
  +        StringWriter sw = new StringWriter();
  +        PrintWriter pw = new PrintWriter(sw, true);
  +        Throwable[] ts = getThrowables(t);
  +        for(int i=0; i<ts.length; i++) {
  +            ts[i].printStackTrace(pw);
  +            if(isNestedThrowable(ts[i])) {
  +                break;
  +            }
  +        }
  +        return sw.getBuffer().toString();
  +    }
  +
  +    /**
  +     * Whether an Throwable is considered nested or not.
  +     *
  +     * @param t The <code>Throwable</code>.
  +     * @return boolean true/false
  +     */
  +    public static boolean isNestedThrowable(Throwable throwable) {
  +        if(throwable == null) {
  +            return false;
  +        }
  +
  +        if (throwable instanceof Nestable) {
  +            return true;
  +        } else if (throwable instanceof SQLException) {
  +            return true;
  +        } else if (throwable instanceof InvocationTargetException) {
  +            return true;
  +        }
  +
  +        int sz = CAUSE_METHOD_NAMES.length;
  +        for(int i=0; i<sz; i++) {
  +            try {
  +                Method method = throwable.getClass().getMethod(CAUSE_METHOD_NAMES[i], null);
  +                if(method != null) {
  +                    return true;
  +                }
  +            } catch (NoSuchMethodException ignored) {
  +            } catch (SecurityException ignored) {
  +            }
  +        }
  +
  +        try {
  +            Field field = throwable.getClass().getField("detail");
  +            if(field != null) {
  +                return true;
  +            }
  +        } catch (NoSuchFieldException ignored) {
  +        } catch (SecurityException ignored) {
  +        }
  +
  +        return false;
  +    }
  +
  +    /**
        * Captures the stack trace associated with the specified
        * <code>Throwable</code> object, decomposing it into a list of
        * stack frames.
  
  
  

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