dlr 01/08/07 23:13:55
Modified: src/java/org/apache/torque TorqueException.java
Log:
Leveraged NestableException; unfortunately, ctors are not inheritted.
Revision Changes Path
1.2 +9 -256
jakarta-turbine-torque/src/java/org/apache/torque/TorqueException.java
Index: TorqueException.java
===================================================================
RCS file:
/home/cvs/jakarta-turbine-torque/src/java/org/apache/torque/TorqueException.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -u -r1.1 -r1.2
--- TorqueException.java 2001/08/02 05:08:17 1.1
+++ TorqueException.java 2001/08/08 06:13:55 1.2
@@ -54,279 +54,32 @@
* <http://www.apache.org/>.
*/
-import java.io.OutputStream;
-import java.io.PrintStream;
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.io.Writer;
-import java.util.LinkedList;
-import java.util.StringTokenizer;
+import org.apache.commons.util.exception.NestableException;
/**
- * The base class of all exceptions thrown by Turbine.
+ * The base class of all exceptions thrown by Torque.
*
- * It is intended to ease the debugging by carrying on the information
- * about the exception which was caught and provoked throwing the
- * current exception. Catching and rethrowing may occur multiple
- * times, and provided that all exceptions except the first one
- * are descendands of <code>TurbineException</code>, when the
- * exception is finally printed out using any of the <code>
- * printStackTrace()</code> methods, the stacktrace will contain
- * the information about all exceptions thrown and caught on
- * the way.
- * <p> Running the following program
- * <p><blockquote><pre>
- * 1 import org.apache.turbine.TurbineException;
- * 2
- * 3 public class Test {
- * 4 public static void main( String[] args ) {
- * 5 try {
- * 6 a();
- * 7 } catch(Exception e) {
- * 8 e.printStackTrace();
- * 9 }
- * 10 }
- * 11
- * 12 public static void a() throws Exception {
- * 13 try {
- * 14 b();
- * 15 } catch(Exception e) {
- * 16 throw new TurbineException("foo", e);
- * 17 }
- * 18 }
- * 19
- * 20 public static void b() throws Exception {
- * 21 try {
- * 22 c();
- * 23 } catch(Exception e) {
- * 24 throw new TurbineException("bar", e);
- * 25 }
- * 26 }
- * 27
- * 28 public static void c() throws Exception {
- * 29 throw new Exception("baz");
- * 30 }
- * 31 }
- * </pre></blockquote>
- * <p>Yields the following stacktrace:
- * <p><blockquote><pre>
- * java.lang.Exception: baz: bar: foo
- * at Test.c(Test.java:29)
- * at Test.b(Test.java:22)
- * rethrown as TurbineException: bar
- * at Test.b(Test.java:24)
- * at Test.a(Test.java:14)
- * rethrown as TurbineException: foo
- * at Test.a(Test.java:16)
- * at Test.main(Test.java:6)
- * </pre></blockquote><br>
- *
- * @author <a href="mailto:[EMAIL PROTECTED]";>Rafal Krzewski</a>
+ * @author <a href="mailto:[EMAIL PROTECTED]";>Daniel Rall</a>
+ * @author <a href="mailto:[EMAIL PROTECTED]";>Jason van Zyl</a>
*/
-public class TorqueException
- extends Exception
+public class TorqueException extends NestableException
{
- /**
- * Holds the reference to the exception or error that caused
- * this exception to be thrown.
- */
- private Throwable nested = null;
-
- /**
- * Constructs a new <code>TorqueException</code> without specified
- * detail message.
- */
public TorqueException()
{
- super();
}
- /**
- * Constructs a new <code>TorqueException</code> with specified
- * detail message.
- *
- * @param msg The error message.
- */
public TorqueException(String msg)
{
super(msg);
}
-
- /**
- * Constructs a new <code>TorqueException</code> with specified
- * nested <code>Throwable</code>.
- *
- * @param nested The exception or error that caused this exception
- * to be thrown.
- */
- public TorqueException(Throwable nested)
- {
- super();
- this.nested = nested;
- }
-
- /**
- * Constructs a new <code>TorqueException</code> with specified
- * detail message and nested <code>Throwable</code>.
- *
- * @param msg The error message.
- * @param nested The exception or error that caused this exception
- * to be thrown.
- */
- public TorqueException(String msg, Throwable nested)
- {
- super(msg);
- this.nested = nested;
- }
-
- /**
- * Returns the error message of this and any nested <code>Throwable</code>.
- *
- * @return The error message.
- */
- public String getMessage()
- {
- StringBuffer msg = new StringBuffer();
- String ourMsg = super.getMessage();
- if (ourMsg != null)
- {
- msg.append(ourMsg);
- }
- if (nested != null)
- {
- String nestedMsg = nested.getMessage();
- if (nestedMsg != null)
- {
- if (ourMsg != null)
- {
- msg.append(": ");
- }
- msg.append(nestedMsg);
- }
-
- }
- return (msg.length() > 0 ? msg.toString() : null);
- }
- /**
- * Prints the stack trace of this exception the the standar error
- * stream.
- */
- public void printStackTrace()
- {
- synchronized(System.err)
- {
- printStackTrace(System.err);
- }
- }
-
- /**
- * Prints the stack trace of this exception to the specified print stream.
- *
- * @param out <code>PrintStream</code> to use for output.
- */
- public void printStackTrace(PrintStream out)
- {
- synchronized(out)
- {
- PrintWriter pw = new PrintWriter(out, false);
- printStackTrace(pw);
- // Flush the PrintWriter before it's GC'ed.
- pw.flush();
- }
- }
-
- /**
- * Prints the stack trace of this exception to the specified print writer.
- *
- * @param out <code>PrintWriter</code> to use for output.
- */
- public void printStackTrace(PrintWriter out)
- {
- synchronized(out)
- {
- printStackTrace(out, 0);
- }
- }
-
- /**
- * Prints the stack trace of this exception skiping a specified number
- * of stack frames.
- *
- * @param out <code>PrintWriter</code> to use for output.
- * @param skip The numbere of stack frames to skip.
- */
- public void printStackTrace(PrintWriter out, int skip)
+ public TorqueException(Throwable nested)
{
- String[] st = captureStackTrace();
- if(nested != null)
- {
- if(nested instanceof TorqueException)
- {
- ((TorqueException)nested).printStackTrace(out, st.length - 2);
- }
- else if(nested instanceof TorqueRuntimeException)
- {
- ((TorqueRuntimeException)nested).printStackTrace(out, st.length -
2);
- }
- else
- {
- String[] nst = captureStackTrace(nested);
- for(int i = 0; i < nst.length - st.length + 2; i++)
- {
- out.println(nst[i]);
- }
- }
- out.print("rethrown as ");
- }
- for(int i=0; i<st.length - skip; i++)
- {
- out.println(st[i]);
- }
+ super(nested);
}
- /**
- * Captures the stack trace associated with this exception.
- *
- * @return an array of Strings describing stack frames.
- */
- private String[] captureStackTrace()
- {
- StringWriter sw = new StringWriter();
- super.printStackTrace(new PrintWriter(sw, true));
- return splitStackTrace(sw.getBuffer().toString());
- }
-
- /**
- * Captures the stack trace associated with a <code>Throwable</code>
- * object.
- *
- * @param t The <code>Throwable</code>.
- * @return An array of strings describing each stack frame.
- */
- private String[] captureStackTrace(Throwable t)
- {
- StringWriter sw = new StringWriter();
- t.printStackTrace(new PrintWriter(sw, true));
- return splitStackTrace(sw.getBuffer().toString());
- }
-
- /**
- * Splits the stack trace given as a newline separated string
- * into an array of stack frames.
- *
- * @param stackTrace The stack trace.
- * @return An array of strings describing each stack frame.
- */
- private String[] splitStackTrace(String stackTrace)
+ public TorqueException(String msg, Throwable nested)
{
- String linebreak = System.getProperty("line.separator");
- StringTokenizer st = new StringTokenizer(stackTrace, linebreak);
- LinkedList list = new LinkedList();
- while(st.hasMoreTokens())
- {
- list.add(st.nextToken());
- }
- return (String [])list.toArray(new String[] {});
+ super(msg, nested);
}
}
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