org.pentaho.reporting.libraries.base.util

Class StackableException

public abstract class StackableException extends Exception

A baseclass for exceptions, which could have parent exceptions. These parent exceptions are raised in a subclass and are now wrapped into a subclass of this Exception.

The parents are printed when this exception is printed. This class exists mainly for debugging reasons, as with them it is easier to detect the root cause of an error.

Author: Thomas Morgner

UNKNOWN: UseOfSystemOutOrSystemErr

Constructor Summary
protected StackableException()
Creates a StackableRuntimeException with no message and no parent.
protected StackableException(String message, Exception ex)
Creates an exception.
protected StackableException(String message)
Creates an exception.
Method Summary
ExceptiongetParent()
Returns the parent exception (possibly null).
voidprintStackTrace(PrintStream stream)
Prints the stack trace to the specified stream.
voidprintStackTrace(PrintWriter writer)
Prints the stack trace to the specified writer.
voidprintStackTrace()
Prints this Throwable and its backtrace to the standard error stream.

Constructor Detail

StackableException

protected StackableException()
Creates a StackableRuntimeException with no message and no parent.

StackableException

protected StackableException(String message, Exception ex)
Creates an exception.

Parameters: message the exception message. ex the parent exception.

StackableException

protected StackableException(String message)
Creates an exception.

Parameters: message the exception message.

Method Detail

getParent

public Exception getParent()
Returns the parent exception (possibly null).

Returns: the parent exception.

printStackTrace

public void printStackTrace(PrintStream stream)
Prints the stack trace to the specified stream.

Parameters: stream the output stream.

printStackTrace

public void printStackTrace(PrintWriter writer)
Prints the stack trace to the specified writer.

Parameters: writer the writer.

printStackTrace

public void printStackTrace()
Prints this Throwable and its backtrace to the standard error stream. This method prints a stack trace for this Throwable object on the error output stream that is the value of the field System.err. The first line of output contains the result of the StackableException method for this object. Remaining lines represent data previously recorded by the method StackableException. The format of this information depends on the implementation, but the following example may be regarded as typical:
 java.lang.NullPointerException
         at MyClass.mash(MyClass.java:9)
         at MyClass.crunch(MyClass.java:6)
         at MyClass.main(MyClass.java:3)
 
This example was produced by running the program:
 

class MyClass {

public static void main(String[] argv) { crunch(null); } static void crunch(int[] a) { mash(a); }

static void mash(int[] b) { System.out.println(b[0]); } }

See Also: System#err