NestableException (The Adobe AEM Quickstart and Web Application.)

java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - org.apache.commons.lang.exception.NestableException

All Implemented Interfaces:: java.io.Serializable, Nestable

public class NestableException
extends java.lang.Exception
implements Nestable

The base class of all exceptions which can contain other exceptions. 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 descendants of NestedException, when the exception is finally printed out using any of the


 printStackTrace()

methods, the stack trace will contain the information about all exceptions thrown and caught on the way.

Running the following program

  1 import org.apache.commons.lang.exception.NestableException;
  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 NestableException("foo", e);
 17          }
 18      }
 19
 20      public static void b() throws Exception {
 21          try {
 22              c();
 23          } catch(Exception e) {
 24              throw new NestableException("bar", e);
 25          }
 26      }
 27
 28      public static void c() throws Exception {
 29          throw new Exception("baz");
 30      }
 31 }

Yields the following stack trace:

 org.apache.commons.lang.exception.NestableException: foo
         at Test.a(Test.java:16)
         at Test.main(Test.java:6)
 Caused by: org.apache.commons.lang.exception.NestableException: bar
         at Test.b(Test.java:24)
         at Test.a(Test.java:14)
         ... 1 more
 Caused by: java.lang.Exception: baz
         at Test.c(Test.java:29)
         at Test.b(Test.java:22)
         ... 2 more

Since:: 1.0
See Also:: Serialized Form

Constructor Summary

Constructors
Constructor and Description
`NestableException()` Constructs a new `NestableException` without specified detail message.
`NestableException(java.lang.String msg)` Constructs a new `NestableException` with specified detail message.
`NestableException(java.lang.String msg, java.lang.Throwable cause)` Constructs a new `NestableException` with specified detail message and nested `Throwable`.
`NestableException(java.lang.Throwable cause)` Constructs a new `NestableException` with specified nested `Throwable`.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.lang.Throwable`	`getCause()` Returns the reference to the exception or error that caused the exception implementing the `Nestable` to be thrown.
`java.lang.String`	`getMessage()` Returns the detail message string of this throwable.
`java.lang.String`	`getMessage(int index)` Returns the error message of the `Throwable` in the chain of `Throwable`s at the specified index, numbered from 0.
`java.lang.String[]`	`getMessages()` Returns the error message of this and any nested `Throwable`s in an array of Strings, one element for each message.
`java.lang.Throwable`	`getThrowable(int index)` Returns the `Throwable` in the chain of `Throwable`s at the specified index, numbered from 0.
`int`	`getThrowableCount()` Returns the number of nested `Throwable`s represented by this `Nestable`, including this `Nestable`.
`java.lang.Throwable[]`	`getThrowables()` Returns this `Nestable` and any nested `Throwable`s in an array of `Throwable`s, one element for each `Throwable`.
`int`	`indexOfThrowable(java.lang.Class type)` Returns the index, numbered from 0, of the first occurrence of the specified type, or a subclass, in the chain of `Throwable`s.
`int`	`indexOfThrowable(java.lang.Class type, int fromIndex)` Returns the index, numbered from 0, of the first `Throwable` that matches the specified type, or a subclass, in the chain of `Throwable`s with an index greater than or equal to the specified index.
`void`	`printPartialStackTrace(java.io.PrintWriter out)` Prints the stack trace for this exception only--root cause not included--using the provided writer.
`void`	`printStackTrace()`
`void`	`printStackTrace(java.io.PrintStream out)` Prints the stack trace of this exception to the specified print stream.
`void`	`printStackTrace(java.io.PrintWriter out)` Prints the stack trace of this exception to the specified print writer.

Methods inherited from class java.lang.Throwable
addSuppressed, fillInStackTrace, getLocalizedMessage, getStackTrace, getSuppressed, initCause, setStackTrace, toString

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - NestableException
```
public NestableException()
```
    Constructs a new NestableException without specified detail message.
  - NestableException
```
public NestableException(java.lang.String msg)
```
    Constructs a new NestableException with specified detail message.
    
    Parameters:
    
    msg - The error message.
  - NestableException
```
public NestableException(java.lang.Throwable cause)
```
    Constructs a new NestableException with specified nested Throwable.
    
    Parameters:
    
    cause - the exception or error that caused this exception to be thrown
  - NestableException
```
public NestableException(java.lang.String msg,
                         java.lang.Throwable cause)
```
    Constructs a new NestableException with specified detail message and nested Throwable.
    
    Parameters:
    
    msg - the error message
    
    cause - the exception or error that caused this exception to be thrown
- Method Detail
  - getCause
```
public java.lang.Throwable getCause()
```
    Returns the reference to the exception or error that caused the exception implementing the Nestable to be thrown.
    
    Specified by:
    
    getCause in interface Nestable
    
    Overrides:
    
    getCause in class java.lang.Throwable
    
    Returns:
    
    throwable that caused the original exception
  - getMessage
```
public java.lang.String getMessage()
```
    Returns the detail message string of this throwable. If it was created with a null message, returns the following: (cause==null ? null : cause.toString()).
    
    Specified by:
    
    getMessage in interface Nestable
    
    Overrides:
    
    getMessage in class java.lang.Throwable
    
    Returns:
    
    String message string of the throwable
  - getMessage
```
public java.lang.String getMessage(int index)
```
    Returns the error message of the Throwable in the chain of Throwables at the specified index, numbered from 0.
    
    Specified by:
    
    getMessage in interface Nestable
    
    Parameters:
    
    index - the index of the Throwable in the chain of Throwables
    
    Returns:
    
    the error message, or null if the Throwable at the specified index in the chain does not contain a message
  - getMessages
```
public java.lang.String[] getMessages()
```
    Returns the error message of this and any nested Throwables in an array of Strings, one element for each message. Any Throwable not containing a message is represented in the array by a null. This has the effect of cause the length of the returned array to be equal to the result of the Nestable.getThrowableCount() operation.
    
    Specified by:
    
    getMessages in interface Nestable
    
    Returns:
    
    the error messages
  - getThrowable
```
public java.lang.Throwable getThrowable(int index)
```
    Returns the Throwable in the chain of Throwables at the specified index, numbered from 0.
    
    Specified by:
    
    getThrowable in interface Nestable
    
    Parameters:
    
    index - the index, numbered from 0, of the Throwable in the chain of Throwables
    
    Returns:
    
    the Throwable
  - getThrowableCount
```
public int getThrowableCount()
```
    Returns the number of nested Throwables represented by this Nestable, including this Nestable.
    
    Specified by:
    
    getThrowableCount in interface Nestable
    
    Returns:
    
    the throwable count
  - getThrowables
```
public java.lang.Throwable[] getThrowables()
```
    Returns this Nestable and any nested Throwables in an array of Throwables, one element for each Throwable.
    
    Specified by:
    
    getThrowables in interface Nestable
    
    Returns:
    
    the Throwables
  - indexOfThrowable
```
public int indexOfThrowable(java.lang.Class type)
```
    Returns the index, numbered from 0, of the first occurrence of the specified type, or a subclass, in the chain of Throwables. The method returns -1 if the specified type is not found in the chain.
    NOTE: From v2.1, we have clarified the Nestable interface such that this method matches subclasses. If you want to NOT match subclasses, please use ExceptionUtils.indexOfThrowable(Throwable, Class) (which is avaiable in all versions of lang).
    
    Specified by:
    
    indexOfThrowable in interface Nestable
    
    Parameters:
    
    type - the type to find, subclasses match, null returns -1
    
    Returns:
    
    index of the first occurrence of the type in the chain, or -1 if the type is not found
  - indexOfThrowable
```
public int indexOfThrowable(java.lang.Class type,
                            int fromIndex)
```
    Returns the index, numbered from 0, of the first Throwable that matches the specified type, or a subclass, in the chain of Throwables with an index greater than or equal to the specified index. The method returns -1 if the specified type is not found in the chain.
    NOTE: From v2.1, we have clarified the Nestable interface such that this method matches subclasses. If you want to NOT match subclasses, please use ExceptionUtils.indexOfThrowable(Throwable, Class, int) (which is avaiable in all versions of lang).
    
    Specified by:
    
    indexOfThrowable in interface Nestable
    
    Parameters:
    
    type - the type to find, subclasses match, null returns -1
    
    fromIndex - the index, numbered from 0, of the starting position in the chain to be searched
    
    Returns:
    
    index of the first occurrence of the type in the chain, or -1 if the type is not found
  - printStackTrace
```
public void printStackTrace()
```
    Overrides:
    
    printStackTrace in class java.lang.Throwable
  - printStackTrace
```
public void printStackTrace(java.io.PrintStream out)
```
    Prints the stack trace of this exception to the specified print stream. Includes information from the exception, if any, which caused this exception.
    
    Specified by:
    
    printStackTrace in interface Nestable
    
    Overrides:
    
    printStackTrace in class java.lang.Throwable
    
    Parameters:
    
    out - PrintStream to use for output.
  - printStackTrace
```
public void printStackTrace(java.io.PrintWriter out)
```
    Prints the stack trace of this exception to the specified print writer. Includes information from the exception, if any, which caused this exception.
    
    Specified by:
    
    printStackTrace in interface Nestable
    
    Overrides:
    
    printStackTrace in class java.lang.Throwable
    
    Parameters:
    
    out - PrintWriter to use for output.
  - printPartialStackTrace
```
public final void printPartialStackTrace(java.io.PrintWriter out)
```
    Prints the stack trace for this exception only--root cause not included--using the provided writer. Used by NestableDelegate to write individual stack traces to a buffer. The implementation of this method should call super.printStackTrace(out); in most cases.
    
    Specified by:
    
    printPartialStackTrace in interface Nestable
    
    Parameters:
    
    out - The writer to use.

Class NestableException

Constructor Summary

Method Summary

Methods inherited from class java.lang.Throwable

Methods inherited from class java.lang.Object

Constructor Detail

NestableException

NestableException

NestableException

NestableException

Method Detail

getCause

getMessage

getMessage

getMessages

getThrowable

getThrowableCount

getThrowables

indexOfThrowable

indexOfThrowable

printStackTrace

printStackTrace

printStackTrace

printPartialStackTrace