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## org.apache.commons.lang
Class NotImplementedException

    java.lang.Object
      java.lang.Throwable
          java.lang.Exception
              java.lang.RuntimeException
                  java.lang.UnsupportedOperationException
                      org.apache.commons.lang.NotImplementedException

All Implemented Interfaces:
  Serializable, Nestable

    public class NotImplementedException

extends UnsupportedOperationException
implements Nestable

Thrown to indicate that a block of code has not been implemented. This exception supplements `UnsupportedOperationException` by providing a more semantically rich description of the problem.

`NotImplementedException` represents the case where the author has yet to implement the logic at this point in the program. This can act as an exception based TODO tag. Because this logic might be within a catch block, this exception suports exception chaining.

     public void foo() {
       try {
         // do something that throws an Exception
       } catch (Exception ex) {
         // don't know what to do here yet
         throw new NotImplementedException("TODO", ex);
       }
     }

Since:
  2.0
Version:
  $Id: NotImplementedException.java 905636 2010-02-02 14:03:32Z niallp $
Author:
  Apache Software Foundation, Matthew Hawthorne
See Also:
  Serialized Form

Constructor Summary
`NotImplementedException()` Constructs a new `NotImplementedException` with default message.
`NotImplementedException(Class clazz)` Constructs a new `NotImplementedException` referencing the specified class.
`NotImplementedException(String msg)` Constructs a new `NotImplementedException` with specified detail message.
`NotImplementedException(String msg, Throwable cause)` Constructs a new `NotImplementedException` with specified detail message and nested `Throwable`.
`NotImplementedException(Throwable cause)` Constructs a new `NotImplementedException` with specified nested `Throwable` and default message.

Method Summary
`Throwable` | `getCause()` Gets the root cause of this exception.
`String` | `getMessage()` Gets the combined the error message of this and any nested errors.
`String` | `getMessage(int index)` Returns the error message of the `Throwable` in the chain of `Throwable`s at the specified index, numbered from 0.
`String[]` | `getMessages()` Returns the error message of this and any nested `Throwable` objects.
`Throwable` | `getThrowable(int index)` Returns the `Throwable` in the chain by index.
`int` | `getThrowableCount()` Returns the number of nested `Throwable`s represented by this `Nestable`, including this `Nestable`.
`Throwable[]` | `getThrowables()` Returns this `Nestable` and any nested `Throwable`s in an array of `Throwable`s, one element for each `Throwable`.
`int` | `indexOfThrowable(Class type)` Returns the index of the first occurrence of the specified type.
`int` | `indexOfThrowable(Class type, int fromIndex)` Returns the index of the first occurrence of the specified type starting from the specified index.
`void` | `printPartialStackTrace(PrintWriter out)` Prints the stack trace for this exception only (root cause not included) using the specified writer.
`void` | `printStackTrace()` Prints the stack trace of this exception.
`void` | `printStackTrace(PrintStream out)` Prints the stack trace of this exception to the specified stream.
`void` | `printStackTrace(PrintWriter out)` Prints the stack trace of this exception to the specified writer.

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

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

Constructor Detail

### NotImplementedException

    public NotImplementedException()

  Constructs a new `NotImplementedException` with default message.

  Since:
    2.1

### NotImplementedException

    public NotImplementedException(String msg)

  Constructs a new `NotImplementedException` with specified detail message.

  Parameters:
    `msg` - the error message.

### NotImplementedException

    public NotImplementedException(Throwable cause)

  Constructs a new `NotImplementedException` with specified nested `Throwable` and default message.

  Parameters:
    `cause` - the exception that caused this exception to be thrown
  Since:
    2.1

### NotImplementedException

    public NotImplementedException(String msg,
                                   Throwable cause)

  Constructs a new `NotImplementedException` with specified detail message and nested `Throwable`.

  Parameters:
    `msg` - the error message
    `cause` - the exception that caused this exception to be thrown
  Since:
    2.1

### NotImplementedException

    public NotImplementedException(Class clazz)

  Constructs a new `NotImplementedException` referencing the specified class.

  Parameters:
    `clazz` - the `Class` that has not implemented the method

Method Detail

### getCause

    public Throwable getCause()

  Gets the root cause of this exception.

  Specified by:
    `getCause` in interface `Nestable`
  Overrides:
    `getCause` in class `Throwable`
  Returns:
    the root cause of this exception.
  Since:
    2.1

### getMessage

    public String getMessage()

  Gets the combined the error message of this and any nested errors.

  Specified by:
    `getMessage` in interface `Nestable`
  Overrides:
    `getMessage` in class `Throwable`
  Returns:
    the error message
  Since:
    2.1

### getMessage

    public String getMessage(int index)

  Returns the error message of the `Throwable` in the chain of `Throwable`s at the specified index, numbered from 0.

  Specified by:
    `getMessage` in interface `Nestable`
  Parameters:
    `index` - the index of the `Throwable` in the chain
  Returns:
    the error message, or null if the `Throwable` at the specified index in the chain does not contain a message
  Throws:
    `IndexOutOfBoundsException` - if the `index` argument is negative or not less than the count of `Throwable`s in the chain
  Since:
    2.1

### getMessages

    public String[] getMessages()

  Returns the error message of this and any nested `Throwable` objects. Each throwable returns a message, a null string is included in the array if there is no message for a particular `Throwable`.

  Specified by:
    `getMessages` in interface `Nestable`
  Returns:
    the error messages
  Since:
    2.1

### getThrowable

    public Throwable getThrowable(int index)

  Returns the `Throwable` in the chain by index.

  Specified by:
    `getThrowable` in interface `Nestable`
  Parameters:
    `index` - the index to retrieve
  Returns:
    the `Throwable`
  Throws:
    `IndexOutOfBoundsException` - if the `index` argument is negative or not less than the count of `Throwable`s in the chain
  Since:
    2.1

### getThrowableCount

    public int getThrowableCount()

  Returns the number of nested `Throwable`s represented by this `Nestable`, including this `Nestable`.

  Specified by:
    `getThrowableCount` in interface `Nestable`
  Returns:
    the throwable count
  Since:
    2.1

### getThrowables

    public Throwable[] getThrowables()

  Returns this `Nestable` and any nested `Throwable`s in an array of `Throwable`s, one element for each `Throwable`.

  Specified by:
    `getThrowables` in interface `Nestable`
  Returns:
    the `Throwable`s
  Since:
    2.1

### indexOfThrowable

    public int indexOfThrowable(Class type)

  Returns the index of the first occurrence of the specified type. If there is no match, `-1` is returned.

  Specified by:
    `indexOfThrowable` in interface `Nestable`
  Parameters:
    `type` - the type to search for
  Returns:
    index of the first occurrence of the type in the chain, or -1 if the type is not found
  Since:
    2.1

### indexOfThrowable

    public int indexOfThrowable(Class type,
                                int fromIndex)

  Returns the index of the first occurrence of the specified type starting from the specified index. If there is no match, `-1` is returned.

  Specified by:
    `indexOfThrowable` in interface `Nestable`
  Parameters:
    `type` - the type to search for
    `fromIndex` - the index 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
  Throws:
    `IndexOutOfBoundsException` - if the `fromIndex` argument is negative or not less than the count of `Throwable`s in the chain
  Since:
    2.1

### printStackTrace

    public void printStackTrace()

  Prints the stack trace of this exception. Includes information from the exception, if any, which caused this exception.

  Overrides:
    `printStackTrace` in class `Throwable`
  Since:
    2.1

### printStackTrace

    public void printStackTrace(PrintStream out)

  Prints the stack trace of this exception to the specified stream. Includes information from the exception, if any, which caused this exception.

  Specified by:
    `printStackTrace` in interface `Nestable`
  Overrides:
    `printStackTrace` in class `Throwable`
  Parameters:
    `out` - the stream to write to
  Since:
    2.1

### printStackTrace

    public void printStackTrace(PrintWriter out)

  Prints the stack trace of this exception to the specified writer. Includes information from the exception, if any, which caused this exception.

  Specified by:
    `printStackTrace` in interface `Nestable`
  Overrides:
    `printStackTrace` in class `Throwable`
  Parameters:
    `out` - the writer to write to
  Since:
    2.1

### printPartialStackTrace

    public final void printPartialStackTrace(PrintWriter out)

  Prints the stack trace for this exception only (root cause not included) using the specified writer.

  Specified by:
    `printPartialStackTrace` in interface `Nestable`
  Parameters:
    `out` - the writer to write to
  Since:
    2.1

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