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# Layout Class Reference

Inherits OptionHandler, and ObjectImpl.

Inherited by DateLayout, HTMLLayout, PatternLayout, SimpleLayout, and XMLLayout.

List of all members.

## Detailed Description

Extend this abstract class to create your own log layout format.

## Public Member Functions

virtual | ~Layout ()
void | addRef () const
void | releaseRef () const
virtual void | format (LogString &output, const spi::LoggingEventPtr &event, log4cxx::helpers::Pool &pool) const =0
| Implement this method to create your own layout format.
virtual LogString | getContentType () const
| Returns the content type output by this layout.
virtual void | appendHeader (LogString &output, log4cxx::helpers::Pool &p)
| Append the header for the layout format.
virtual void | appendFooter (LogString &output, log4cxx::helpers::Pool &p)
| Append the footer for the layout format.
virtual bool | ignoresThrowable () const =0
| If the layout handles the throwable object contained within LoggingEvent, then the layout should return `false`.

## Constructor & Destructor Documentation

virtual ~Layout | ( |  | ) | `[virtual]`

## Member Function Documentation

void addRef | ( |  | ) | const`[virtual]`

| Reimplemented from ObjectImpl.

virtual void appendFooter | ( | LogString & | output,
|  | log4cxx::helpers::Pool & | p
| ) | `[virtual]`

| Append the footer for the layout format. The base class does nothing. Reimplemented in HTMLLayout.

virtual void appendHeader | ( | LogString & | output,
|  | log4cxx::helpers::Pool & | p
| ) | `[virtual]`

| Append the header for the layout format. The base class does nothing. Reimplemented in HTMLLayout.

virtual void format | ( | LogString & | output,
|  | const spi::LoggingEventPtr & | event,
|  | log4cxx::helpers::Pool & | pool
| ) | const`[pure virtual]`

| Implement this method to create your own layout format. Implemented in HTMLLayout, PatternLayout, SimpleLayout, TTCCLayout, and XMLLayout.

virtual LogString getContentType | ( |  | ) | const`[virtual]`

| Returns the content type output by this layout. The base class returns "text/plain". Reimplemented in HTMLLayout.

virtual bool ignoresThrowable | ( |  | ) | const`[pure virtual]`

| If the layout handles the throwable object contained within LoggingEvent, then the layout should return `false`. Otherwise, if the layout ignores throwable object, then the layout should return `true`. The SimpleLayout, TTCCLayout, PatternLayout all return `true`. The XMLLayout returns `false`.

Implemented in HTMLLayout, PatternLayout, SimpleLayout, TTCCLayout, and XMLLayout.

void releaseRef | ( |  | ) | const`[virtual]`

| Reimplemented from ObjectImpl.

The documentation for this class was generated from the following file:

- layout.h