ch.qos.logback.core.Layout Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.core;
import ch.qos.logback.core.spi.ContextAware;
import ch.qos.logback.core.spi.LifeCycle;
public interface Layout extends ContextAware, LifeCycle {
/**
* Transform an event (of type Object) and return it as a String after
* appropriate formatting.
*
* Taking in an object and returning a String is the least sophisticated
* way of formatting events. However, it is remarkably CPU-effective.
*
*
* @param event The event to format
* @return the event formatted as a String
*/
String doLayout(E event);
/**
* Return the file header for this layout. The returned value may be null.
* @return The header.
*/
String getFileHeader();
/**
* Return the header of the logging event formatting. The returned value
* may be null.
*
* @return The header.
*/
String getPresentationHeader();
/**
* Return the footer of the logging event formatting. The returned value
* may be null.
*
* @return The footer.
*/
String getPresentationFooter();
/**
* Return the file footer for this layout. The returned value may be null.
* @return The footer.
*/
String getFileFooter();
/**
* Returns the content type as appropriate for the implementation.
*
* @return
*/
String getContentType();
}