org.apache.logging.log4j.core.layout.AbstractLayout Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache license, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the license for the specific language governing permissions and
* limitations under the license.
*/
package org.apache.logging.log4j.core.layout;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.status.StatusLogger;
/**
* Abstract base class for Layouts.
*
* @param
* The Class that the Layout will format the LogEvent into.
*/
public abstract class AbstractLayout implements Layout, Serializable {
/**
* Allow subclasses access to the status logger without creating another instance.
*/
protected static final Logger LOGGER = StatusLogger.getLogger();
private static final long serialVersionUID = 1L;
/**
* The header to include when the stream is opened. May be null.
*/
protected final byte[] header;
/**
* The footer to add when the stream is closed. May be null.
*/
protected final byte[] footer;
/**
* Constructs a layout with an optional header and footer.
*
* @param header
* The header to include when the stream is opened. May be null.
* @param footer
* The footer to add when the stream is closed. May be null.
*/
public AbstractLayout(final byte[] header, final byte[] footer) {
super();
this.header = header;
this.footer = footer;
}
@Override
public Map getContentFormat() {
return new HashMap<>();
}
/**
* Returns the footer, if one is available.
*
* @return A byte array containing the footer.
*/
@Override
public byte[] getFooter() {
return footer;
}
/**
* Returns the header, if one is available.
*
* @return A byte array containing the header.
*/
@Override
public byte[] getHeader() {
return header;
}
}