/**
 * 
 */
package fr.emse.gitlab.saref;

import javax.swing.JComponent;
import javax.swing.JTextArea;

import org.apache.log4j.AppenderSkeleton;
import org.apache.log4j.Layout;
import org.apache.log4j.spi.LoggingEvent;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.log4j.spi.ErrorCode;

/**
 * @author Omar Qawasmeh
 * 
 * @organization Ecole des Mines de Saint Etienne
 */
/*
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * 
 * The Original Code is 'JSignPdf, a free application for PDF signing'.
 * 
 * The Initial Developer of the Original Code is Josef Cacek. Portions created
 * by Josef Cacek are Copyright (C) Josef Cacek. All Rights Reserved.
 * 
 * Contributor(s): Josef Cacek.
 * 
 * Alternatively, the contents of this file may be used under the terms of the
 * GNU Lesser General Public License, version 2.1 (the "LGPL License"), in which
 * case the provisions of LGPL License are applicable instead of those above. If
 * you wish to allow use of your version of this file only under the terms of
 * the LGPL License and not to allow others to use your version of this file
 * under the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL
 * License. If you do not delete the provisions above, a recipient may use your
 * version of this file under either the MPL or the LGPL License.
 */

public class JTextAreaAppender extends AppenderSkeleton {
	String NEW_LINE = System.getProperty("line.separator");
	private JTextArea jTextArea;

	/**
	 * Constructor.
	 * 
	 * @param jTextArea
	 */
	public JTextAreaAppender(final JTextArea jTextArea) {
		if (jTextArea == null) {
			throw new IllegalArgumentException("JTextArea has to be not-null.");
		}
		this.jTextArea = jTextArea;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.log4j.Appender#close()
	 */
	public void close() {
		jTextArea = null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.log4j.Appender#requiresLayout()
	 */
	public boolean requiresLayout() {
		return true;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.apache.log4j.AppenderSkeleton#append(org.apache.log4j.spi.LoggingEvent)
	 */

//	  protected void append(LoggingEvent event) 
//	    {
//	        if(event.getLevel().equals(Level.INFO)){
//	        jTextA.append(event.getMessage().toString());
//	        }
//	    }
	@Override
	protected void append(LoggingEvent event) {
		if (layout == null) {
			errorHandler.error("No layout for appender " + name, null, ErrorCode.MISSING_LAYOUT);
			return;
		}
		final String message = layout.format(event);
		jTextArea.append(message);

		if (layout.ignoresThrowable()) {
			for (String throwableRow : ArrayUtils.nullToEmpty(event.getThrowableStrRep())) {
				jTextArea.append(throwableRow + NEW_LINE);
			}
		}
		// scroll TextArea
		jTextArea.setCaretPosition(jTextArea.getText().length());
	}

}

