001/*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019package org.crsh.text.renderers;
020
021import org.crsh.text.Color;
022import org.crsh.text.LineRenderer;
023import org.crsh.text.Renderer;
024import org.crsh.text.ui.LabelElement;
025import org.crsh.util.BaseIterator;
026
027import java.util.Iterator;
028import java.util.logging.Level;
029import java.util.logging.LogRecord;
030import java.util.logging.SimpleFormatter;
031
032/**
033 * A renderer for {@link java.util.logging.LogRecord} objects based on the {@link java.util.logging.SimpleFormatter}
034 * formatter.
035 *
036 * @author Julien Viet
037 */
038public class LogRecordRenderer extends Renderer<LogRecord> {
039
040  @Override
041  public Class<LogRecord> getType() {
042    return LogRecord.class;
043  }
044
045  @Override
046  public LineRenderer renderer(final Iterator<LogRecord> stream) {
047    return LineRenderer.vertical(new Iterable<LineRenderer>() {
048      @Override
049      public Iterator<LineRenderer> iterator() {
050        return new BaseIterator<LineRenderer>() {
051          final SimpleFormatter formatter = new SimpleFormatter();
052          @Override
053          public boolean hasNext() {
054            return stream.hasNext();
055          }
056          @Override
057          public LineRenderer next() {
058            LogRecord record = stream.next();
059            String line = formatter.format(record);
060            Color color;
061            if (record.getLevel() == Level.SEVERE) {
062              color = Color.red;
063            } else if (record.getLevel() == Level.WARNING) {
064              color = Color.yellow;
065            } else if (record.getLevel() == Level.INFO) {
066              color = Color.green;
067            } else {
068              color = Color.blue;
069            }
070            return new LabelElement(line).style(color.fg()).renderer();
071          }
072        };
073      }
074    });
075  }
076}