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1: /* ======================================================================== 2: * JCommon : a free general purpose class library for the Java(tm) platform 3: * ======================================================================== 4: * 5: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jcommon/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * -------------- 28: * LogTarget.java 29: * -------------- 30: * (C)opyright 2002-2004, by Object Refinery Limited. 31: * 32: * $Id: LogTarget.java,v 1.3 2005/11/14 10:55:59 mungady Exp $ 33: * 34: * Changes 35: * ------- 36: * 11-May-2002 : Initial version 37: * 06-Dec-2002 : LogTargets now use Object-Parameters instead of Strings. 38: * 05-Feb-2003 : Removed unnecessary methods. 39: * 29-Apr-2003 : Distilled from the JFreeReport project and moved into JCommon 40: * 41: */ 42: 43: package org.jfree.util; 44: 45: /** 46: * An interface that defines a log target (a consumer of log messages). Classes which 47: * implement this interface can be registered with the {@link org.jfree.util.Log} class 48: * and will then receive logging messages generated by the code. 49: * 50: * @author Thomas Morgner 51: */ 52: public interface LogTarget { 53: 54: /** 55: * Loglevel ERROR. 56: */ 57: public static final int ERROR = 0; 58: 59: /** 60: * Loglevel WARN. 61: */ 62: public static final int WARN = 1; 63: 64: /** 65: * Loglevel INFO. 66: */ 67: public static final int INFO = 2; 68: 69: /** 70: * Loglevel DEBUG. 71: */ 72: public static final int DEBUG = 3; 73: 74: /** Strings for the log levels. */ 75: public static final String[] LEVELS = 76: { 77: "ERROR: ", 78: "WARN: ", 79: "INFO: ", 80: "DEBUG: " 81: }; 82: 83: /** 84: * Logs a message at a specified log level. 85: * 86: * @param level the log level. 87: * @param message the log message. 88: */ 89: public void log(int level, Object message); 90: 91: /** 92: * Logs a message at a specified log level. 93: * 94: * @param level the log level. 95: * @param message the log message. 96: * @param e the exception 97: */ 98: public void log(int level, Object message, Exception e); 99: }