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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: * PrintStreamLogTarget.java 29: * ------------------------- 30: * (C)opyright 2003-2005, by Thomas Morgner and Contributors. 31: * 32: * Original Author: Thomas Morgner; 33: * Contributor(s): David Gilbert (for Object Refinery Limited); 34: * 35: * $Id: PrintStreamLogTarget.java,v 1.6 2005/10/18 13:24:19 mungady Exp $ 36: * 37: * Changes 38: * ------- 39: * 02-Dec-2003 : Initial version 40: * 11-Feb-2004 : Added missing Javadocs (DG); 41: * 42: */ 43: 44: package org.jfree.util; 45: 46: import java.io.PrintStream; 47: import java.io.Serializable; 48: 49: /** 50: * A log target that sends output to a {@link PrintStream}. 51: * 52: * @author Thomas Morgner 53: */ 54: public class PrintStreamLogTarget implements LogTarget, Serializable { 55: 56: /** For serialization. */ 57: private static final long serialVersionUID = 6510564403264504688L; 58: 59: /** The printstream we use .. */ 60: private PrintStream printStream; 61: 62: /** 63: * The default constructor. Initializes this target with the system.out 64: * stream. 65: * <p> 66: * All {@link org.jfree.util.LogTarget} implementations need a default 67: * constructor. 68: */ 69: public PrintStreamLogTarget() { 70: this (System.out); 71: } 72: 73: /** 74: * The default constructor. Initializes this target with the given stream. 75: * <p> 76: * @param printStream the print stream that is used to write the content. 77: */ 78: public PrintStreamLogTarget(final PrintStream printStream) { 79: if (printStream == null) { 80: throw new NullPointerException(); 81: } 82: this.printStream = printStream; 83: } 84: 85: /** 86: * Logs a message to the main log stream. All attached logStreams will also 87: * receive this message. If the given log-level is higher than the given 88: * debug-level in the main config file, no logging will be done. 89: * 90: * @param level log level of the message. 91: * @param message text to be logged. 92: */ 93: public void log(int level, final Object message) { 94: if (level > 3) { 95: level = 3; 96: } 97: this.printStream.print(LEVELS[level]); 98: this.printStream.println(message); 99: if (level < 3) { 100: System.out.flush(); 101: } 102: } 103: 104: /** 105: * logs an message to the main-log stream. All attached logStreams will also 106: * receive this message. If the given log-level is higher than the given 107: * debug-level in the main config file, no logging will be done. 108: * 109: * The exception's stacktrace will be appended to the log-stream 110: * 111: * @param level log level of the message. 112: * @param message text to be logged. 113: * @param e the exception, which should be logged. 114: */ 115: public void log(int level, final Object message, final Exception e) { 116: if (level > 3) { 117: level = 3; 118: } 119: this.printStream.print(LEVELS[level]); 120: this.printStream.println(message); 121: e.printStackTrace(this.printStream); 122: if (level < 3) { 123: System.out.flush(); 124: } 125: } 126: }