1 /* 2 * ==================================================================== 3 * The Apache Software License, Version 1.1 4 * 5 * Copyright (c) 2002 The Apache Software Foundation. All rights 6 * reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. The end-user documentation included with the redistribution, 21 * if any, must include the following acknowledgment: 22 * "This product includes software developed by the 23 * Apache Software Foundation (http://www.apache.org/)." 24 * Alternately, this acknowledgment may appear in the software itself, 25 * if and wherever such third-party acknowledgments normally appear. 26 * 27 * 4. The names "Apache" and "Apache Software Foundation" and 28 * "Apache POI" must not be used to endorse or promote products 29 * derived from this software without prior written permission. For 30 * written permission, please contact apache@apache.org. 31 * 32 * 5. Products derived from this software may not be called "Apache", 33 * "Apache POI", nor may "Apache" appear in their name, without 34 * prior written permission of the Apache Software Foundation. 35 * 36 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 37 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 38 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 39 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 42 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 43 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 44 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 45 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 46 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 47 * SUCH DAMAGE. 48 * ==================================================================== 49 * 50 * This software consists of voluntary contributions made by many 51 * individuals on behalf of the Apache Software Foundation. For more 52 * information on the Apache Software Foundation, please see 53 * <http://www.apache.org/>. 54 */ 55 package org.apache.poi.util; 56 57 import java.util.HashMap; 58 import java.util.Map; 59 60 /** 61 * Provides logging without clients having to mess with 62 * configuration/initialization. 63 * 64 * @author Andrew C. Oliver (acoliver at apache dot org) 65 * @author Marc Johnson (mjohnson at apache dot org) 66 * @author Nicola Ken Barozzi (nicolaken at apache.org) 67 */ 68 69 public class POILogFactory 70 { 71 // private static LogFactory _creator = LogFactory.getFactory(); 72 73 // map of POILogger instances, with classes as keys 74 private static Map _loggers = new HashMap();; 75 76 77 /** 78 * construct a POILogFactory. 79 */ 80 81 private POILogFactory() 82 { 83 } 84 85 /** 86 * Get a logger, based on a class name 87 * 88 * @param theclass the class whose name defines the log 89 * 90 * @return a POILogger for the specified class 91 */ 92 93 public static POILogger getLogger( final Class theclass ) 94 { 95 return getLogger( theclass.getName() ); 96 } 97 98 /** 99 * Get a logger, based on a String 100 * 101 * @param cat the String that defines the log 102 * 103 * @return a POILogger for the specified class 104 */ 105 106 public static POILogger getLogger( final String cat ) 107 { 108 POILogger logger = null; 109 110 if ( _loggers.containsKey( cat ) ) 111 { 112 logger = (POILogger) _loggers.get( cat ); 113 } 114 else 115 { 116 logger = new POILogger( ); 117 _loggers.put( cat, logger ); 118 } 119 return logger; 120 } 121 122 } // end public class POILogFactory 123