96 lines
2.5 KiB
Java
96 lines
2.5 KiB
Java
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/* ====================================================================
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Copyright 2002-2004 Apache Software Foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.util;
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import java.util.*;
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/**
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* Provides logging without clients having to mess with
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* configuration/initialization.
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*
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* @author Andrew C. Oliver (acoliver at apache dot org)
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* @author Marc Johnson (mjohnson at apache dot org)
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* @author Nicola Ken Barozzi (nicolaken at apache.org)
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*/
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public class POILogFactory
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{
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// map of POILogger instances, with classes as keys
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private static Map _loggers = new HashMap();;
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/**
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* construct a POILogFactory.
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*/
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private POILogFactory()
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{
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}
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/**
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* Get a logger, based on a class name
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*
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* @param theclass the class whose name defines the log
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*
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* @return a POILogger for the specified class
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*/
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public static POILogger getLogger(final Class theclass)
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{
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return getLogger(theclass.getName());
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}
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/**
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* Get a logger, based on a String
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*
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* @param cat the String that defines the log
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*
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* @return a POILogger for the specified class
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*/
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public static POILogger getLogger(final String cat)
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{
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POILogger logger = null;
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if (_loggers.containsKey(cat))
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{
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logger = ( POILogger ) _loggers.get(cat);
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}
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else
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{
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try{
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String loggerClassName = System.getProperty("org.apache.poi.util.POILogger");
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Class loggerClass = Class.forName(loggerClassName);
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logger = ( POILogger ) loggerClass.newInstance();
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}
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catch(Exception e){
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logger = new NullLogger();
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}
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logger.initialize(cat);
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_loggers.put(cat, logger);
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}
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return logger;
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}
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} // end public class POILogFactory
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