| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| ==================================================================== */ |
| |
| package org.apache.poi.util; |
| |
| |
| |
| /** |
| * A logger class that strives to make it as easy as possible for |
| * developers to write log calls, while simultaneously making those |
| * calls as cheap as possible by performing lazy evaluation of the log |
| * message. |
| * |
| * @author Marc Johnson (mjohnson at apache dot org) |
| * @author Glen Stampoultzis (glens at apache.org) |
| * @author Nicola Ken Barozzi (nicolaken at apache.org) |
| */ |
| public class SystemOutLogger extends POILogger |
| { |
| private String _cat; |
| |
| public void initialize(final String cat) |
| { |
| this._cat=cat; |
| } |
| |
| /** |
| * Log a message |
| * |
| * @param level One of DEBUG, INFO, WARN, ERROR, FATAL |
| * @param obj1 The object to log. |
| */ |
| |
| public void log(final int level, final Object obj1) |
| { |
| log(level, obj1, null); |
| } |
| |
| /** |
| * Log a message |
| * |
| * @param level One of DEBUG, INFO, WARN, ERROR, FATAL |
| * @param obj1 The object to log. This is converted to a string. |
| * @param exception An exception to be logged |
| */ |
| public void log(final int level, final Object obj1, |
| final Throwable exception) { |
| if (check(level)) { |
| System.out.println("["+_cat+"] "+obj1); |
| if(exception != null) { |
| exception.printStackTrace(System.out); |
| } |
| } |
| } |
| |
| /** |
| * Check if a logger is enabled to log at the specified level |
| * |
| * @param level One of DEBUG, INFO, WARN, ERROR, FATAL |
| * @see #DEBUG |
| * @see #INFO |
| * @see #WARN |
| * @see #ERROR |
| * @see #FATAL |
| */ |
| public boolean check(final int level) |
| { |
| int currentLevel; |
| try { |
| currentLevel = Integer.parseInt(System.getProperty("poi.log.level", WARN + "")); |
| } catch (SecurityException e) { |
| currentLevel = POILogger.DEBUG; |
| } |
| |
| if (level >= currentLevel) { |
| return true; |
| } |
| return false; |
| } |
| |
| |
| } // end package scope class POILogger |
| |