| /* ==================================================================== |
| 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; |
| |
| /** |
| * An implementation of the {@link POILogger} which uses System.out.println. |
| * |
| * This can be used to provide simply output from applications, however the |
| * suggested approach in production systems is to use the {@link CommonsLogger} |
| * and configure proper log-handling via Apache Commons Logging. |
| */ |
| public class SystemOutLogger implements POILogger { |
| /** |
| * Short strings for numeric log level. Use level as array index. |
| */ |
| private static final String LEVEL_STRINGS_SHORT = "?D?I?W?E?F?"; |
| |
| private String _cat; |
| |
| @Override |
| 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. |
| */ |
| @Override |
| 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 |
| */ |
| @Override |
| @SuppressForbidden("uses printStackTrace") |
| public void _log(final int level, final Object obj1, final Throwable exception) { |
| if (!check(level)) { |
| return; |
| } |
| System.out.print("["); |
| System.out.print(_cat); |
| System.out.print("]"); |
| System.out.print(LEVEL_STRINGS_SHORT.charAt(Math.min(LEVEL_STRINGS_SHORT.length()-1, level))); |
| System.out.print(" "); |
| System.out.println(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 |
| */ |
| @Override |
| public boolean check(final int level) { |
| int currentLevel; |
| try { |
| currentLevel = Integer.parseInt(System.getProperty("poi.log.level", WARN + "")); |
| } catch (SecurityException e) { |
| currentLevel = POILogger.DEBUG; |
| } |
| |
| return level >= currentLevel; |
| } |
| } |
| |