1 package org.eclipse.aether.spi.log; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 /** 23 * A logger factory that disables any logging. 24 * 25 * @deprecated Use SLF4J instead 26 */ 27 @Deprecated 28 public final class NullLoggerFactory 29 implements LoggerFactory 30 { 31 32 /** 33 * The singleton instance of this factory. 34 */ 35 public static final LoggerFactory INSTANCE = new NullLoggerFactory(); 36 37 /** 38 * The singleton logger used by this factory. 39 */ 40 public static final Logger LOGGER = new NullLogger(); 41 42 public Logger getLogger( String name ) 43 { 44 return LOGGER; 45 } 46 47 private NullLoggerFactory() 48 { 49 // hide constructor 50 } 51 52 /** 53 * Gets a logger from the specified factory for the given class, falling back to a logger from this factory if the 54 * specified factory is {@code null} or fails to provide a logger. 55 * 56 * @param loggerFactory The logger factory from which to get the logger, may be {@code null}. 57 * @param type The class for which to get the logger, must not be {@code null}. 58 * @return The requested logger, never {@code null}. 59 */ 60 public static Logger getSafeLogger( LoggerFactory loggerFactory, Class<?> type ) 61 { 62 if ( loggerFactory == null ) 63 { 64 return LOGGER; 65 } 66 Logger logger = loggerFactory.getLogger( type.getName() ); 67 if ( logger == null ) 68 { 69 return LOGGER; 70 } 71 return logger; 72 } 73 74 }