81 lines
2.5 KiB
Java
81 lines
2.5 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. 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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/**
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* A logger class that strives to make it as easy as possible for
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* developers to write log calls, while simultaneously making those
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* calls as cheap as possible by performing lazy evaluation of the log
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* message.<p>
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*/
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@Internal
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public class NullLogger extends POILogger {
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@Override
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public void initialize(final String cat) {
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// do nothing
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}
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/**
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* Log a message
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*
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* @param level One of DEBUG, INFO, WARN, ERROR, FATAL
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* @param obj1 The object to log.
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*/
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@Override
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protected void _log(final int level, final Object obj1) {
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// do nothing
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}
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/**
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* Log a message
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*
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* @param level One of DEBUG, INFO, WARN, ERROR, FATAL
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* @param obj1 The object to log. This is converted to a string.
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* @param exception An exception to be logged
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*/
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@Override
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protected void _log(int level, Object obj1, final Throwable exception) {
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// do nothing
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}
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/**
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* Log a message. Lazily appends Object parameters together.
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* If the last parameter is a {@link Throwable} it is logged specially.
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*
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* @param level One of DEBUG, INFO, WARN, ERROR, FATAL
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* @param objs the objects to place in the message
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*/
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@Override
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public void log(int level, Object... objs) {
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// do nothing
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}
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/**
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* Check if a logger is enabled to log at the specified level
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*
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* @param level One of DEBUG, INFO, WARN, ERROR, FATAL
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*/
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@Override
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public boolean check(final int level) {
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return false;
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}
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}
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