    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements. See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache license, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License. You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the license for the specific language governing permissions and
    015     * limitations under the license.
    016     */
    017    package org.apache.logging.log4j.core.pattern;
    018
    019    import org.apache.logging.log4j.core.config.plugins.Plugin;
    020
    021    /**
    022     * Formats a date by delegating to {@link DatePatternConverter}.  The default
    023     * date pattern for a %d specifier in a file name is different than
    024     * the %d pattern in pattern layout.
    025     */
    026    @Plugin(name = "FileDatePatternConverter", category = "FileConverter")
    027    @ConverterKeys({ "d", "date" })
    028    public final class FileDatePatternConverter {
    029        /**
    030         * Private constructor.
    031         */
    032        private FileDatePatternConverter() {
    033        }
    034
    035        /**
    036         * Obtains an instance of pattern converter.
    037         *
    038         * @param options options, may be null.
    039         * @return instance of pattern converter.
    040         */
    041        public static PatternConverter newInstance(final String[] options) {
    042            if (options == null || options.length == 0) {
    043                return DatePatternConverter.newInstance(
    044                    new String[]{
    045                        "yyyy-MM-dd"
    046                    });
    047            }
    048
    049            return DatePatternConverter.newInstance(options);
    050        }
    051    }