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 */
017package org.apache.logging.log4j.core.pattern;
018
019import java.util.Date;
020
021import org.apache.logging.log4j.core.config.plugins.Plugin;
022
023
024/**
025 * Formats an integer.
026 */
027@Plugin(name = "IntegerPatternConverter", category = "FileConverter")
028@ConverterKeys({ "i", "index" })
029public final class IntegerPatternConverter extends AbstractPatternConverter implements ArrayPatternConverter {
030    
031    /**
032     * Singleton.
033     */
034    private static final IntegerPatternConverter INSTANCE = new IntegerPatternConverter();
035
036    /**
037     * Private constructor.
038     */
039    private IntegerPatternConverter() {
040        super("Integer", "integer");
041    }
042
043    /**
044     * Obtains an instance of pattern converter.
045     *
046     * @param options options, may be null.
047     * @return instance of pattern converter.
048     */
049    public static IntegerPatternConverter newInstance(
050        final String[] options) {
051        return INSTANCE;
052    }
053
054    @Override
055    public void format(final StringBuilder toAppendTo, final Object... objects) {
056        for (final Object obj : objects) {
057            if (obj instanceof Integer) {
058                format(obj, toAppendTo);
059                break;
060            }
061        }
062    }
063
064    /**
065     * {@inheritDoc}
066     */
067    @Override
068    public void format(final Object obj, final StringBuilder toAppendTo) {
069        if (obj instanceof Integer) {
070            toAppendTo.append(obj.toString());
071        } else if (obj instanceof Date) {
072            toAppendTo.append(Long.toString(((Date) obj).getTime()));
073        }
074    }
075}