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.config;
018
019import org.apache.logging.log4j.core.config.plugins.Plugin;
020
021/**
022 *
023 */
024@Plugin(name = "JSONConfigurationFactory", category = "ConfigurationFactory")
025@Order(6)
026public class JSONConfigurationFactory extends ConfigurationFactory {
027
028    /**
029     * The file extensions supported by this factory.
030     */
031    public static final String[] SUFFIXES = new String[] {".json", ".jsn"};
032
033    private static String[] dependencies = new String[] {
034            "com.fasterxml.jackson.databind.ObjectMapper",
035            "com.fasterxml.jackson.databind.JsonNode",
036            "com.fasterxml.jackson.core.JsonParser"
037    };
038
039    private boolean isActive;
040
041    public JSONConfigurationFactory() {
042        try {
043            for (final String item : dependencies) {
044                Class.forName(item);
045            }
046        } catch (final ClassNotFoundException ex) {
047            LOGGER.debug("Missing dependencies for Json support");
048            isActive = false;
049            return;
050        }
051        isActive = true;
052    }
053
054    @Override
055    protected boolean isActive() {
056        return isActive;
057    }
058
059    @Override
060    public Configuration getConfiguration(final ConfigurationSource source) {
061        if (!isActive) {
062            return null;
063        }
064        return new JSONConfiguration(source);
065    }
066
067    @Override
068    public String[] getSupportedTypes() {
069        return SUFFIXES;
070    }
071}