    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.config.json;
    018
    019    import org.apache.logging.log4j.core.config.Configuration;
    020    import org.apache.logging.log4j.core.config.ConfigurationFactory;
    021    import org.apache.logging.log4j.core.config.ConfigurationSource;
    022    import org.apache.logging.log4j.core.config.Order;
    023    import org.apache.logging.log4j.core.config.plugins.Plugin;
    024    import org.apache.logging.log4j.core.util.Loader;
    025
    026    /**
    027     *
    028     */
    029    @Plugin(name = "JsonConfigurationFactory", category = ConfigurationFactory.CATEGORY)
    030    @Order(6)
    031    public class JsonConfigurationFactory extends ConfigurationFactory {
    032
    033        /**
    034         * The file extensions supported by this factory.
    035         */
    036        private static final String[] SUFFIXES = new String[] {".json", ".jsn"};
    037
    038        private static final String[] dependencies = new String[] {
    039                "com.fasterxml.jackson.databind.ObjectMapper",
    040                "com.fasterxml.jackson.databind.JsonNode",
    041                "com.fasterxml.jackson.core.JsonParser"
    042        };
    043
    044        private final boolean isActive;
    045
    046        public JsonConfigurationFactory() {
    047            for (final String dependency : dependencies) {
    048                if (!Loader.isClassAvailable(dependency)) {
    049                    LOGGER.debug("Missing dependencies for Json support");
    050                    isActive = false;
    051                    return;
    052                }
    053            }
    054            isActive = true;
    055        }
    056
    057        @Override
    058        protected boolean isActive() {
    059            return isActive;
    060        }
    061
    062        @Override
    063        public Configuration getConfiguration(final ConfigurationSource source) {
    064            if (!isActive) {
    065                return null;
    066            }
    067            return new JsonConfiguration(source);
    068        }
    069
    070        @Override
    071        public String[] getSupportedTypes() {
    072            return SUFFIXES;
    073        }
    074    }