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;
018    
019    import org.apache.logging.log4j.Logger;
020    import org.apache.logging.log4j.core.config.plugins.Plugin;
021    import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
022    import org.apache.logging.log4j.core.config.plugins.PluginFactory;
023    import org.apache.logging.log4j.core.config.plugins.PluginValue;
024    import org.apache.logging.log4j.status.StatusLogger;
025    
026    /**
027     * Represents a key/value pair in the configuration.
028     */
029    @Plugin(name = "property", category = Node.CATEGORY, printObject = true)
030    public final class Property {
031    
032        private static final Logger LOGGER = StatusLogger.getLogger();
033    
034        private final String name;
035        private final String value;
036    
037        private Property(final String name, final String value) {
038            this.name = name;
039            this.value = value;
040        }
041    
042        /**
043         * Returns the property name.
044         * @return the property name.
045         */
046        public String getName() {
047            return name;
048        }
049    
050        /**
051         * Returns the property value.
052         * @return the value of the property.
053         */
054        public String getValue() {
055            return value;
056        }
057    
058        /**
059         * Create a Property.
060         * @param key The key.
061         * @param value The value.
062         * @return A Property.
063         */
064        @PluginFactory
065        public static Property createProperty(
066                @PluginAttribute("name") final String key,
067                @PluginValue("value") final String value) {
068            if (key == null) {
069                LOGGER.error("Property key cannot be null");
070            }
071            return new Property(key, value);
072        }
073    
074        @Override
075        public String toString() {
076            return name + '=' + value;
077        }
078    }