    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
    018    package org.apache.logging.log4j.core.config.plugins.visitors;
    019
    020    import java.util.Map;
    021
    022    import org.apache.logging.log4j.core.LogEvent;
    023    import org.apache.logging.log4j.core.config.Configuration;
    024    import org.apache.logging.log4j.core.config.Node;
    025    import org.apache.logging.log4j.core.config.plugins.PluginBuilderAttribute;
    026    import org.apache.logging.log4j.core.util.NameUtil;
    027    import org.apache.logging.log4j.util.StringBuilders;
    028
    029    /**
    030     * PluginVisitor for PluginBuilderAttribute. If {@code null} is returned for the
    031     * {@link #visit(org.apache.logging.log4j.core.config.Configuration, org.apache.logging.log4j.core.config.Node, org.apache.logging.log4j.core.LogEvent, StringBuilder)}
    032     * method, then the default value of the field should remain untouched.
    033     *
    034     * @see org.apache.logging.log4j.core.config.plugins.util.PluginBuilder
    035     */
    036    public class PluginBuilderAttributeVisitor extends AbstractPluginVisitor<PluginBuilderAttribute> {
    037
    038        public PluginBuilderAttributeVisitor() {
    039            super(PluginBuilderAttribute.class);
    040        }
    041
    042        @Override
    043        public Object visit(final Configuration configuration, final Node node, final LogEvent event,
    044                            final StringBuilder log) {
    045            final String overridden = this.annotation.value();
    046            final String name = overridden.isEmpty() ? this.member.getName() : overridden;
    047            final Map<String, String> attributes = node.getAttributes();
    048            final String rawValue = removeAttributeValue(attributes, name, this.aliases);
    049            final String replacedValue = this.substitutor.replace(event, rawValue);
    050            final Object value = convert(replacedValue, null);
    051            final Object debugValue = this.annotation.sensitive() ? NameUtil.md5(value + this.getClass().getName()) : value;
    052            StringBuilders.appendKeyDqValue(log, "name", debugValue);
    053            return value;
    054        }
    055    }