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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements. See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License. You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17
    18  package org.apache.logging.log4j.core.config.plugins.visitors;
    19
    20  import org.apache.logging.log4j.core.LogEvent;
    21  import org.apache.logging.log4j.core.config.Configuration;
    22  import org.apache.logging.log4j.core.config.Node;
    23  import org.apache.logging.log4j.core.config.plugins.PluginValue;
    24  import org.apache.logging.log4j.util.StringBuilders;
    25
    26  /**
    27   * PluginVisitor implementation for {@link PluginValue}.
    28   */
    29  public class PluginValueVisitor extends AbstractPluginVisitor<PluginValue> {
    30      public PluginValueVisitor() {
    31          super(PluginValue.class);
    32      }
    33
    34      @Override
    35      public Object visit(final Configuration configuration, final Node node, final LogEvent event,
    36                          final StringBuilder log) {
    37          final String name = this.annotation.value();
    38          final String rawValue = node.getValue() != null ? node.getValue() :
    39              removeAttributeValue(node.getAttributes(), "value");
    40          final String value = this.substitutor.replace(event, rawValue);
    41          StringBuilders.appendKeyDqValue(log, name, value);
    42          return value;
    43      }
    44  }