The version of Apache log4j used by SoundHelix.

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v1.3alpha8 :: src / java / org / apache / log4j / pattern /

NDCPatternConverter.java

/*
 * Copyright 1999,2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.log4j.pattern;

import org.apache.log4j.ULogger;
import org.apache.log4j.spi.LoggingEvent;


/**
 * Return the event's NDC in a StringBuffer.
 *
 * @author Ceki Gülcü
 * @since 1.3
 */
public final class NDCPatternConverter extends LoggingEventPatternConverter {
  /**
   *   Singleton.
   */
  private static final NDCPatternConverter INSTANCE =
    new NDCPatternConverter();

  /**
   * Private constructor.
   */
  private NDCPatternConverter() {
    super("NDC", "ndc");
  }

  /**
   * Obtains an instance of NDCPatternConverter.
   * @param options options, may be null.
   * @param logger  logger, current ignored, may be null.
   * @return instance of NDCPatternConverter.
   */
  public static NDCPatternConverter newInstance(
    final String[] options, final ULogger logger) {
    return INSTANCE;
  }

  /**
   * {@inheritDoc}
   */
  public void format(final LoggingEvent event, final StringBuffer toAppendTo) {
    toAppendTo.append(event.getNDC());
  }
}
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