/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.core.pattern;
  
  abstract public class CompositeConverter<E> extends DynamicConverter<E> {
  
    Converter<E> childConverter;
  
    public String convert(E event) {
      StringBuilder buf = new StringBuilder();
  
      for (Converter<E> c = childConverter; c != null; c = c.next) {
        c.write(buf, event);
      }
      String intermediary = buf.toString();
      return transform(intermediary);
    }
  
    abstract String transform(String in);
  
    public void setChildConverter(Converter<E> child) {
      childConverter = child;
    }
  
    public String toString() {
      StringBuilder buf = new StringBuilder();
      buf.append("CompositeConverter<");
      
      if(formattingInfo != null)
      buf.append(formattingInfo);
      
      if (childConverter != null) {
        buf.append(", children: ").append(childConverter);
      }
      buf.append(">");
      return buf.toString();
    }
  }