/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.fulcrum.yaafi.framework.util;
  
  /**
   * A simple replacement for the more involved version in commons-lang; this is used
   * to help construct the description string returned by an object's
   * <code>toString()</code> method.
   *
   * The code was pasted from the Hivemind container written by
   * Howard Lewis Ship.
   *
   * @author <a href="mailto:siegfried.goeschl@it20one.at">Siegfried Goeschl</a>
   */
  public class ToStringBuilder
  {
      private StringBuilder buffer = new StringBuilder();
  
      private int mode;
      private int attributeCount;
  
      private static int defaultMode = 0x03;
  
      public static final int INCLUDE_PACKAGE_PREFIX = 0x1;
      public static final int INCLUDE_HASHCODE = 0x02;
  
      public ToStringBuilder(Object target)
      {
          this(target, defaultMode);
      }
  
      public ToStringBuilder(Object target, int mode)
      {
          this.mode = mode;
  
          appendClassName(target);
          appendHashCode(target);
      }
  
      private void appendHashCode(Object target)
      {
          if ((this.mode & INCLUDE_HASHCODE) == 0)
              return;
  
          this.buffer.append('@');
          this.buffer.append(Integer.toHexString(target.hashCode()));
      }
  
      private void appendClassName(Object target)
      {
          String className = target.getClass().getName();
  
          if ((this.mode & INCLUDE_PACKAGE_PREFIX) != 0)
          {
              this.buffer.append(className);
              return;
          }
  
          int lastdotx = className.lastIndexOf('.');
  
          this.buffer.append(className.substring(lastdotx + 1));
      }
  
      public static int getDefaultMode()
      {
          return defaultMode;
      }
  
      public static void setDefaultMode(int i)
      {
          defaultMode = i;
      }
  
      /**
       * Returns the final assembled string. This may only be invoked once, after
       * all attributes have been appended.
       */
      public String toString()
      {
          if (this.attributeCount > 0)
              this.buffer.append(']');
  
         String result = this.buffer.toString();
 
         this.buffer = null;
 
         return result;
     }
 
     public void append(String attributeName, boolean value)
     {
         append(attributeName, String.valueOf(value));
     }
 
     public void append(String attributeName, byte value)
     {
         append(attributeName, String.valueOf(value));
 
     }
     public void append(String attributeName, short value)
     {
         append(attributeName, String.valueOf(value));
     }
 
     public void append(String attributeName, int value)
     {
         append(attributeName, String.valueOf(value));
     }
 
     public void append(String attributeName, Object value)
     {
         append(attributeName, String.valueOf(value));
     }
 
     public void append(String attributeName, String value)
     {
         if (this.attributeCount++ == 0)
             this.buffer.append('[');
 
         else
             this.buffer.append(' ');
 
         this.buffer.append(attributeName);
 
         this.buffer.append('=');
 
         this.buffer.append(value);
     }
 }