Utility method that return a String representation of a map. The elements will be represented as "key = value" : Map « Collections Data Structure « Java






  1. Java
  2. Collections Data Structure
  3. Map

Utility method that return a String representation of a map. The elements will be represented as "key = value"

        
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/*
 *  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. 
 *  
 */



/**
 * Various string manipulation methods that are more efficient then chaining
 * string operations: all is done in the same buffer without creating a bunch of
 * string objects.
 * 
 * @author <a href="mailto:dev@labs.apache.org">Dungeon Project</a>
 */
public class Main {
  /**
   * Utility method that return a String representation of a map. The elements
   * will be represented as "key = value"
   * 
   * @param map
   *            The map to transform to a string
   * @return A csv string
   */
  public static final String mapToString( Map map )
  {
      if ( ( map == null ) || ( map.size() == 0 ) )
      {
          return "";
      }

      StringBuffer sb = new StringBuffer();
      boolean isFirst = true;

      Iterator iter = map.keySet().iterator();

      while ( iter.hasNext() )
      {
          if ( isFirst )
          {
              isFirst = false;
          }
          else
          {
              sb.append( ", " );
          }

          Object key = iter.next();
          sb.append( key );
          sb.append( " = '" ).append( map.get( key ) ).append( "'" );
      }

      return sb.toString();
  }

}








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