/******************************************************************************
 *  Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. 
 *  Licensed under the Apache License Version 2.0 (the 'License'). You may not
 *  use this file except in compliance with the License. A copy of the License
 *  is located at                                                            
 *                                                                              
 *      http://www.apache.org/licenses/                                        
 *  or in the 'license' file accompanying this file. This file is distributed on
 *  an 'AS IS' BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, express or
 *  implied. See the License for the specific language governing permissions and
 *  limitations under the License.                                              
******************************************************************************/

package com.amazonaws.helper;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;

public class ParameterStringBuilder {
    public static String getParamsString(Map<String, String> params) throws UnsupportedEncodingException{
      StringBuilder result = new StringBuilder();

      for (Map.Entry<String, String> entry : params.entrySet()) {
        result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
        result.append("=");
        result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
        result.append("&");
      }

      String resultString = result.toString();
      return resultString.length() > 0
        ? resultString.substring(0, resultString.length() - 1)
        : resultString;
  }
}