package com.atlassian.sal.core.search.parameter;
   
   import org.apache.commons.lang.StringUtils;
   import com.atlassian.sal.api.search.parameter.SearchParameter;
   
   import java.io.UnsupportedEncodingException;
   import java.net.URLDecoder;
   import java.net.URLEncoder;
   
  /**
   * Basic name value pair search parameter.
   */
  public class BasicSearchParameter implements SearchParameter
  {
      private String name;
      private String value;
  
      public BasicSearchParameter(String queryString)
      {
          initFromQueryString(queryString);
      }
  
      public BasicSearchParameter(String name, String value)
      {
          this.name = name;
          this.value = value;
      }
  
      public String getName()
      {
          return name;
      }
  
      public String getValue()
      {
          return value;
      }
  
      public String buildQueryString()
      {
          final String encodedName;
          final String encodedValue;
          try
          {
              encodedName = URLEncoder.encode(name, "UTF-8");
              encodedValue = URLEncoder.encode(value, "UTF-8");
          }
          catch (UnsupportedEncodingException e)
          {
              throw new RuntimeException("unable to encode query parameters in UTF-8", e);
          }
          return encodedName + "=" + encodedValue;
      }
  
      private void initFromQueryString(String queryString)
      {
          if (StringUtils.isEmpty(queryString) || queryString.indexOf("=") == -1)
          {
              throw new IllegalArgumentException("QueryString '" + queryString + "' does not appear to be a valid query string");
          }
  
          try
          {
              final String[] encodedQueryKeyValuePair = queryString.split("=");
              this.name = URLDecoder.decode(encodedQueryKeyValuePair[0], "UTF-8");
              this.value = URLDecoder.decode(encodedQueryKeyValuePair[1], "UTF-8");
          }
          catch (UnsupportedEncodingException e)
          {
              throw new RuntimeException(e);
          }
      }
  
      public boolean equals(Object o)
      {
          if (this == o)
          {
              return true;
          }
          if (o == null || getClass() != o.getClass())
          {
              return false;
          }
  
          BasicSearchParameter that = (BasicSearchParameter) o;
  
          if (!name.equals(that.name))
          {
              return false;
          }
          if (!value.equals(that.value))
          {
              return false;
          }
  
          return true;
      }
  
      public int hashCode()
     {
         int result;
         result = name.hashCode();
         result = 31 * result + value.hashCode();
         return result;
     }
 }