sqlformatter.java

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/**
 * Title:        <p>
 * Description:  <p>
 * Copyright:    Copyright (c) Troy Thompson, Bob Byron<p>
 * Company:      JavaUnderground<p>
 * @author       Troy Thompson, Bob Byron
 * @version 1.1
 */
package com.javaunderground.jdbc;

import java.sql.*;

/**
 * Base class for all database Formatters such as OracleFormatter.
 */
public abstract class SqlFormatter {


   /**
    * Formats a blob to the following String "'<Blob length = " + blob.length()+">'"
    * This method's output will not translate directly into the database. It is informational only.
    * @param blob The blob to be translated
    * @return The String representation of the blob
    * @exception SQLException
    */
   protected String format(java.sql.Blob blob) throws SQLException{
  	 return "'<Blob length = " + blob.length()+">'";
   }

   /**
    * Formats a clob to the following String "'<Clob length = " + clob.length()+">'"
    * This method's output will not translate directly into the database. It is informational only.
    * @param clob The clob to be translated
    * @return The String representation of the clob
    * @exception SQLException
    */
   protected String format(java.sql.Clob clob)throws SQLException{
     return "'<Clob length = " + clob.length()+">'";
   }

   /**
    * Formats an Array to the following String "array.getBaseTypeName()"
    * This method's output will not translate directly into the database. It is informational only.
    * @param array The array to be translated
    * @return The base name of the array
    * @exception SQLException
    *
    */
   protected String format(java.sql.Array array)throws SQLException{
  	 return array.getBaseTypeName();
   }


   /**
    * Formats a Ref to the following String "ref.getBaseTypeName()"
    * This method's output will not translate directly into the database. It is informational only.
    * @param ref The ref to be translated
    * @return The base name of the ref
    * @exception SQLException
    */
   protected String format(java.sql.Ref ref)throws SQLException{
  	 return ref.getBaseTypeName();
   }


   /**
    * Checks the String for null and returns "'" + string + "'".
    * @param string String to be formatted
    * @return formatted String (null returns "NULL")
    */
   protected String format(java.lang.String string)throws SQLException{
     if(string.equals("NULL"))
        return string;
     else
        return "'" + string + "'";
   }

   /**
    * If object is null, Blob, Clob, Array, Ref, or String this returns the value from the protected methods
    * in this class that take those Classes.
    * @param o Object to be formatted
    * @return formatted String
    */
   public String format(Object o) throws SQLException{
     if (o == null)               return "NULL";
     if (o instanceof Blob) 	  return format((Blob)o);
     if (o instanceof Clob)       return format((Clob)o);
     if (o instanceof Array)      return format((Array)o);
     if (o instanceof Ref)        return format((Ref)o);
     if (o instanceof String)     return format((String)o);
     return o.toString();
   }
}