Java Code Examples for org.pentaho.di.core.Const#NULL_STRING

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Example 1
Source File: Value.java    From pentaho-kettle with Apache License 2.0 4 votes vote down vote up 
/**
 * Converts a String Value to String optionally padded to the specified length.
 *
 * @param pad
 *          true if you want to pad the resulting string to length.
 * @return a String optionally padded to the specified length.
 */
private String toStringString( boolean pad ) {
  String retval = null;

  if ( value == null ) {
    return null;
  }

  if ( value.getLength() <= 0 ) {
    // No length specified!
    if ( isNull() || value.getString() == null ) {
      retval = Const.NULL_STRING;
    } else {
      retval = value.getString();
    }
  } else {
    if ( pad ) {
      StringBuilder ret = null;

      if ( isNull() || value.getString() == null ) {
        ret = new StringBuilder( Const.NULL_STRING );
      } else {
        ret = new StringBuilder( value.getString() );
      }

      int length = value.getLength();
      if ( length > 16384 ) {
        length = 16384; // otherwise we get OUT OF MEMORY errors for CLOBS.
      }
      Const.rightPad( ret, length );

      retval = ret.toString();
    } else {
      if ( isNull() || value.getString() == null ) {
        retval = Const.NULL_STRING;
      } else {
        retval = value.getString();
      }
    }
  }
  return retval;
}