class ReplaceString extends BaseStep implements StepInterface {

  public boolean processRow( StepMetaInterface smi, StepDataInterface sdi ) throws KettleException {
    meta = (ReplaceStringMeta) smi;
    data = (ReplaceStringData) sdi;

    Object[] r = getRow(); // Get row from input rowset & set row busy!
    if ( r == null ) { // no more input to be expected...

      setOutputDone();
      return false;
    }

    if ( first ) {
      first = false;

      // What's the format of the output row?
      data.outputRowMeta = getInputRowMeta().clone();
      data.inputFieldsNr = data.outputRowMeta.size();
      meta.getFields( data.outputRowMeta, getStepname(), null, null, this, repository, metaStore );

      data.numFields = meta.getFieldInStream().length;
      data.inStreamNrs = new int[data.numFields];
      data.outStreamNrs = new String[data.numFields];
      data.patterns = new Pattern[data.numFields];
      data.replaceByString = new String[data.numFields];
      data.setEmptyString = new boolean[data.numFields];
      data.replaceFieldIndex = new int[data.numFields];

      for ( int i = 0; i < data.numFields; i++ ) {
        data.inStreamNrs[i] = getInputRowMeta().indexOfValue( meta.getFieldInStream()[i] );
        if ( data.inStreamNrs[i] < 0 ) {
          throw new KettleStepException( BaseMessages.getString(
            PKG, "ReplaceString.Exception.FieldRequired", meta.getFieldInStream()[i] ) );
        }

        // check field type
        if ( getInputRowMeta().getValueMeta( data.inStreamNrs[i] ).getType() != ValueMetaInterface.TYPE_STRING ) {
          throw new KettleStepException( BaseMessages.getString(
            PKG, "ReplaceString.Exception.FieldTypeNotString", meta.getFieldInStream()[i] ) );
        }

        data.outStreamNrs[i] = environmentSubstitute( meta.getFieldOutStream()[i] );

        data.patterns[i] =
          buildPattern(
            meta.getUseRegEx()[i] != ReplaceStringMeta.USE_REGEX_YES,
            meta.getCaseSensitive()[i] == ReplaceStringMeta.CASE_SENSITIVE_YES,
            meta.getWholeWord()[i] == ReplaceStringMeta.WHOLE_WORD_YES, environmentSubstitute( meta
              .getReplaceString()[i] ),
            meta.isUnicode()[i] == ReplaceStringMeta.IS_UNICODE_YES );

        String field = meta.getFieldReplaceByString()[i];
        if ( !Utils.isEmpty( field ) ) {
          data.replaceFieldIndex[i] = getInputRowMeta().indexOfValue( field );
          if ( data.replaceFieldIndex[i] < 0 ) {
            throw new KettleStepException( BaseMessages.getString(
              PKG, "ReplaceString.Exception.FieldRequired", field ) );
          }
        } else {
          data.replaceFieldIndex[i] = -1;
          data.replaceByString[i] = environmentSubstitute( meta.getReplaceByString()[i] );
        }
        data.setEmptyString[i] = meta.isSetEmptyString()[i];

      }
    } // end if first

    try {
      Object[] output = getOneRow( getInputRowMeta(), r );
      putRow( data.outputRowMeta, output );

      if ( checkFeedback( getLinesRead() ) ) {
        if ( log.isDetailed() ) {
          logDetailed( BaseMessages.getString( PKG, "ReplaceString.Log.LineNumber" ) + getLinesRead() );
        }
      }
    } catch ( KettleException e ) {
      boolean sendToErrorRow = false;
      String errorMessage = null;

      if ( getStepMeta().isDoingErrorHandling() ) {
        sendToErrorRow = true;
        errorMessage = e.toString();
      } else {
        logError( BaseMessages.getString( PKG, "ReplaceString.Log.ErrorInStep", e.getMessage() ) );
        setErrors( 1 );
        stopAll();
        setOutputDone(); // signal end to receiver(s)
        return false;
      }
      if ( sendToErrorRow ) {
        // Simply add this row to the error row
        putError( getInputRowMeta(), r, 1, errorMessage, null, "ReplaceString001" );
      }
    }
    return true;
  }

  public  ReplaceString( StepMeta stepMeta, StepDataInterface stepDataInterface, int copyNr, TransMeta transMeta,
    Trans trans );

}