Zero Bytes

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import java.io.InputStream; import java.lang.StringBuilder; import com.sterlingcommerce.woodstock.workflow.Document; import com.sterlingcommerce.woodstock.util.Base64; Document doc = wfc.getPrimaryDocument(); InputStream in = doc.getInputStream(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < in.available(); i++) {    sb.append(in.read()); } byte data[] = sb.toString().getBytes(); byte newdata[] = Base64.encode(data); doc.setBody(new String( " "+ new String(newdata)+" ").getBytes()); return new String(sb.toString());