public void addBinaryAttr(Attr attr){
  Attr attr1=findAttribute(attr.getName());
  if (attr1 == null) {
    _attrs.add(attr);
  }
 else {
    attr1.addValues(attr.getByteValues());
  }
}

public void addBinaryAttr ( Attr attr ) { Attr attr1 = findAttribute ( attr . getName ( ) ) ; if ( attr1 == null ) { _attrs . add ( attr ) ; } else { attr1 . addValues ( attr . getByteValues ( ) ) ; } }
add one attribute to the attrset the attribute should have only byte values
