protected void addInputNode_internal(BNode inputNode){
  if (inputNodes.containsKey(inputNode.getId())) {
    log.warning("node " + inputNode.getId() + " already included in the input nodes of "+ nodeId);
  }
  inputNodes.put(inputNode.getId(),inputNode);
}

protected void addInputNode_internal ( BNode inputNode ) { if ( inputNodes . containsKey ( inputNode . getId ( ) ) ) { log . warning ( "node " + inputNode . getId ( ) + " already included in the input nodes of " + nodeId ) ; } inputNodes . put ( inputNode . getId ( ) , inputNode ) ; }
adds a new incoming relation to the node . this method should never be called outside the addrelation method , to ensure consistency between the input and output links .
