public boolean isConnectedto(String tableName){
		Iterator<ErdNode> linkIterator = link.iterator();

		if(!linkIterator.hasNext()){
			return false;
		}

		do{
			ErdNode iterErdNode = (ErdNode) linkIterator.next();

			String erdNodeTableName = iterErdNode.getTableName();

			if(erdNodeTableName == tableName){
				return true;
			}
		}while(linkIterator.hasNext());

		return false;
	}