* an error if two interceptor share the same flag.
* @throws ChannelException
*/
protected void checkOptionFlags() throws ChannelException {
StringBuilder conflicts = new StringBuilder();
ChannelInterceptor first = interceptors;
while ( first != null ) {
int flag = first.getOptionFlag();
if ( flag != 0 ) {
ChannelInterceptor next = first.getNext();
while ( next != null ) {
int nflag = next.getOptionFlag();
if (nflag!=0 && (((flag & nflag) == flag ) || ((flag & nflag) == nflag)) ) {
conflicts.append("[");
conflicts.append(first.getClass().getName());
conflicts.append(":");
conflicts.append(flag);
conflicts.append(" == ");
conflicts.append(next.getClass().getName());
conflicts.append(":");
conflicts.append(nflag);
conflicts.append("] ");
}//end if
next = next.getNext();
}//while
}//end if
first = first.getNext();
}//while
if ( conflicts.length() > 0 ) throw new ChannelException("Interceptor option flag conflict: "+conflicts.toString());