@Override
public final void initIndexes(FilterChainContext context) {
final int startIdx = defaultStartIdx(context);
context.setStartIdx(startIdx);
context.setFilterIdx(startIdx);
context.setEndIdx(defaultEndIdx(context));
}
@Override
public final int defaultStartIdx(FilterChainContext context) {
if (context.getFilterIdx() != FilterChainContext.NO_FILTER_INDEX) {
return context.getFilterIdx();
}
context.setFilterIdx(0);
return 0;
}
@Override
public final int defaultStartIdx(FilterChainContext context) {
if (context.getFilterIdx() != FilterChainContext.NO_FILTER_INDEX) {
return context.getFilterIdx();
}
final int idx = context.getFilterChain().size() - 1;
context.setFilterIdx(idx);
return idx;
}
public static FilterExecutor resolve(final FilterChainContext context) {
switch (context.getOperation()) {
case READ:
return READ_EXECUTOR;
case WRITE:
return WRITE_EXECUTOR;
case ACCEPT:
return ACCEPT_EXECUTOR;
case CLOSE:
return CLOSE_EXECUTOR;
case CONNECT:
return CONNECT_EXECUTOR;
case EVENT:
return (context.getFilterIdx() == FilterChainContext.NO_FILTER_INDEX
|| context.getStartIdx() <= context.getEndIdx())
? EVENT_UPSTREAM_EXECUTOR
: EVENT_DOWNSTREAM_EXECUTOR;
default:
return null;
}
}
@Override
public final boolean hasPreviousFilter(FilterChainContext context, int idx) {
return idx < context.getFilterChain().size() - 1;
}
@Override
public final int getPreviousFilter(FilterChainContext context) {
return context.getFilterIdx() + 1;
}
@Override
public final int getNextFilter(FilterChainContext context) {
return context.getFilterIdx() - 1;
}
@Override
public final int defaultEndIdx(FilterChainContext context) {
return context.getFilterChain().size();
}
