text: public IndexInput openInput(string name, IOContext context) throws IOException{ensureOpen();if (context.context != Context.MERGE || context.mergeInfo.estimatedMergeBytes < minBytesDirect || fileLength(name) < minBytesDirect){return @delegate.openInput(name, context);}else{return new NativeUnixIndexInput(new File(Directory, name), mergeBufferSize);}}