Pseudocode command processing

// The command class itself, where "commandArgs" are the arguments provided for the command

CommandBase commandClass = this.getCommandClass(commandArgs[0]);

// The target index in the command's syntax (indicating where the selector is)

int targetIndex = commandClass.getTargetIndex();

if (getsMultipleTargets(commandArgs[targetIndex])) {

    // Process the selector using the target index to locate it in the arguments provided

    List<Entity> entities = this.processSelector(commandArgs[targetIndex]);

    // Cycle through each entity...

    for (Entity entity : entities) {

        // Replace the selector with a UUID

        commandArgs[targetIndex] = entity.getUUID();

        // Execute command

        commandClass.process(commandArgs);
    }
} else {

    // Execute command without any changes, meaning the selector is not processed and is at the whim of the command class

    commandClass.process(commandArgs);
}