Now that we have the means to transform a simple line into an HTML encoded line, we need a way to decide which tags we should apply. Right from the start, I knew that we would be applying yet another pattern, one that is eminently suitable for asking the question, "Should I handle this tag?" If no, then I will forward this on so that something else can decide whether or not it should handle the tag.
We are going to use another behavioral pattern to handle this—the chain-of-responsibility pattern. This pattern lets us chain together a series of classes by creating a class that accepts the next class in the chain, along with a method to handle a request. Depending on ...
