public static final int fieldNumber(String name)
    {
        if (1 != name.length())
            return 0;
        
        switch (name.charAt(0))
        {
            case 'v': return 1;
            case 'n': return 2;
            default: return 0;
        }
    }
A schema for standard jdk {@link Collection collections}. Null values are not serialized/written.
<p>
If {@link #preserveNull} is false and your application relies on {@link Object#equals(Object)}, 
it will fail when a serialized collection contains null values.

@author David Yu
@created Jan 26, 2011
protostuff-collectionschema/src/main/java/io/protostuff/CollectionSchema.java