Defining Scheme : 101

1. A Scheme contain field definition #34
2. Is also used to parse & transform data #36
3. ----- Examples (Scheme, Fields & Coercion) 
1. Scheme personScheme = new TextLine( new Fields( "first_name","last_name", "age") ); #35
2. Fields longFields = new Fields("age", "height", Long.class); 
3. ---
4. Fields[] nameFields = new Fields[] {new Fields("name"), new Fields("age")}; #35
5. Type[]typeFields = new Type[]{ String.class, Integer.class }; 
6. Scheme personScheme = new TextLine(new Fields(nameFields, typeFields)); 
7. ---
8. ----- Fluent Interface
9. Fields inFields = new Fields("name", "address", "phone", "age"); 
10. inFields.appplyType("age", long.class); 
4. Preexisting schemes #35
1. NullScheme
2. TextLine
1. Used to read & write text files(gets offset<TAB>data) #36
3. TextDelimited
1. Used to read delimited text files #37
4. SequenceFile #38