iPhonical and model-driven software development for the iPhone

iPhonicalSoftware Development and Model-Driven Heiko Behrens (itemis) backchannel via #iphonical #iphonedevcon09

/ soft·ware de·vel·op·ment / n. the set of activities that results in software products. ~ may include research, new development, modiﬁcation, reuse, maintenance, or any other activities that result in software products.

Sketching some Typical Situations in Software Development #iphonical #iphonedevcon09

Boring code

Accidental complexity

Wrong level of abstraction

Anatomy of Modern Software Software artifact

Anatomy of Modern Software manually written code Frameworks Libraries

Anatomy of Modern Software manually written code Frameworks schematic code (manually written) Libraries

(rote) coding doesn’t cut it!

Our Problems Can we solve them with code generation?

Yes, we can!

Talking about Common Approaches to Advoid Redundancy #iphonical #iphonedevcon09

Wizards

Wizards in Practice Ruby on Rails AppLoop Xcode Project Templates

This wizard whips up a complete and running legacy application with just a single click.

Designers

Designers in Practice Graphical Designers Interface Core Builder Data

Interface Builder is no abstraction but another approach to object construction. Handwritten code is still needed.

Core Data produces code a developer can work with but overwrites handcrafted value.

Introducing Model-Driven Software Development #mdsd #iphonical #iphonedevcon09

Raise the level of abstraction where possible and generate code wisely.

One cannot abstract away everything. Manual code is great for all the special cases and details.

Use the best of both worlds at the same time.

Isn’t Core Data #mdsd? #iphonical #iphonedevcon09

Models Data Schema

Sophisticated Runtime

So, what’s # iPhonical about? #iphonedevcon09

View DSL View / GUI NIB Entity DSL ViewController ViewController Remote DSL Service DSL Transfomer ServiceFacades Mapper ORM / DAO RemoteClient Entities Messages Sqlite JSON HTTP Any ServerFacade RestService Server Server Entities Messages JBoss / RestEasy

Thoughts of an iPhone developer

View DSL View / GUI NIB Entity DSL Better Manually ViewController ViewController Remote DSL Service DSL What’s this? Transfomer ServiceFacades Mapper Core Data ORM / DAO Entities Framework Messages RemoteClient Sqlite JSON HTTP Any ServerFacade RestService Most likely Server Entities Server Messages legacy JBoss / RestEasy

Will now present Objective Resource or “iPhone on Rails” #iphonical #iphonedevcon09

Entities with Objective Resource #import "ObjectiveResource.h" #import "ObjectiveResource.h" #import "Dog.h" #import "Person.h" @interface Person : NSObject { @implementation Person ! NSString *personId; @synthesize personId; ! NSDate *updatedAt; @synthesize updatedAt; ! NSDate *createdAt; @synthesize createdAt; ! NSString *name; @synthesize name; } // handle pluralization @property (nonatomic, retain) NSString *personId; + (NSString *) getRemoteCollectionName { @property (nonatomic, retain) NSDate *updatedAt; ! return @"people"; @property (nonatomic, retain) NSDate *createdAt; } @property (nonatomic, retain) NSString *name; - (NSArray *) findAllDogs { // returns dogs ! return [Dog findRemote:[NSString stringWithFormat: - (NSArray *) findAllDogs; @"%@/dogs", personId, nil]]; - (NSArray *) findAllDogsWithResponse: (NSError * *) aError; } @end - (NSArray *) findAllDogsWithResponse: (NSError * *) aError { ! return [Dog findRemote:[NSString stringWithFormat: @"%@/dogs", personId, nil] withResponse: aError]; } - (void) dealloc { ! [personId release]; ! [updatedAt release]; ! [createdAt release]; ! [name release]; ! [super dealloc]; } @end

Real Information Content #import "ObjectiveResource.h" #import "ObjectiveResource.h" #import "Dog.h" #import "Person.h" @interface Person : NSObject { @implementation Person ! NSString *personId; @synthesize personId; ! NSDate *updatedAt; @synthesize updatedAt; ! NSDate *createdAt; @synthesize createdAt; ! NSString *name; @synthesize name; } // handle pluralization @property (nonatomic, retain) NSString *personId; + (NSString *) getRemoteCollectionName { @property (nonatomic, retain) NSDate *updatedAt; ! return @"people"; @property (nonatomic, retain) NSDate *createdAt; } @property (nonatomic, retain) NSString *name; - (NSArray *) findAllDogs { // returns dogs ! return [Dog findRemote:[NSString stringWithFormat: - (NSArray *) findAllDogs; @"%@/dogs", personId, nil]]; - (NSArray *) findAllDogsWithResponse: (NSError * *) aError; } @end - (NSArray *) findAllDogsWithResponse: (NSError * *) aError { ! return [Dog findRemote:[NSString stringWithFormat: @"%@/dogs", personId, nil] withResponse: aError]; } - (void) dealloc { ! [personId release]; ! [updatedAt release]; ! [createdAt release]; ! [name release]; ! [super dealloc]; } @end

Objective-C #ftl ? #iphonical #iphonedevcon09

Objective-C

Suppose...

You’d want to core an apple...

... for your kids.

? Right tool for the job

Your trusty swiss army knife!

Suppose...

You’d want to core a few more apples...

... for an apple cake.

Still the best tool for the job?

Better use this one

...and this one

... a DSL is ...

A speciﬁc tool for a speciﬁc job

Idea behind #iphonical : Use DSLs to describe the world #iphonedevcon09

! ! entity Car { ! ! ! ! ! ! String name; ! ! ! ! ! ! String number; ! ! ! ! ! ! Integer km; ! ! ! ! ! ! JourneyEntry * journeys; ! ! }; ! ! ! ! ! ! ! ! entity JourneyEntry { ! ! ! ! Location startLocation; Entities ! ! ! ! ! ! Location endLocation; ! ! ! ! ! ! String comment; ! ! ! ! ! ! Integer startKm; ! ! ! ! ! ! Integer endKm; ! ! ! ! ! ! Car car; ! ! ! ! ! ! Driver driver; ! ! ! ! ! ! Reason reason; ! ! }; ! ! entity CarDataResponse { ! ! ! ! ! ! String creationDate; ! ! ! ! ! ! ! ! ! ! Car car; ! ! ! ! Location location; ! ! ! ! JourneyEntry journey; Services / Messages ! ! ! ! ! ! Driver driver; ! ! }; ! ! restService iDriveLogService "/idrivelogservice" { ! ! ! ! ! ! baseUrl "http://localhost:8080/iDriveLogRESTWebServices"; ! ! ! ! ! ! get data "/data" response:CarDataResponse; ! ! }; ! ! viewController Root { UI ! ! ! ! ! ! ui Label myLabel; ! ! ! ! ! ! ui Textfield myTextfield; ! ! ! ! ! ! action myAction; ! ! };

Leverage Entity DSL for Objective Resource

View / GUI Entity DSL ViewController Objective Resource Entities and Mapping JSON / HTTP Rails Application

Wait... #iPhonical works with any framework ? #iphonedevcon09

Demo of custom templates

#iPhonical: Where to get and its future #iphonedevcon09

Open source Apache License 2.0 code code.google.com/p/iphonical/ Currently 8 participants

What’s comming up? ! Publications in upcoming Eclipse Magazin ! ShowCase about Conferences ! Tighter integration with Xcode

twitter @HBehrens blog http://HeikoBehrens.net mail Heiko.Behrens@itemis.de xing http://www.xing.com/proﬁle/Heiko_Behrens linkedin http://www.linkedin.com/in/HeikoBehrens code.google.com/p/iphonical

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iPhonical and model-driven software development for the iPhone

by Heiko Behrens on Dec 02, 2009

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iPhonical and model-driven software development for the iPhone — Presentation Transcript