TOONToKotlinClass

Convert TOON (Token-Oriented Object Notation) into production-ready Kotlin data classes directly inside JetBrains IDEs.

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An IntelliJ IDEA / Android Studio plugin that generates Kotlin data classes from TOON Token-Oriented Object Notation — a lightweight, human-readable format for defining data structures.

TOON is designed to be simpler than JSON for quickly sketching out data models. Write your schema in plain text and instantly get production-ready Kotlin code.

✨ Features

• 🔄 Instant Conversion — Write TOON, see Kotlin data classes in real-time preview
• 📦 Nested Objects — Supports deeply nested structures with inner class generation
• 📋 Lists & Object Lists — Arrays and table-style data with headers and rows
• 🏷️ 11 Annotation Frameworks — Gson, Jackson, Moshi, Fastjson, kotlinx.serialization, LoganSquare, Firebase, and more
• ⚙️ Advanced Settings — Full control via 4-tab settings dialog (Property, Annotation, Other, Extensions)
• 🧠 Smart Type Inference — Automatically detects Int, Long, Double, Boolean, String from values
• ✍️ Format & Validate — Built-in TOON formatter and validator

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📸 Screenshots

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🚀 Quick Start

Installation

1. Open IntelliJ IDEA or Android Studio
2. Go to Settings → Plugins → Marketplace
3. Search for TOONToKotlinClass
4. Click Install and restart

Usage

1. Right-click in any Kotlin file → Generate → Generate Kotlin Data Class from TOON
2. Write or paste your TOON input on the left
3. See the generated Kotlin code on the right in real-time
4. Click OK to insert the code

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📝 TOON Format

TOON uses indentation-based nesting with simple key: value pairs.

Example

TOON Input:

user:
  id: 101
  name: Saroj
  email: saroj@example.com
  is_active: true
  balance: 999.99
  address:
    city: Bangalore
    zip_code: 560001
  tags[3]: android,kotlin,dev
  orders[2]{order_id,item,price}:
    1,Laptop,75999.50
    2,Mouse,499.00

Generated Kotlin:

data class User(
    val id: Int,
    val name: String,
    val email: String,
    val isActive: Boolean,
    val balance: Double,
    val address: Address,
    val tags: List<String>,
    val orders: List<Order>
)

data class Address(
    val city: String,
    val zipCode: Int
)

data class Order(
    val orderId: Int,
    val item: String,
    val price: Double
)

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📖 TOON Syntax Reference

Syntax	Description	Example
key: value	Simple property	name: Saroj
key: (with indented children)	Nested object	address: → city: NY
key[N]: a,b,c	List of N items	tags[3]: a,b,c
key[N]{h1,h2}: rows	Object list with headers	items[2]{id,name}: ...

Type Inference

Value	Inferred Type
42	Int
100L	Long
3.14	Double
true / false	Boolean
Everything else	String

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⚙️ Advanced Settings

Click Advanced in the main dialog to access the full settings:

Property Tab

• Keyword — val or var
• Type — Non-Nullable, Nullable, or Auto Determine
• Default Value Strategy — No default, Non-null default, or Null when nullable

Annotation Tab

Choose from 11 annotation frameworks:

Framework	Annotation
None	(no annotation)
Gson	@SerializedName("key")
Jackson	@JsonProperty("key")
Moshi (Reflect)	@Json(name = "key")
Moshi (Codegen)	@Json(name = "key")
Fastjson	@JSONField(name = "key")
kotlinx.serialization	@SerialName("key") + @Serializable
LoganSquare	@JsonField(name = "key") + @JsonObject
Firebase	@PropertyName("key")
Custom	Your own template

Other Tab

• Append original TOON as comment
• Enable alphabetical ordering
• Enable inner class model
• Configurable indent & parent class template

Extensions Tab

• @Keep annotation (standard / AndroidX)
• Parcelable support (@Parcelize)
• Property & class prefix/suffix
• Disable data class / use member variables
• Internal visibility modifier
• Gson @Expose annotation

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🛠️ Building from Source

git clone https://github.com/sarojsahu/TOONToKotlinClass.git
cd TOONToKotlinClass
./gradlew buildPlugin

The plugin ZIP will be in build/distributions/.

Run in Development

./gradlew runIde

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🤝 Contributing

Contributions are welcome! Feel free to:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

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📬 Contact

Saroj Sahu

• 📧 Email: sarojsahu14369@gmail.com
• 🐙 GitHub: sarojsahu-dev

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⭐ Star this repo

If you find this plugin useful, give it a ⭐ on GitHub — it helps others discover it!