Lib.rs

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A library for converting JSON into code for multiple programming languages. Made with ❤️ using 🦀

JSONCodeGen is a library designed to convert JSON into code for various programming languages, facilitating the creation of classes, structs, or equivalent data structures for serialization and deserialization.

🧑‍💻 Usage

add the library to your Cargo.toml file

jsoncodegen = "*"

extract schema and generate source code for any language

use jsoncodegen::{codegen, schema};

fn main() {
    let json: serde_json::Value = serde_json::from_str(
        r#"
        {
            "library": {
                "name": "City Library",
                "books": [
                {
                    "title": "1984",
                    "author": "George Orwell",
                    "genres": ["Dystopian", "Political Fiction"]
                },
                {
                    "title": "To Kill a Mockingbird",
                    "author": "Harper Lee",
                    "genres": ["Classic", "Historical Fiction"]
                }
                ]
            }
        }
    "#,
    ).unwrap();

    let schema = schema::extract(json);
    let mut stdout = std::io::stdout().lock();
    codegen::java(schema, &mut stdout).unwrap();
}

Output

// Books.java
import com.fasterxml.jackson.annotation.*;
public class Books {
    private String author;
    private List<String> genres;
    private String title;
    public String getAuthor() { return author; }
    public void setAuthor(String value) { this.author = value; }
    public List<String> getGenres() { return genres; }
    public void setGenres(List<String> value) { this.genres = value; }
    public String getTitle() { return title; }
    public void setTitle(String value) { this.title = value; }
}
// Library.java
import com.fasterxml.jackson.annotation.*;
public class Library {
    private List<Books> books;
    private String name;
    public List<Books> getBooks() { return books; }
    public void setBooks(List<Books> value) { this.books = value; }
    public String getName() { return name; }
    public void setName(String value) { this.name = value; }
}
// Root.java
import com.fasterxml.jackson.annotation.*;
public class Root {
    private Library library;
    public Library getLibrary() { return library; }
    public void setLibrary(Library value) { this.library = value; }
}

Complex Example

{
    "items": ["one", 2, 3.0],
    "point": {
        "x": 1,
        "y": 2.0
    }
}

// Root.java
import com.fasterxml.jackson.annotation.*;
public class Root {
    private List<Items> items;
    private Point point;
    @JsonProperty("itemsこんにちは")
    public List<Items> getItems() { return items; }
    @JsonProperty("itemsこんにちは")
    public void setItems(List<Items> value) { this.items = value; }
    public Point getPoint() { return point; }
    public void setPoint(Point value) { this.point = value; }
}
// Point.java
import com.fasterxml.jackson.annotation.*;
public class Point {
    private Long x;
    private Double y;
    public Long getX() { return x; }
    public void setX(Long value) { this.x = value; }
    public Double getY() { return y; }
    public void setY(Double value) { this.y = value; }
}
// Items.java
import java.io.IOException;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.*;
@JsonSerialize(using = Items.Serializer.class)
@JsonDeserialize(using = Items.Deserializer.class)
public class Items {
    public String strVal;
    public Long longVal;
    public Double doubleVal;
    static class Serializer extends JsonSerializer<Items> {
        @Override public void serialize(Items value, JsonGenerator generator, SerializerProvider serializer) throws IOException {
            if (value.strVal != null) { generator.writeObject(value.strVal); return; }
            if (value.longVal != null) { generator.writeObject(value.longVal); return; }
            if (value.doubleVal != null) { generator.writeObject(value.doubleVal); return; }
            generator.writeNull();
        }
    }
    static class Deserializer extends JsonDeserializer<Items> {
        @Override public Items deserialize(JsonParser parser, DeserializationContext ctx) throws IOException {
            Items value = new Items();
            switch (parser.currentToken()) {
            case VALUE_NULL: break;
            case VALUE_STRING: value.strVal = parser.readValueAs(String.class); break;
            case VALUE_NUMBER_INT: value.longVal = parser.readValueAs(Long.class); break;
            case VALUE_NUMBER_FLOAT: value.doubleVal = parser.readValueAs(Double.class); break;
            default: throw new IOException("Cannot deserialize Items");
            }
            return value;
        }
    }
}

🌟 Connect with Us

M. Zahash – zahash.z@gmail.com

Distributed under the MIT license. See LICENSE for more information.

https://github.com/zahash/

🤝 Contribute to JSONCodeGen!

1. Fork it (https://github.com/zahash/jsoncodegen/fork)
2. Create your feature branch (git checkout -b feature/fooBar)
3. Commit your changes (git commit -am 'Add some fooBar')
4. Push to the branch (git push origin feature/fooBar)
5. Create a new Pull Request

❤️ Show Some Love!

If you find JSONCodeGen helpful, consider giving it a star on GitHub! Your support encourages continuous improvement and development.