https://github.com/oldrev/jasper

A Lisp S-Expression style JSON predicate parser for Linq.
https://github.com/oldrev/jasper

Last synced: over 1 year ago
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A Lisp S-Expression style JSON predicate parser for Linq.

• Host: GitHub
• URL: https://github.com/oldrev/jasper
• Owner: oldrev
• Created: 2022-05-22T09:32:45.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2023-03-29T04:02:18.000Z (over 3 years ago)
• Last Synced: 2025-01-22T10:47:22.093Z (over 1 year ago)
• Language: C#
• Size: 32.2 KB
• Stars: 0
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Sandwych.Jasper

A Lisp S-Expression style JSON predicate parser for LINQ.

It works on all LINQ implementation, including: 

* LINQ to Objects

* LINQ to XML

* LINQ to DB

* NHibernate

* EntityFramework Core

* etc...

# Usage

```csharp

record class Employee(string Name, int Age);

var employees = new Employee[] {

	new Employee("Alice", 40),

	new Employee("Bob", 41),

	new Employee("Charlie", 42),

	new Employee("Ethan", 60),

};

var json = """

[

    "and", 

    [">=", "Age", 35], 

    ["or", ["=", "Name", "Alice"], [">", "Age", 45]]

]

""";

var filteredEmployees = employees.AsQueryable().WhereByJson(json);

// Equals to LINQ lambda: 

// employees.AsQueryable().Where(x => x.Age >= 35 && (x.Name == "Alice" || x.Age > 45))

```

See the demostration project `Sandwych.Jasper.Demo` for details.

# Status

PreAlpha, working in progress.