Simple Script Engine

Overview

The Simple Script Engine is a lightweight and versatile library for evaluating mathematical and logical expressions.

This implements JSR-223 ScriptEngine interface and provides a simple expression language for evaluating expressions.

Features

• Supports basic arithmetic operations: +, -, *, /, and %.
• Handles logical operations: AND, OR, and comparisons <, >, <=, >=, ==, !=
• Supports parentheses for grouping expressions.
• Adding human friendly operator tokens.

Token	Operation
and	Logical AND
or	Logical OR
=	Equal
not	Not Equal

Android

• The library is compatible with Android.
• Tested on Android 8.0(API level 26) emulator
• On Android, you can just use the SimpleExpressionEvaluator class directly.

Usage

It is required Java 17 or higher.

To add gradle dependency:

    implementation 'com.github.vrerv:simple-script-engine:0.1.8'

To evaluate an expression:

public static void main(String[] args) throws ScriptException {

	ScriptEngine engine = new ScriptEngineManager().getEngineByName("SimpleExpressionEvaluator");
	SimpleScriptContext scriptContext = new SimpleScriptContext();
	scriptContext.setBindings(new SimpleBindings(Map.of(
			"a", 10,
			"b", 20
	)), ScriptContext.ENGINE_SCOPE);
	System.out.println("Result: " + engine.eval("a + b > 10", scriptContext));
}