JRuntime: Javasite.org

JRuntime
Developed by	Helion-Prime Solutions Ltd.
Latest release	1.0 / 24 June 2008; 164 days ago
Written in	Java
OS	Cross-platform
Type	Library
License	GNU Lesser General Public License
Website	JRuntime Home Page

JRuntime is the simple library for Java. It makes easier an access to Java 6 compiler API.
This library provide us with capability to compile, execute and modify Java-code dynamically during working of the program.

1 Usage
2 External links

Usage

Dynamic class compilation

String classDef = 
	"public class MyClass {"+
	"	public String toString() {" +
	"		return \"MyClass\";" +
	"	}"+
	"}";

RuntimeClass runtimeClass = new RuntimeClass(classDef);
System.out.println(runtimeClass.newInstance());

Dynamic block execution

RuntimeBlock sum = new RuntimeBlock(
	"return (Integer)params[0]+(Integer)params[1];");

System.out.println(sum.invoke(1, 2));
System.out.println(sum.invoke(5, 100));

Dynamic class modification

public class ClassToModify {
	public String simpleMethod(String text) {
		System.out.println("Text: " + text);
		return text;
	}
}

...

MutableRuntimeClass<ClassToModify> clazz =
		new MutableRuntimeClass<ClassToModify>(ClassToModify.class);
ClassToModify instance = clazz.newInstance(new SimpleMutator() {

	@Override
	public void onBeforeMethod(Object instance, Method method,
			Object... params) {
		System.out.println("Before method: " + method.getName() + 
				", params: " + Arrays.toString(params));
	}

	@Override
	public Object onAfterMethod(Object instance, Method method,
			Object result, Object... params) {
		System.out.println("After method: " + method.getName() + 
				", params: " + Arrays.toString(params));
		return result;
	}
});

instance.simpleMethod("Test mutable class!!!");