Overview
jOOR stands for jOOR Object Oriented Reflection. It is a simple wrapper for the java.lang.reflect package.
jOOR's name is inspired by jOOQ, a fluent API for SQL building and execution.
Dependencies
None!
Simple example
// All examples assume the following static import: import static org.joor.Reflect.*; String world = on("java.lang.String") // Like Class.forName()
.create("Hello World") // Call most specific matching constructor
.call("substring", 6) // Call most specific matching substring() method
.call("toString")
// Call toString()
.get();
// Get the wrapped object, in this case a StringProxy abstraction
jOOR also gives access to the java.lang.reflect.Proxy API in a simple way:
public interface StringProxy {
String substring(int beginIndex);
}
String substring = on("java.lang.String")
.create("Hello World")
.as(StringProxy.class) // Create a proxy for the wrapped object
.substring(6);
// Call a proxy methodComparison with standard java.lang.reflect
jOOR code:
Employee[] employees = on(department).call("getEmployees").get();
for (Employee employee : employees) {
Street street = on(employee).call("getAddress").call("getStreet").get();
System.out.println(street);
}
The same example with normal reflection in Java:
try {
Method m1 = department.getClass().getMethod("getEmployees");
Employee employees = (Employee[]) m1.invoke(department);
for (Employee employee : employees) {
Method m2 = employee.getClass().getMethod("getAddress");
Address address = (Address) m2.invoke(employee);
Method m3 = address.getClass().getMethod("getStreet");
Street street = (Street) m3.invoke(address);
System.out.println(street);
}
}
// There are many checked exceptions that you are likely to ignore anyway catch (Exception ignore) {
// ... or maybe just wrap in your preferred runtime exception:
throw new RuntimeException(e);
}
Similar projects
Everyday Java reflection with a fluent interface:
Reflection modelled as XPath (quite interesting!)