GitHub - jOOQ/jOOR: jOOR - Fluent Reflection in Java jOOR is a very simple fluen...
source link: https://github.com/jOOQ/jOOR
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README.md
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!
Download
For use with Java 9+
<dependency> <groupId>org.jooq</groupId> <artifactId>joor</artifactId> <version>0.9.7</version> </dependency>
For use with Java 8+
<dependency> <groupId>org.jooq</groupId> <artifactId>joor-java-8</artifactId> <version>0.9.7</version> </dependency>
For use with Java 6+
<dependency> <groupId>org.jooq</groupId> <artifactId>joor-java-6</artifactId> <version>0.9.7</version> </dependency>
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 String
Proxy 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 method
Runtime compilation of Java code
jOOR has an optional dependency on the java.compiler
module and simplifies access to javax.tools.JavaCompiler
through the following API:
Supplier<String> supplier = Reflect.compile( "com.example.HelloWorld", "package com.example;\n" + "class HelloWorld implements java.util.function.Supplier<String> {\n" + " public String get() {\n" + " return \"Hello World!\";\n" + " }\n" + "}\n").create().get(); // Prints "Hello World!" System.out.println(supplier.get());
Comparison 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
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