Package com.google.common.reflect

Class Reflection

  • @Beta
public final class Reflection
extends java.lang.Object
    Static utilities relating to Java reflection.
    Since:
    12.0

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.String getPackageName​(java.lang.Class<?> clazz)
      Returns the package name of clazz according to the Java Language Specification (section 6.7).
      static java.lang.String getPackageName​(java.lang.String classFullName)
      Returns the package name of classFullName according to the Java Language Specification (section 6.7).
      static void initialize​(java.lang.Class<?>... classes)
      Ensures that the given classes are initialized, as described in JLS Section 12.4.2.
      static <T> T newProxy​(java.lang.Class<T> interfaceType, java.lang.reflect.InvocationHandler handler)
      Returns a proxy instance that implements interfaceType by dispatching method invocations to handler.

      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Method Detail

      • getPackageName

        public static java.lang.String getPackageName​(java.lang.Class<?> clazz)
        Returns the package name of clazz according to the Java Language Specification (section 6.7). Unlike Class.getPackage(), this method only parses the class name, without attempting to define the Package and hence load files.

      • getPackageName

        public static java.lang.String getPackageName​(java.lang.String classFullName)
        Returns the package name of classFullName according to the Java Language Specification (section 6.7). Unlike Class.getPackage(), this method only parses the class name, without attempting to define the Package and hence load files.

      • initialize

        public static void initialize​(java.lang.Class<?>... classes)
        Ensures that the given classes are initialized, as described in JLS Section 12.4.2.

        WARNING: Normally it's a smell if a class needs to be explicitly initialized, because static state hurts system maintainability and testability. In cases when you have no choice while inter-operating with a legacy framework, this method helps to keep the code less ugly.

        Throws:
        java.lang.ExceptionInInitializerError - if an exception is thrown during initialization of a class

      • newProxy

        public static <T> T newProxy​(java.lang.Class<T> interfaceType,
                             java.lang.reflect.InvocationHandler handler)
        Returns a proxy instance that implements interfaceType by dispatching method invocations to handler. The class loader of interfaceType will be used to define the proxy class. To implement multiple interfaces or specify a class loader, use Proxy.newProxyInstance(java.lang.ClassLoader, java.lang.Class<?>[], java.lang.reflect.InvocationHandler).
        Throws:
        java.lang.IllegalArgumentException - if interfaceType does not specify the type of a Java interface