Class DefineClassHelper


  • public class DefineClassHelper
    extends java.lang.Object
    Helper class for invoking ClassLoader.defineClass(String,byte[],int,int).
    Since:
    3.22
    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.lang.Class<?> toClass​(java.lang.String className, java.lang.ClassLoader loader, java.security.ProtectionDomain domain, byte[] bcode)
      Loads a class file by a given class loader.
      • Methods inherited from class java.lang.Object

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Method Detail

      • toClass

        public static java.lang.Class<?> toClass​(java.lang.String className,
                                                 java.lang.ClassLoader loader,
                                                 java.security.ProtectionDomain domain,
                                                 byte[] bcode)
                                          throws CannotCompileException
        Loads a class file by a given class loader.

        This first tries to use sun.misc.Unsafe to load a class. Then it tries to use a protected method in java.lang.ClassLoader via PrivilegedAction. Since the latter approach is not available any longer by default in Java 9 or later, the JVM argument --add-opens java.base/java.lang=ALL-UNNAMED must be given to the JVM. If this JVM argument cannot be given, toPublicClass(String,byte[]) should be used instead.

        Parameters:
        domain - if it is null, a default domain is used.
        Throws:
        CannotCompileException
        Since:
        3.22