org.apache.shiro.util

Class ClassUtils


  • public class ClassUtils
extends Object
    Utility method library used to conveniently interact with Classes, such as acquiring them from the application ClassLoaders and instantiating Objects from them.
    Since:
    0.1

    • Constructor Detail

      • ClassUtils

        public ClassUtils()

    • Method Detail

      • getResourceAsStream

        public static InputStream getResourceAsStream(String name)
        Returns the specified resource by checking the current thread's context class loader, then the current ClassLoader ( ClassUtils.class.getClassLoader()), then the system/application ClassLoader ( ClassLoader.getSystemClassLoader(), in that order, using getResourceAsStream(name).
        Parameters:
        name - the name of the resource to acquire from the classloader(s).
        Returns:
        the InputStream of the resource found, or null if the resource cannot be found from any of the three mentioned ClassLoaders.
        Since:
        0.9

      • forName

        public static Class forName(String fqcn)
                     throws UnknownClassException
        Attempts to load the specified class name from the current thread's context class loader, then the current ClassLoader ( ClassUtils.class.getClassLoader()), then the system/application ClassLoader ( ClassLoader.getSystemClassLoader(), in that order. If any of them cannot locate the specified class, an UnknownClassException is thrown (our RuntimeException equivalent of the JRE's ClassNotFoundException.
        Parameters:
        fqcn - the fully qualified class name to load
        Returns:
        the located class
        Throws:
        UnknownClassException - if the class cannot be found.

      • isAvailable

        public static boolean isAvailable(String fullyQualifiedClassName)

      • newInstance

        public static Object newInstance(String fqcn)

      • newInstance

        public static Object newInstance(Class clazz)