程序包 org.apache.pulsar.common.util

类 Reflections

java.lang.Object

org.apache.pulsar.common.util.Reflections

public class Reflections
extends Object

Utils related to reflections.

构造器概要

构造器

构造器	说明
Reflections()

方法概要

修饰符和类型	方法	说明
static boolean	classExists(String fqcn)	Check if class exists.
static boolean	classExistsInJar(File jar, String fqcn)	Check if a class is in a jar.
static boolean	classImplementsIface(String fqcn, Class xface)	check if class implements interface.
static boolean	classInJarImplementsIface(File jar, String fqcn, Class xface)	check if a class implements an interface.
static Object	createInstance(String userClassName, File jar)
static <T> T	createInstance(String userClassName, Class<T> xface, ClassLoader classLoader)	Create an instance of userClassName using provided classLoader.
static Object	createInstance(String userClassName, ClassLoader classLoader)	Create an instance of userClassName using provided classLoader.
static Object	createInstance(String userClassName, ClassLoader classLoader, Object[] params, Class[] paramTypes)
static List<Field>	getAllFields(Class<?> type)
static Class	loadClass(String className, ClassLoader classLoader)	Load class to resolve array types.

从类继承的方法 java.lang.Object

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

构造器详细资料

Reflections

public Reflections()

方法详细资料

createInstance

public static <T> T createInstance(String userClassName,
 Class<T> xface,
 ClassLoader classLoader)

Create an instance of userClassName using provided classLoader. This instance should implement the provided interface xface.

参数:

userClassName - user class name

xface - the interface that the reflected instance should implement

classLoader - class loader to load the class.

返回:

the instance

createInstance

public static Object createInstance(String userClassName,
 ClassLoader classLoader)

Create an instance of userClassName using provided classLoader.

参数:

userClassName - user class name

classLoader - class loader to load the class.

返回:

the instance

createInstance

public static Object createInstance(String userClassName,
 ClassLoader classLoader,
 Object[] params,
 Class[] paramTypes)

createInstance

public static Object createInstance(String userClassName,
 File jar)

classExistsInJar

public static boolean classExistsInJar(File jar,
 String fqcn)

Check if a class is in a jar.

参数:

jar - location of the jar

fqcn - fully qualified class name to search for in jar

返回:

true if class can be loaded from jar and false if otherwise

classExists

public static boolean classExists(String fqcn)

Check if class exists.

参数:

fqcn - fully qualified class name to search for

返回:

true if class can be loaded from jar and false if otherwise

classInJarImplementsIface

public static boolean classInJarImplementsIface(File jar,
 String fqcn,
 Class xface)

check if a class implements an interface.

参数:

fqcn - fully qualified class name to search for in jar

xface - interface to check if implement

返回:

true if class from jar implements interface xface and false if otherwise

classImplementsIface

public static boolean classImplementsIface(String fqcn,
 Class xface)

check if class implements interface.

参数:

fqcn - fully qualified class name

xface - the interface the fqcn should implement

返回:

true if class implements interface xface and false if otherwise

loadClass

public static Class loadClass(String className,
 ClassLoader classLoader)
                       throws ClassNotFoundException

Load class to resolve array types.

参数:

className - class name

classLoader - class loader

返回:

loaded class

抛出:

ClassNotFoundException

getAllFields

public static List<Field> getAllFields(Class<?> type)