程序包 net.apexes.commons.lang

类 Reflect

java.lang.Object
net.apexes.commons.lang.Reflect
public class Reflect extends Object
A wrapper for an Object or Class upon which reflective calls can be made.

An example of using Reflect is 


 // Wrap an Object / Class / class name with the on() method:
 Reflect.on("java.lang.String")
 // Invoke constructors using the create() method:
 .create("Hello World")
 // Invoke methods using the call() method:
 .call("toString")
 // Retrieve the wrapped object
作者:
Lukas Eder

  • 方法详细资料

    • on

      public static Reflect on(String name) throws ReflectException
      Wrap a class name.

      This is the same as calling on(Class.forName(name))

      参数:
      name - A fully qualified class name
      返回:
      A wrapped class object, to be used for further reflection.
      抛出:
      ReflectException - If any reflection exception occurred.
      另请参阅:

    • on

      public static Reflect on(Class<?> clazz)
      Wrap a class.

      Use this when you want to access static fields and methods on a Class object, or as a basis for constructing objects of that class using create(Object...)

      参数:
      clazz - The class to be wrapped
      返回:
      A wrapped class object, to be used for further reflection.

    • on

      public static Reflect on(Object object)
      Wrap an object.

      Use this when you want to access instance fields and methods on any Object

      参数:
      object - The object to be wrapped
      返回:
      A wrapped object, to be used for further reflection.

    • accessible

      public static <T extends AccessibleObject> T accessible(T accessible)
      Conveniently render an AccessibleObject accessible
      参数:
      accessible - The object to render accessible
      返回:
      The argument object rendered accessible

    • get

      public <T> T get()
      Get the wrapped object
      类型参数:
      T - A convenience generic parameter for automatic unsafe casting

    • set

      public Reflect set(String name, Object value) throws ReflectException
      Set a field value.

      This is roughly equivalent to Field.set(Object, Object). If the wrapped object is a Class, then this will set a value to a static member field. If the wrapped object is any other Object, then this will set a value to an instance member field.

      参数:
      name - The field name
      value - The new field value
      返回:
      The same wrapped object, to be used for further reflection.
      抛出:
      ReflectException - If any reflection exception occurred.

    • get

      public <T> T get(String name) throws ReflectException
      Get a field value.

      This is roughly equivalent to Field.get(Object). If the wrapped object is a Class, then this will get a value from a static member field. If the wrapped object is any other Object, then this will get a value from an instance member field.

      If you want to "navigate" to a wrapped version of the field, use field(String) instead.

      参数:
      name - The field name
      返回:
      The field value
      抛出:
      ReflectException - If any reflection exception occurred.
      另请参阅:

    • field

      public Reflect field(String name) throws ReflectException
      Get a wrapped field.

      This is roughly equivalent to Field.get(Object). If the wrapped object is a Class, then this will wrap a static member field. If the wrapped object is any other Object, then this wrap an instance member field.

      参数:
      name - The field name
      返回:
      The wrapped field
      抛出:
      ReflectException - If any reflection exception occurred.

    • fields

      public Map<String,Reflect> fields()
      Get a Map containing field names and wrapped values for the fields' values.

      If the wrapped object is a Class, then this will return static fields. If the wrapped object is any other Object, then this will return instance fields.

      These two calls are equivalent 

       on(object).field("myField");
 on(object).fields().get("myField");
      返回:
      A map containing field names and wrapped values.

    • call

      public Reflect call(String name) throws ReflectException
      Call a method by its name.

      This is a convenience method for calling call(name, new Object[0])

      参数:
      name - The method name
      返回:
      The wrapped method result or the same wrapped object if the method returns void, to be used for further reflection.
      抛出:
      ReflectException - If any reflection exception occurred.
      另请参阅:

    • call

      public Reflect call(String name, Object... args) throws ReflectException
      Call a method by its name.

      This is roughly equivalent to Method.invoke(Object, Object...). If the wrapped object is a Class, then this will invoke a static method. If the wrapped object is any other Object, then this will invoke an instance method.

      Just like Method.invoke(Object, Object...), this will try to wrap primitive types or unwrap primitive type wrappers if applicable. If several methods are applicable, by that rule, the first one encountered is called. i.e. when calling 

       on(...).call("method", 1, 1);
      The first of the following methods will be called: 
       public void method(int param1, Integer param2);
 public void method(Integer param1, int param2);
 public void method(Number param1, Number param2);
 public void method(Number param1, Object param2);
 public void method(int param1, Object param2);
      参数:
      name - The method name
      args - The method arguments
      返回:
      The wrapped method result or the same wrapped object if the method returns void, to be used for further reflection.
      抛出:
      ReflectException - If any reflection exception occurred.

    • create

      public Reflect create() throws ReflectException
      Call a constructor.

      This is a convenience method for calling create(new Object[0])

      返回:
      The wrapped new object, to be used for further reflection.
      抛出:
      ReflectException - If any reflection exception occurred.
      另请参阅:

    • create

      public Reflect create(Object... args) throws ReflectException
      Call a constructor.

      This is roughly equivalent to Constructor.newInstance(Object...). If the wrapped object is a Class, then this will create a new object of that class. If the wrapped object is any other Object, then this will create a new object of the same type.

      Just like Constructor.newInstance(Object...), this will try to wrap primitive types or unwrap primitive type wrappers if applicable. If several constructors are applicable, by that rule, the first one encountered is called. i.e. when calling 

       on(C.class).create(1, 1);
      The first of the following constructors will be applied: 
       public C(int param1, Integer param2);
 public C(Integer param1, int param2);
 public C(Number param1, Number param2);
 public C(Number param1, Object param2);
 public C(int param1, Object param2);
      参数:
      args - The constructor arguments
      返回:
      The wrapped new object, to be used for further reflection.
      抛出:
      ReflectException - If any reflection exception occurred.

    • as

      public <P> P as(Class<P> proxyType)
      Create a proxy for the wrapped object allowing to typesafely invoke methods on it using a custom interface
      参数:
      proxyType - The interface type that is implemented by the proxy
      返回:
      A proxy for the wrapped object

    • hashCode

      public int hashCode()
      覆盖:
      hashCode 在类中 Object

    • equals

      public boolean equals(Object obj)
      覆盖:
      equals 在类中 Object

    • toString

      public String toString()
      覆盖:
      toString 在类中 Object

    • type

      public Class<?> type()
      Get the type of the wrapped object.
      另请参阅:

    • getInvokeClassName

      public static String getInvokeClassName()
      获取调用本类中方法的其他类名
      返回: