Package org.codehaus.gmavenplus.util

Class ReflectionUtils

java.lang.Object
org.codehaus.gmavenplus.util.ReflectionUtils
public class ReflectionUtils extends Object
Inspired heavily by Spring's ReflectionUtils.
Since:
1.0-beta-1

  • Constructor Details

    • ReflectionUtils

      private ReflectionUtils()

  • Method Details

    • findConstructor

      public static Constructor<?> findConstructor(Class<?> clazz, Class<?>... paramTypes)
      Attempt to find a Constructor on the supplied class with the supplied parameter types. Searches all superclasses up to Object.
      Parameters:
      clazz - The class to introspect
      paramTypes - The parameter types of the method (may be null to indicate any signature)
      Returns:
      The Constructor object

    • findField

      public static Field findField(Class<?> clazz, String name, Class<?> type)
      Attempt to find a field on the supplied Class with the supplied name and/or type. Searches all superclasses up to Object.
      Parameters:
      clazz - The class to introspect
      name - The name of the field (may be null if type is specified)
      type - The type of the field (may be null if name is specified)
      Returns:
      The corresponding Field object

    • findMethod

      public static Method findMethod(Class<?> clazz, String name, Class<?>... paramTypes)
      Attempt to find a Method on the supplied class with the supplied name and parameter types. Searches all superclasses up to Object.
      Parameters:
      clazz - The class to introspect
      name - The name of the method
      paramTypes - The parameter types of the method (may be null to indicate any signature)
      Returns:
      The Method object

    • getEnumValue

      public static Object getEnumValue(Class<?> clazz, String valueName)
      Find and return the specified value from the specified enum class.
      Parameters:
      clazz - The enum class to introspect
      valueName - The name of the enum value to get
      Returns:
      The enum value

    • getField

      public static Object getField(Field field, Object target) throws IllegalAccessException
      Get the field represented by the supplied field object on the specified target object. In accordance with Field.get(Object) semantics, the returned value is automatically wrapped if the underlying field has a primitive type.
      Parameters:
      field - The field to get
      target - The target object from which to get the field
      Returns:
      The field's current value
      Throws:
      IllegalAccessException - when unable to access the specified field because access modifiers prevent it

    • getStaticField

      public static Object getStaticField(Field field) throws IllegalAccessException
      Get the field represented by the supplied field object on the specified target object. In accordance with Field.get(Object) semantics, the returned value is automatically wrapped if the underlying field has a primitive type.
      Parameters:
      field - The field to get
      Returns:
      The field's current value
      Throws:
      IllegalAccessException - when unable to access the specified field because access modifiers prevent it

    • invokeConstructor

      public static Object invokeConstructor(Constructor<?> constructor, Object... args) throws InvocationTargetException, IllegalAccessException, InstantiationException
      Invoke the specified Constructor with the supplied arguments.
      Parameters:
      constructor - The method to invoke
      args - The invocation arguments (may be null)
      Returns:
      The invocation result, if any
      Throws:
      IllegalAccessException - when unable to access the specified constructor because access modifiers prevent it
      InvocationTargetException - when a reflection invocation fails
      InstantiationException - when an instantiation fails

    • invokeMethod

      public static Object invokeMethod(Method method, Object target, Object... args) throws InvocationTargetException, IllegalAccessException
      Invoke the specified Method against the supplied target object with the supplied arguments. The target object can be null when invoking a static Method.
      Parameters:
      method - The method to invoke
      target - The target object to invoke the method on
      args - The invocation arguments (may be null)
      Returns:
      The invocation result, if any
      Throws:
      IllegalAccessException - when unable to access the specified method because access modifiers prevent it
      InvocationTargetException - when a reflection invocation fails

    • invokeStaticMethod

      public static Object invokeStaticMethod(Method method, Object... args) throws InvocationTargetException, IllegalAccessException
      Invoke the specified static Method with the supplied arguments.
      Parameters:
      method - The method to invoke
      args - The invocation arguments (may be null)
      Returns:
      The invocation result, if any
      Throws:
      IllegalAccessException - when unable to access the specified method because access modifiers prevent it
      InvocationTargetException - when a reflection invocation fails

    • getDeclaredMethods

      private static Method[] getDeclaredMethods(Class<?> clazz)
      This variant retrieves Class.getDeclaredMethods() from a local cache in order to avoid the JVM's SecurityManager check and defensive array copying. In addition, it also includes Java 8 default methods from locally implemented interfaces, since those are effectively to be treated just like declared methods.
      Parameters:
      clazz - the class to introspect
      Returns:
      the cached array of methods
      See Also:

    • findConcreteMethodsOnInterfaces

      private static List<Method> findConcreteMethodsOnInterfaces(Class<?> clazz)