Package org.basex.util

Class Reflect

java.lang.Object
org.basex.util.Reflect
public final class Reflect extends Object
This class assembles some reflection methods. Most exceptions are caught and replaced by a null value.
Author:
BaseX Team 2005-21, BSD License, Christian Gruen

  • Method Details

    • available

      public static boolean available(String pattern, Object... ext)
      Checks if the class specified by the pattern is available.
      Parameters:
      pattern - class pattern
      ext - optional extension
      Returns:
      result of check

    • find

      public static Class<?> find(String name)
      Caches and returns a reference to the specified class.
      Parameters:
      name - fully qualified class name
      Returns:
      reference, or null if the class is not found

    • forName

      public static Class<?> forName(String name) throws ClassNotFoundException
      Caches and returns a reference to the specified class, or throws an exception.
      Parameters:
      name - fully qualified class name
      Returns:
      class reference
      Throws:
      ClassNotFoundException - any exception or error

    • field

      public static Field field(Class<?> clazz, String name)
      Caches and returns a reference to the specified field or null.
      Parameters:
      clazz - class to search for the constructor
      name - field name
      Returns:
      reference or null if the field is not found

    • find

      public static Class<?> find(String pattern, Object... ext)
      Caches and returns a reference to the class specified by the pattern, or null.
      Parameters:
      pattern - class pattern
      ext - optional extension
      Returns:
      reference or null if the class is not found

    • find

      public static <O> Constructor<O> find(Class<O> clazz, Class<?>... types)
      Caches and returns a constructor by parameter types.
      Type Parameters:
      O - class type
      Parameters:
      clazz - class to search for the constructor
      types - constructor parameters
      Returns:
      constructor, or null if the constructor is not found

    • method

      public static Method method(Class<?> clazz, String name, Class<?>... types)
      Finds a public, protected or private method by name and parameter types.
      Parameters:
      clazz - class to search for the method
      name - method name
      types - method parameters
      Returns:
      method, or null if the method is not found

    • get

      public static <O> O get(Class<O> clazz)
      Returns a class instance.
      Type Parameters:
      O - type
      Parameters:
      clazz - class
      Returns:
      instance or null

    • get

      public static <O> O get(Constructor<O> clazz, Object... args)
      Returns a class instance or null.
      Type Parameters:
      O - class type
      Parameters:
      clazz - class
      args - arguments
      Returns:
      instance or null

    • invoke

      public static Object invoke(Method method, Object object, Object... args)
      Invokes the specified method.
      Parameters:
      method - method to run
      object - object (null for static methods)
      args - arguments
      Returns:
      result of method call or null

    • get

      public static Object get(Field field, Object object)
      Returns the value of a field.
      Parameters:
      field - field to access
      object - object (null for static methods)
      Returns:
      value of field