Package in.co.akshitbansal.springwebquery.util

Class ReflectionUtil

java.lang.Object
in.co.akshitbansal.springwebquery.util.ReflectionUtil
public class ReflectionUtil extends Object
Utility class for performing reflection-based operations on entity classes.

This class provides methods for resolving fields from dot-separated paths, handling inheritance hierarchies, and unwrapping container types (arrays and collections).

  • Constructor Details

    • ReflectionUtil

      public ReflectionUtil()

  • Method Details

    • resolveField

      public static Field resolveField(Class<?> type, String name)
      Resolves a Field for the given dot-separated field path, starting from the supplied root type and traversing the type hierarchy and container types as needed.

      The resolution rules are:

      • Each path segment is resolved using getDeclaredField while walking up the superclass hierarchy.
      • If a resolved field is an array, traversal continues with its component type.
      • If a resolved field is a Collection, traversal continues with the collection's generic element type.
      • Only the last field in the path is returned.

      Examples: 

      
 resolveField(User.class, "name.first");
 resolveField(Order.class, "items.product.id");
 resolveField(Foo.class, "values"); // List<List<String>> resolves to List

      This method performs structural type resolution only. It does not access or inspect runtime values.

      Parameters:
      type - the root class from which resolution starts
      name - a dot-separated field path (e.g. "a.b.c")
      Returns:
      the Field corresponding to the last segment in the path
      Throws:
      RuntimeException - if any segment of the path cannot be resolved
      UnsupportedOperationException - if an intermediate collection type does not expose resolvable generic information