Package org.springframework.core

Class BridgeMethodResolver

java.lang.Object
org.springframework.core.BridgeMethodResolver
public final class BridgeMethodResolver extends Object
Helper for resolving synthetic bridge Methods to the Method being bridged.

Given a synthetic bridge Method returns the Method being bridged. A bridge method may be created by the compiler when extending a parameterized type whose methods have parameterized arguments. During runtime invocation the bridge Method may be invoked and/or used via reflection. When attempting to locate annotations on Methods, it is wise to check for bridge Methods as appropriate and find the bridged Method.

See The Java Language Specification for more details on the use of bridge methods.

Since:
2.0
Author:
Rob Harrop, Juergen Hoeller, Phillip Webb

  • Method Details

    • findBridgedMethod

      public static Method findBridgedMethod(Method bridgeMethod)
      Find the local original method for the supplied bridge Method.

      It is safe to call this method passing in a non-bridge Method instance. In such a case, the supplied Method instance is returned directly to the caller. Callers are not required to check for bridging before calling this method.

      Parameters:
      bridgeMethod - the method to introspect against its declaring class
      Returns:
      the original method (either the bridged method or the passed-in method if no more specific one could be found)
      See Also:

    • getMostSpecificMethod

      public static Method getMostSpecificMethod(Method bridgeMethod, @Nullable Class<?> targetClass)
      Determine the most specific method for the supplied bridge Method in the given class hierarchy, even if not available on the local declaring class.

      This is effectively a combination of ClassUtils.getMostSpecificMethod(java.lang.reflect.Method, java.lang.Class<?>) and findBridgedMethod(java.lang.reflect.Method), resolving the original method even if no bridge method has been generated at the same class hierarchy level (a known difference between the Eclipse compiler and regular javac).

      Parameters:
      bridgeMethod - the method to introspect against the given target class
      targetClass - the target class to find methods on
      Returns:
      the original method (either the bridged method or the passed-in method if no more specific one could be found)
      Since:
      6.1.3
      See Also:

    • isVisibilityBridgeMethodPair

      public static boolean isVisibilityBridgeMethodPair(Method bridgeMethod, Method bridgedMethod)
      Compare the signatures of the bridge method and the method which it bridges. If the parameter and return types are the same, it is a 'visibility' bridge method introduced in Java 6 to fix https://bugs.openjdk.org/browse/JDK-6342411. See also https://stas-blogspot.blogspot.com/2010/03/java-bridge-methods-explained.html
      Returns:
      whether signatures match as described