Autowiring of generic types

Includes revisions of MethodParameter and DependencyDescriptor (in particular towards a reference to the containing class). Also refines several ResolvableType method signatures.

Issue: SPR-9965

spring-messaging/src/main/java/org/springframework/messaging/handler/method/HandlerMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2013 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import java.lang.reflect.Method;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.core.BridgeMethodResolver;
 import org.springframework.core.MethodParameter;
@@ -72,15 +73,6 @@ public class HandlerMethod {
 		this.parameters = initMethodParameters();
 	}
 
-	private MethodParameter[] initMethodParameters() {
-		int count = this.bridgedMethod.getParameterTypes().length;
-		MethodParameter[] result = new MethodParameter[count];
-		for (int i = 0; i < count; i++) {
-			result[i] = new HandlerMethodParameter(i);
-		}
-		return result;
-	}
-
 	/**
 	 * Create an instance from a bean instance, method name, and parameter types.
 	 * @throws NoSuchMethodException when the method cannot be found
@@ -138,6 +130,16 @@ public class HandlerMethod {
 		this.parameters = handlerMethod.parameters;
 	}
 
+
+	private MethodParameter[] initMethodParameters() {
+		int count = this.bridgedMethod.getParameterTypes().length;
+		MethodParameter[] result = new MethodParameter[count];
+		for (int i = 0; i < count; i++) {
+			result[i] = new HandlerMethodParameter(i);
+		}
+		return result;
+	}
+
 	/**
 	 * Returns the bean for this handler method.
 	 */
@@ -157,9 +159,8 @@ public class HandlerMethod {
 	 * Note that if the bean type is a CGLIB-generated class, the original, user-defined class is returned.
 	 */
 	public Class<?> getBeanType() {
-		Class<?> clazz = (this.bean instanceof String)
-				? this.beanFactory.getType((String) this.bean) : this.bean.getClass();
-
+		Class<?> clazz = (this.bean instanceof String ?
+				this.beanFactory.getType((String) this.bean) : this.bean.getClass());
 		return ClassUtils.getUserClass(clazz);
 	}
 
@@ -223,12 +224,12 @@ public class HandlerMethod {
 	}
 
 	@Override
-	public boolean equals(Object o) {
-		if (this == o) {
+	public boolean equals(Object obj) {
+		if (this == obj) {
 			return true;
 		}
-		if (o != null && o instanceof HandlerMethod) {
-			HandlerMethod other = (HandlerMethod) o;
+		if (obj != null && obj instanceof HandlerMethod) {
+			HandlerMethod other = (HandlerMethod) obj;
 			return this.bean.equals(other.bean) && this.method.equals(other.method);
 		}
 		return false;
@@ -236,25 +237,26 @@ public class HandlerMethod {
 
 	@Override
 	public int hashCode() {
-		return 31 * this.bean.hashCode() + this.method.hashCode();
+		return this.bean.hashCode() * 31 + this.method.hashCode();
 	}
 
 	@Override
 	public String toString() {
-		return method.toGenericString();
+		return this.method.toGenericString();
 	}
 
+
 	/**
 	 * A MethodParameter with HandlerMethod-specific behavior.
 	 */
 	private class HandlerMethodParameter extends MethodParameter {
 
-		protected HandlerMethodParameter(int index) {
+		public HandlerMethodParameter(int index) {
 			super(HandlerMethod.this.bridgedMethod, index);
 		}
 
 		@Override
-		public Class<?> getDeclaringClass() {
+		public Class<?> getContainingClass() {
 			return HandlerMethod.this.getBeanType();
 		}
 
@@ -264,6 +266,7 @@ public class HandlerMethod {
 		}
 	}
 
+
 	/**
 	 * A MethodParameter for a HandlerMethod return type based on an actual return value.
 	 */
@@ -278,7 +281,7 @@ public class HandlerMethod {
 
 		@Override
 		public Class<?> getParameterType() {
-			return (this.returnValue != null) ? this.returnValue.getClass() : super.getParameterType();
+			return (this.returnValue != null ? this.returnValue.getClass() : super.getParameterType());
 		}
 	}