Add MethodParameter accessor to AotQueryMethodGenerationContext.

Closes #3334

Author: mp911de

src/main/java/org/springframework/data/repository/aot/generate/AotQueryMethodGenerationContext.java

@@ -21,6 +21,8 @@
 import java.util.List;
 
 import org.jspecify.annotations.Nullable;
+
+import org.springframework.core.MethodParameter;
 import org.springframework.core.ResolvableType;
 import org.springframework.core.annotation.MergedAnnotation;
 import org.springframework.core.annotation.MergedAnnotationSelectors;
@@ -65,6 +67,17 @@ MethodMetadata getTargetMethodMetadata() {
 		return targetMethodMetadata;
 	}
 
+	/**
+	 * Lookup the {@link MethodParameter} by its {@link MethodParameter#getParameterName()}.
+	 *
+	 * @param name the name of the parameter to look up.
+	 * @return the found method parameter or {@literal null} if no parameter with the given name exists.
+	 */
+	@Nullable
+	public MethodParameter getMethodParameter(String name) {
+		return getTargetMethodMetadata().getMethodParameters().get(name);
+	}
+
 	public RepositoryInformation getRepositoryInformation() {
 		return repositoryInformation;
 	}

src/main/java/org/springframework/data/repository/aot/generate/MethodMetadata.java

@@ -41,6 +41,7 @@
 class MethodMetadata {
 
 	private final Map<String, ParameterSpec> methodArguments = new LinkedHashMap<>();
+	private final Map<String, MethodParameter> methodParameters = new LinkedHashMap<>();
 	private final Map<String, String> localVariables = new LinkedHashMap<>();
 	private final ResolvableType actualReturnType;
 	private final ResolvableType returnType;
@@ -66,6 +67,7 @@ private void initParameters(RepositoryInformation repositoryInformation, Method
 			TypeName parameterType = TypeName.get(resolvableParameterType.getType());
 
 			addParameter(ParameterSpec.builder(parameterType, methodParameter.getParameterName()).build());
+			methodParameters.put(methodParameter.getParameterName(), methodParameter);
 		}
 	}
 
@@ -85,6 +87,10 @@ Map<String, ParameterSpec> getMethodArguments() {
 		return methodArguments;
 	}
 
+	Map<String, MethodParameter> getMethodParameters() {
+		return methodParameters;
+	}
+
 	@Nullable
 	String getParameterName(int position) {