Hacking.

Author: mp911de

src/main/java/org/springframework/data/mapping/ComposedPropertyPath.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2025 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.mapping;
+
+import java.util.Iterator;
+import java.util.List;
+
+import org.springframework.data.util.TypeInformation;
+
+record ComposedPropertyPath<T, M, R>(TypedPropertyPath<T, M> first,
+		TypedPropertyPath<M, R> second) implements TypedPropertyPath<T, R> {
+
+	@Override
+	public R get(T obj) {
+		M intermediate = first.get(obj);
+		return intermediate != null ? second.get(intermediate) : null;
+	}
+
+	@Override
+	public TypeInformation<?> getOwningType() {
+		return first.getOwningType();
+	}
+
+	@Override
+	public String getSegment() {
+		return first().getSegment();
+	}
+
+	@Override
+	public PropertyPath getLeafProperty() {
+		return second.getLeafProperty();
+	}
+
+	@Override
+	public TypeInformation<?> getTypeInformation() {
+		return first.getTypeInformation();
+	}
+
+	@Override
+	public PropertyPath next() {
+		return second;
+	}
+
+	@Override
+	public boolean hasNext() {
+		return true;
+	}
+
+	@Override
+	public String toDotPath() {
+		return first.toDotPath() + "." + second.toDotPath();
+	}
+
+	@Override
+	public Iterator<PropertyPath> iterator() {
+		return List.<PropertyPath> of(this, second).iterator();
+	}
+
+}

src/main/java/org/springframework/data/mapping/PropertyPath.java

@@ -35,6 +35,20 @@
  */
 public interface PropertyPath extends Streamable<PropertyPath> {
 
+	/**
+	 * Syntax sugar to create a {@link TypedPropertyPath} from an existing one, ideal for method handles.
+	 *
+	 * @param propertyPath
+	 * @return
+	 * @param <T> owning type.
+	 * @param <R> property type.
+	 * @since xxx
+	 */
+	public static <T, R> TypedPropertyPath<T, R> of(TypedPropertyPath<T, R> propertyPath) {
+		PropertyPathExtractor.getPropertyPathInformation(propertyPath);
+		return propertyPath;
+	}
+
 	/**
 	 * Returns the owning type of the {@link PropertyPath}.
 	 *