Implement new BeanPropertyDefinition.getAliases() method (#4336)

Author: JooHyukKim

src/main/java/com/fasterxml/jackson/databind/introspect/BeanPropertyDefinition.java

@@ -1,6 +1,8 @@
 package com.fasterxml.jackson.databind.introspect;
 
+import java.util.Collections;
 import java.util.Iterator;
+import java.util.List;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 
@@ -284,4 +286,15 @@ public String findReferenceName() {
      * @since 2.5
      */
     public abstract JsonInclude.Value findInclusion();
+
+    /**
+     * Method for finding all aliases of the property, if any.
+     *
+     * @return {@code List} of aliases, if any; never null (empty list if no aliases found)
+     *
+     * @since 2.17
+     */
+    public List<PropertyName> findAliases() {
+        return Collections.emptyList();
+    }
 }

src/main/java/com/fasterxml/jackson/databind/introspect/POJOPropertyBuilder.java

@@ -843,6 +843,19 @@ public JsonInclude.Value findInclusion() {
         return (v == null) ? JsonInclude.Value.empty() : v;
     }
 
+    // since 2.17
+    @Override
+    public List<PropertyName> findAliases() {
+        AnnotatedMember ann = getPrimaryMember();
+        if (ann != null) {
+            List<PropertyName> propertyNames = _annotationIntrospector.findPropertyAliases(ann);
+            if (propertyNames != null) {
+                return propertyNames;
+            }
+        }
+        return Collections.emptyList();
+    }
+
     public JsonProperty.Access findAccess() {
         return fromMemberAnnotationsExcept(new WithMember<JsonProperty.Access>() {
             @Override

src/main/java/com/fasterxml/jackson/databind/util/SimpleBeanPropertyDefinition.java

@@ -2,6 +2,7 @@
 
 import java.util.Collections;
 import java.util.Iterator;
+import java.util.List;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 
@@ -218,6 +219,18 @@ public JsonInclude.Value findInclusion() {
         return _inclusion;
     }
 
+    @Override // since 2.17
+    public List<PropertyName> findAliases() {
+        AnnotatedMember ann = getPrimaryMember();
+        if (ann != null) {
+            List<PropertyName> propertyNames = _annotationIntrospector.findPropertyAliases(ann);
+            if (propertyNames != null) {
+                return propertyNames;
+            }
+        }
+        return Collections.emptyList();
+    }
+
     /*
     /**********************************************************
     /* Access to accessors (fields, methods etc)