jerryshao commented on code in PR #7796:
URL: https://github.com/apache/gravitino/pull/7796#discussion_r2253513453
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core/src/main/java/org/apache/gravitino/SupportsRelationOperations.java:
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@@ -76,6 +77,30 @@ <E extends Entity & HasIdentifier> List<E>
listEntitiesByRelation(
Type relType, NameIdentifier nameIdentifier, Entity.EntityType
identType, boolean allFields)
throws IOException;
+ /**
+ * Get a specific entity that is related to a given source entity.
+ *
+ * <p>For example, this can be used to get a specific policy that is
directly associated with a
+ * metadata object.
+ *
+ * @param <E> The type of the entity to be returned.
+ * @param relType The type of relation.
+ * @param srcIdentifier The identifier of the source entity in the relation
(e.g., a metadata
+ * object).
+ * @param srcType The type of the source entity.
+ * @param entityIdent The identifier of the target entity to retrieve (e.g.,
a policy).
+ * @return The specific entity that is related to the source entity.
+ * @throws IOException If a storage-related error occurs.
+ * @throws NoSuchEntityException If the source entity or the target related
entity does not exist,
+ * or if the relation does not exist.
+ */
+ <E extends Entity & HasIdentifier> E getEntityByRelation(
+ Type relType,
+ NameIdentifier srcIdentifier,
+ Entity.EntityType srcType,
+ NameIdentifier entityIdent)
Review Comment:
Maybe we can rename to `destEntityIdent`?
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