Java: Make the generics of the Options interfaces more strict (#5461)

Summary:
Make the generics of the Options interfaces more strict so they are usable in a Kotlin Multiplatform expect/actual typealias implementation without causing a Violation of Finite Bound Restriction.

This fix would enable the creation of a generic Kotlin multiplatform library by just typealiasing the JVM implementation to the current Java implementation.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5461

Differential Revision: D15903288

Pulled By: sagar0

fbshipit-source-id: 75e83fdf5d2fcede40744a17e767563d6a4b0696

java/src/main/java/org/rocksdb/AdvancedColumnFamilyOptionsInterface.java

@@ -14,7 +14,7 @@ import java.util.List;
  * Taken from include/rocksdb/advanced_options.h
  */
 public interface AdvancedColumnFamilyOptionsInterface
-    <T extends AdvancedColumnFamilyOptionsInterface> {
+    <T extends AdvancedColumnFamilyOptionsInterface<T>> {
 
   /**
    * The minimum number of write buffers that will be merged together

java/src/main/java/org/rocksdb/AdvancedMutableColumnFamilyOptionsInterface.java

@@ -12,7 +12,7 @@ package org.rocksdb;
  * and MutableCFOptions in util/cf_options.h
  */
 public interface AdvancedMutableColumnFamilyOptionsInterface
-    <T extends AdvancedMutableColumnFamilyOptionsInterface> {
+    <T extends AdvancedMutableColumnFamilyOptionsInterface<T>> {
 
   /**
    * The maximum number of write buffers that are built up in memory.

java/src/main/java/org/rocksdb/ColumnFamilyOptionsInterface.java

@@ -6,7 +6,7 @@
 package org.rocksdb;
 
 public interface ColumnFamilyOptionsInterface
-    <T extends ColumnFamilyOptionsInterface>
+    <T extends ColumnFamilyOptionsInterface<T>>
         extends AdvancedColumnFamilyOptionsInterface<T> {
 
   /**

java/src/main/java/org/rocksdb/DBOptionsInterface.java

@@ -8,7 +8,7 @@ package org.rocksdb;
 import java.util.Collection;
 import java.util.List;
 
-public interface DBOptionsInterface<T extends DBOptionsInterface> {
+public interface DBOptionsInterface<T extends DBOptionsInterface<T>> {
 
   /**
    * Use this if your DB is very small (like under 1GB) and you don't want to

java/src/main/java/org/rocksdb/MutableColumnFamilyOptionsInterface.java

@@ -6,7 +6,7 @@
 package org.rocksdb;
 
 public interface MutableColumnFamilyOptionsInterface
-    <T extends MutableColumnFamilyOptionsInterface>
+    <T extends MutableColumnFamilyOptionsInterface<T>>
         extends AdvancedMutableColumnFamilyOptionsInterface<T> {
 
   /**

java/src/main/java/org/rocksdb/MutableDBOptionsInterface.java

@@ -1,7 +1,7 @@
 // Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 package org.rocksdb;
 
-public interface MutableDBOptionsInterface<T extends MutableDBOptionsInterface> {
+public interface MutableDBOptionsInterface<T extends MutableDBOptionsInterface<T>> {
 
   /**
    * Specifies the maximum number of concurrent background jobs (both flushes