Convert sets to lists

Signed-off-by: Darshit Chanpura <[email protected]>

server/src/main/java/org/opensearch/accesscontrol/resources/ShareWith.java

@@ -16,8 +16,8 @@
 import org.opensearch.core.xcontent.XContentParser;
 
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
+import java.util.HashSet;
+import java.util.Set;
 
 /**
  * This class contains information about whom a resource is shared with and at what scope.
@@ -39,17 +39,17 @@
  */
 public class ShareWith implements ToXContentFragment, NamedWriteable {
 
-    private final List<SharedWithScope> sharedWithScopes;
+    private final Set<SharedWithScope> sharedWithScopes;
 
-    public ShareWith(List<SharedWithScope> sharedWithScopes) {
+    public ShareWith(Set<SharedWithScope> sharedWithScopes) {
         this.sharedWithScopes = sharedWithScopes;
     }
 
     public ShareWith(StreamInput in) throws IOException {
-        this.sharedWithScopes = in.readList(SharedWithScope::new);
+        this.sharedWithScopes = in.readSet(SharedWithScope::new);
     }
 
-    public List<SharedWithScope> getSharedWithScopes() {
+    public Set<SharedWithScope> getSharedWithScopes() {
         return sharedWithScopes;
     }
 
@@ -65,7 +65,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
     }
 
     public static ShareWith fromXContent(XContentParser parser) throws IOException {
-        List<SharedWithScope> sharedWithScopes = new ArrayList<>();
+        Set<SharedWithScope> sharedWithScopes = new HashSet<>();
 
         if (parser.currentToken() != XContentParser.Token.START_OBJECT) {
             parser.nextToken();
@@ -90,7 +90,7 @@ public String getWriteableName() {
 
     @Override
     public void writeTo(StreamOutput out) throws IOException {
-        out.writeList(sharedWithScopes);
+        out.writeCollection(sharedWithScopes);
     }
 
     @Override

server/src/main/java/org/opensearch/plugins/NoOpResourceAccessControlPlugin.java

@@ -12,8 +12,8 @@
 import org.opensearch.accesscontrol.resources.ResourceSharing;
 import org.opensearch.accesscontrol.resources.ShareWith;
 
-import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * This plugin class defines a no-op implementation of Resource Plugin.
@@ -29,10 +29,10 @@ public class NoOpResourceAccessControlPlugin implements ResourceAccessControlPlu
      * @return empty list
      */
     @Override
-    public List<String> listAccessibleResourcesInPlugin(String systemIndexName) {
+    public Set<String> listAccessibleResourcesInPlugin(String systemIndexName) {
         // returns an empty list since security plugin is disabled
         // TODO: check whether this should return all entries in the given index
-        return List.of();
+        return Set.of();
     }
 
     /**
@@ -68,8 +68,8 @@ public ResourceSharing shareWith(String resourceId, String systemIndexName, Shar
     public ResourceSharing revokeAccess(
         String resourceId,
         String systemIndexName,
-        Map<EntityType, List<String>> revokeAccess,
-        List<String> scopes
+        Map<EntityType, Set<String>> revokeAccess,
+        Set<String> scopes
     ) {
         return null;
     }

server/src/main/java/org/opensearch/plugins/ResourceAccessControlPlugin.java

@@ -12,8 +12,8 @@
 import org.opensearch.accesscontrol.resources.ResourceSharing;
 import org.opensearch.accesscontrol.resources.ShareWith;
 
-import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * This interface determines presence of security plugin in the cluster.
@@ -31,9 +31,9 @@ public interface ResourceAccessControlPlugin {
     /**
      * Returns all accessible resources for current user for a given system .
      *
-     * @return list of {@link ResourceSharing} items accessible by current user.
+     * @return set of {@link ResourceSharing} items accessible by current user.
      */
-    List<String> listAccessibleResourcesInPlugin(String systemIndex);
+    Set<String> listAccessibleResourcesInPlugin(String systemIndex);
 
     /**
      * Checks whether current user has permission to given resource.
@@ -64,12 +64,7 @@ public interface ResourceAccessControlPlugin {
      * @param scopes Scopes to be checked for revoking access. If empty, all scopes will be checked.
      * @return the updated ResourceSharing record
      */
-    ResourceSharing revokeAccess(
-        String resourceId,
-        String systemIndexName,
-        Map<EntityType, List<String>> revokeAccess,
-        List<String> scopes
-    );
+    ResourceSharing revokeAccess(String resourceId, String systemIndexName, Map<EntityType, Set<String>> revokeAccess, Set<String> scopes);
 
     /**
      * Deletes an entry from .resource_sharing index