feat: metadata access support for table

Author: shuxu.li

src/iceberg/table.cc

@@ -98,7 +98,7 @@ const std::unordered_map<std::string, std::string>& Table::properties() const {
 
 const std::string& Table::location() const { return metadata_->location; }
 
-std::shared_ptr<Snapshot> Table::CurrentSnapshot() const {
+std::shared_ptr<Snapshot> Table::current_snapshot() const {
   std::call_once(init_snapshot_once_, [this]() {
     auto snapshot = metadata_->Snapshot();
     if (snapshot.has_value()) {

src/iceberg/table.h

@@ -84,7 +84,7 @@ class ICEBERG_EXPORT Table {
   const std::string& location() const;
 
   /// \brief Return the table's current snapshot, return null if not found
-  std::shared_ptr<Snapshot> CurrentSnapshot() const;
+  std::shared_ptr<Snapshot> current_snapshot() const;
 
   /// \brief Get the snapshot of this table with the given id, or null if there is no
   /// matching snapshot

test/table_test.cc

@@ -105,7 +105,7 @@ TEST(Table, TableV2) {
   // Check snapshot
   auto snapshots = table.snapshots();
   ASSERT_EQ(2UL, snapshots.size());
-  auto snapshot = table.CurrentSnapshot();
+  auto snapshot = table.current_snapshot();
   ASSERT_TRUE(snapshot != nullptr);
   auto invalid_snapshot_id = 9999;
   snapshot = table.SnapshotById(invalid_snapshot_id);