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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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class TableRollback:
    """Rollback table to instant by delegating to catalog.rollback_to."""

    def __init__(self, catalog, identifier):
        self._catalog = catalog
        self._identifier = identifier

    def rollback_to(self, instant, from_snapshot=None):
        """Rollback table to the given instant via catalog.

        Args:
            instant: The Instant (SnapshotInstant or TagInstant) to rollback to.
            from_snapshot: Optional snapshot ID. Success only occurs when the
                latest snapshot is this snapshot.

        Raises:
            RuntimeError: If the rollback fails.
        """
        try:
            self._catalog.rollback_to(self._identifier, instant, from_snapshot)
        except Exception as e:
            raise RuntimeError(
                "Failed to rollback table {}: {}".format(
                    self._identifier, e)) from e
