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46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
/*
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* Copyright (C) 2015 Cloudius Systems, Ltd.
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*/
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#pragma once
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#include "atomic_cell.hh"
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#include "tombstone.hh"
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#include "keys.hh"
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class row_marker;
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// Guarantees:
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//
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// - any tombstones which affect cell's liveness are visited before that cell
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//
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// - rows are visited in ascending order with respect to their keys
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//
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// - row header (accept_row) is visited before that row's cells
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//
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// - row tombstones are visited in ascending order with respect to their key prefixes
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//
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// - cells in given row are visited in ascending order with respect to their column IDs
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//
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// - static row is visited before any clustered row
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//
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// - for each column in a row only one variant of accept_(static|row)_cell() is called, appropriate
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// for column's kind (atomic or collection).
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//
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class mutation_partition_visitor {
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public:
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virtual void accept_partition_tombstone(tombstone) = 0;
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virtual void accept_static_cell(column_id, atomic_cell_view) = 0;
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virtual void accept_static_cell(column_id, collection_mutation::view) = 0;
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virtual void accept_row_tombstone(clustering_key_prefix_view, tombstone) = 0;
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virtual void accept_row(clustering_key_view key, tombstone deleted_at, const row_marker& rm) = 0;
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virtual void accept_row_cell(column_id id, atomic_cell_view) = 0;
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virtual void accept_row_cell(column_id id, collection_mutation::view) = 0;
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};
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