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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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 * Unless required by applicable law or agreed to in writing, software
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package org.apache.cassandra.db.rows;

import org.apache.cassandra.config.ColumnDefinition;
import org.apache.cassandra.db.*;

Interface that allows to act on the result of merging multiple rows. More precisely, given N rows and the result of merging them, one can call Rows.diff(RowDiffListener, Row, Row...) with a RowDiffListener and that listener will be informed for each input row of the diff between that input and merge row. /**
 * Interface that allows to act on the result of merging multiple rows.
 *
 * More precisely, given N rows and the result of merging them, one can call {@link Rows#diff(RowDiffListener, Row, Row...)}
 * with a {@code RowDiffListener} and that listener will be informed for each input row of the diff between
 * that input and merge row.
 */
public interface RowDiffListener
{
    
Called for the row primary key liveness info of input i. 
Params:
i – the input row from which original is from.
clustering – the clustering for the row that is merged.
merged – the primary key liveness info of the merged row. Will be null if input i had a LivenessInfo, but the merged result don't (i.e. the original info has been shadowed/deleted).
original – the primary key liveness info of input i. May be null if input i has not primary key liveness info (i.e. it has LivenessInfo.NONE) but the merged result has./**
     * Called for the row primary key liveness info of input {@code i}.
     *
     * @param i the input row from which {@code original} is from.
     * @param clustering the clustering for the row that is merged.
     * @param merged the primary key liveness info of the merged row. Will be {@code null} if input {@code i} had
     * a {@code LivenessInfo}, but the merged result don't (i.e. the original info has been shadowed/deleted).
     * @param original the primary key liveness info of input {@code i}. May be {@code null} if input {@code i}
     * has not primary key liveness info (i.e. it has {@code LivenessInfo.NONE}) but the merged result has.
     */
    public void onPrimaryKeyLivenessInfo(int i, Clustering clustering, LivenessInfo merged, LivenessInfo original);

    
Called for the row deletion of input i. 
Params:
i – the input row from which original is from.
clustering – the clustering for the row that is merged.
merged – the deletion of the merged row. Will be null if input i had deletion but the merged result doesn't (i.e. the deletion has been shadowed).
original – the deletion of input i. May be null if input i had no deletion but the merged row has./**
     * Called for the row deletion of input {@code i}.
     *
     * @param i the input row from which {@code original} is from.
     * @param clustering the clustering for the row that is merged.
     * @param merged the deletion of the merged row. Will be {@code null} if input {@code i} had deletion
     * but the merged result doesn't (i.e. the deletion has been shadowed).
     * @param original the deletion of input {@code i}. May be {@code null} if input {@code i} had no deletion but the merged row has.
     */
    public void onDeletion(int i, Clustering clustering, Row.Deletion merged, Row.Deletion original);

    
Called for every (non-live) complex deletion of any complex column present in either the merged row of input i. 
Params:
i – the input row from which original is from.
clustering – the clustering for the row that is merged.
column – the column for which this is a complex deletion of.
merged – the complex deletion of the merged row. Will be null if input i had a complex deletion for column but the merged result doesn't (i.e. the deletion has been shadowed).
original – the complex deletion of input i for column column. May be null if input i had no complex deletion but the merged row has./**
     * Called for every (non-live) complex deletion of any complex column present in either the merged row of input {@code i}.
     *
     * @param i the input row from which {@code original} is from.
     * @param clustering the clustering for the row that is merged.
     * @param column the column for which this is a complex deletion of.
     * @param merged the complex deletion of the merged row. Will be {@code null} if input {@code i} had a complex deletion
     * for {@code column} but the merged result doesn't (i.e. the deletion has been shadowed).
     * @param original the complex deletion of input {@code i} for column {@code column}. May be {@code null} if input {@code i}
     * had no complex deletion but the merged row has.
     */
    public void onComplexDeletion(int i, Clustering clustering, ColumnDefinition column, DeletionTime merged, DeletionTime original);

    
Called for any cell that is either in the merged row or in input i. 
Params:
i – the input row from which original is from.
clustering – the clustering for the row that is merged.
merged – the cell of the merged row. Will be null if input i had a cell but that cell is no present in the merged result (it has been deleted/shadowed).
original – the cell of input i. May be null if input i had cell corresponding to merged./**
     * Called for any cell that is either in the merged row or in input {@code i}.
     *
     * @param i the input row from which {@code original} is from.
     * @param clustering the clustering for the row that is merged.
     * @param merged the cell of the merged row. Will be {@code null} if input {@code i} had a cell but that cell is no present
     * in the merged result (it has been deleted/shadowed).
     * @param original the cell of input {@code i}. May be {@code null} if input {@code i} had cell corresponding to {@code merged}.
     */
    public void onCell(int i, Clustering clustering, Cell merged, Cell original);
}