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Neo4j kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see http://neo4j.org.

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.kernel.impl.index.schema;

import org.neo4j.index.internal.gbptree.Layout;
import org.neo4j.io.pagecache.PageCursor;
import org.neo4j.storageengine.api.UpdateMode;

public class IndexUpdateEntry {
    private IndexUpdateEntry() {
        // Static utility class
    }

    public static  void read(
            PageCursor cursor, Layout layout, UpdateMode updateMode, KEY key1, KEY key2, VALUE value) {
        switch (updateMode) {
            case ADDED -> BlockEntry.read(cursor, layout, key1, value);
            case REMOVED -> BlockEntry.read(cursor, layout, key1);
            case CHANGED -> {
                BlockEntry.read(cursor, layout, key1);
                BlockEntry.read(cursor, layout, key2, value);
            }
        }
    }

    public static  void write(
            PageCursor cursor, Layout layout, UpdateMode updateMode, KEY key1, KEY key2, VALUE value) {
        switch (updateMode) {
            case ADDED -> BlockEntry.write(cursor, layout, key1, value);
            case REMOVED -> BlockEntry.write(cursor, layout, key1);
            case CHANGED -> {
                BlockEntry.write(cursor, layout, key1);
                BlockEntry.write(cursor, layout, key2, value);
            }
        }
    }
}