modules/table/src/main/java/org/apache/ignite/internal/table/distributed/command/ReplaceCommand.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.internal.table.distributed.command;

import org.apache.ignite.internal.schema.BinaryRow;
import org.apache.ignite.internal.schema.ByteBufferRow;
import org.apache.ignite.raft.client.WriteCommand;
import org.jetbrains.annotations.NotNull;

/**
 * The command replaces an old entry to a new one.
 */
public class ReplaceCommand implements WriteCommand {
    /** Replacing binary row. */
    private transient BinaryRow row;

    /** Replaced binary row. */
    private transient BinaryRow oldRow;

    /*
     * Row bytes.
     * It is a temporary solution, before network have not implement correct serialization BinaryRow.
     * TODO: Remove the field after (IGNITE-14793).
     */
    private byte[] rowBytes;

    /**
     * Old row bytes.
     * TODO: Remove the field after (IGNITE-14793).
     */
    private byte[] oldRowBytes;

    /**
     * Creates a new instance of ReplaceCommand with the given two rows to be replaced each other.
     * Both rows should not be {@code null}.
     *
     * @param oldRow Old Binary row.
     * @param row Binary row.
     */
    public ReplaceCommand(@NotNull BinaryRow oldRow, @NotNull BinaryRow row) {
        assert oldRow != null;
        assert row != null;

        this.oldRow = oldRow;
        this.row = row;

        CommandUtils.rowToBytes(oldRow, bytes -> oldRowBytes = bytes);
        CommandUtils.rowToBytes(row, bytes -> rowBytes = bytes);
    }

    /**
     * Gets a binary row which will be after replace.
     *
     * @return Binary row.
     */
    @NotNull
    public BinaryRow getRow() {
        if (row == null)
            row = new ByteBufferRow(rowBytes);

        return row;
    }

    /**
     * Gets a binary row which should be before replace.
     *
     * @return Binary row.
     */
    @NotNull
    public BinaryRow getOldRow() {
        if (oldRow == null)
            oldRow = new ByteBufferRow(oldRowBytes);

        return oldRow;
    }
}