modules/table/src/main/java/org/apache/ignite/internal/table/distributed/command/DeleteAllCommand.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 java.util.HashSet;
import java.util.Set;
import org.apache.ignite.internal.schema.BinaryRow;
import org.apache.ignite.raft.client.WriteCommand;
import org.jetbrains.annotations.NotNull;

/**
 * The command deletes entries by the passed keys.
 */
public class DeleteAllCommand implements WriteCommand {
    /** Binary rows. */
    private transient Set<BinaryRow> rows;

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

    /**
     * Creates a new instance of DeleteAllCommand with the given set of keys to be deleted.
     * The {@code keyRows} should not be {@code null} or empty.
     *
     * @param keyRows Collection of binary row keys to be deleted.
     */
    public DeleteAllCommand(@NotNull Set<BinaryRow> keyRows) {
        assert keyRows != null && !keyRows.isEmpty();

        this.rows = keyRows;

        CommandUtils.rowsToBytes(keyRows, bytes -> rowsBytes = bytes);
    }

    /**
     * Returns a set of binary key rows to be deleted.
     *
     * @return Binary keys.
     */
    public Set<BinaryRow> getRows() {
        if (rows == null && rowsBytes != null) {
            rows = new HashSet<>();

            CommandUtils.readRows(rowsBytes, rows::add);
        }

        return rows;
    }
}