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/*
 * Copyright © 2009 HotPads ([email protected])
 *
 * Licensed 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 io.datarouter.filesystem.snapshot.encode;

import java.util.Comparator;

import io.datarouter.filesystem.snapshot.entry.SnapshotEntry;
import io.datarouter.filesystem.snapshot.writer.BlockQueue.FileIdsAndEndings;

public interface BranchBlockEncoder extends DataBlockEncoder{

	final Comparator LEVEL_AND_BLOCK_ID_COMPARATOR = Comparator
			.comparingInt(BranchBlockEncoder::level)
			.thenComparingInt(BranchBlockEncoder::blockId);

	void add(int blockId, long keyId, SnapshotEntry entry, int childBlockId);

	int level();

	int blockId();

	int firstChildBlockId();

	default boolean isEmpty(){
		return numRecords() == 0;
	}

	EncodedBlock encode(FileIdsAndEndings fileIdsAndEndings);

}