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/*
 * DISCLAIMER
 *
 * Copyright 2016 ArangoDB GmbH, Cologne, Germany
 *
 * 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.
 *
 * Copyright holder is ArangoDB GmbH, Cologne, Germany
 */

package com.arangodb.velocypack.internal.util;

import java.util.HashMap;
import java.util.Map;

/**
 * @author Mark - mark at arangodb.com
 *
 */
public class ObjectArrayUtil {

	private static final Map FIRST_SUB_MAP;

	static {
		FIRST_SUB_MAP = new HashMap();

		FIRST_SUB_MAP.put((byte) 0x00, 0); // None
		FIRST_SUB_MAP.put((byte) 0x01, 1); // empty array
		FIRST_SUB_MAP.put((byte) 0x02, 2); // array without index table
		FIRST_SUB_MAP.put((byte) 0x03, 3); // array without index table
		FIRST_SUB_MAP.put((byte) 0x04, 5); // array without index table
		FIRST_SUB_MAP.put((byte) 0x05, 9); // array without index table
		FIRST_SUB_MAP.put((byte) 0x06, 3); // array with index table
		FIRST_SUB_MAP.put((byte) 0x07, 5); // array with index table
		FIRST_SUB_MAP.put((byte) 0x08, 9); // array with index table
		FIRST_SUB_MAP.put((byte) 0x09, 9); // array with index table
		FIRST_SUB_MAP.put((byte) 0x0a, 1); // empty object
		FIRST_SUB_MAP.put((byte) 0x0b, 3); // object with sorted index table
		FIRST_SUB_MAP.put((byte) 0x0c, 5); // object with sorted index table
		FIRST_SUB_MAP.put((byte) 0x0d, 9); // object with sorted index table
		FIRST_SUB_MAP.put((byte) 0x0e, 9); // object with sorted index table
		FIRST_SUB_MAP.put((byte) 0x0f, 3); // object with unsorted index table
		FIRST_SUB_MAP.put((byte) 0x10, 5); // object with unsorted index table
		FIRST_SUB_MAP.put((byte) 0x11, 9); // object with unsorted index table
		FIRST_SUB_MAP.put((byte) 0x12, 9); // object with unsorted index table
	}

	public static int getFirstSubMap(final byte key) {
		return FIRST_SUB_MAP.get(key);
	}

	private static final Map OFFSET_SIZE;
	static {
		OFFSET_SIZE = new HashMap();

		OFFSET_SIZE.put((byte) 0x00, 0); // None
		OFFSET_SIZE.put((byte) 0x01, 1); // empty array
		OFFSET_SIZE.put((byte) 0x02, 1); // array without index table
		OFFSET_SIZE.put((byte) 0x03, 2); // array without index table
		OFFSET_SIZE.put((byte) 0x04, 4); // array without index table
		OFFSET_SIZE.put((byte) 0x05, 8); // array without index table
		OFFSET_SIZE.put((byte) 0x06, 1); // array with index table
		OFFSET_SIZE.put((byte) 0x07, 2); // array with index table
		OFFSET_SIZE.put((byte) 0x08, 4); // array with index table
		OFFSET_SIZE.put((byte) 0x09, 8); // array with index table
		OFFSET_SIZE.put((byte) 0x0a, 1); // empty object
		OFFSET_SIZE.put((byte) 0x0b, 1); // object with sorted index table
		OFFSET_SIZE.put((byte) 0x0c, 2); // object with sorted index table
		OFFSET_SIZE.put((byte) 0x0d, 4); // object with sorted index table
		OFFSET_SIZE.put((byte) 0x0e, 8); // object with sorted index table
		OFFSET_SIZE.put((byte) 0x0f, 1); // object with unsorted index table
		OFFSET_SIZE.put((byte) 0x10, 2); // object with unsorted index table
		OFFSET_SIZE.put((byte) 0x11, 4); // object with unsorted index table
		OFFSET_SIZE.put((byte) 0x12, 8); // object with unsorted index table
	}

	private ObjectArrayUtil() {
		super();
	}

	public static int getOffsetSize(final byte key) {
		return OFFSET_SIZE.get(key);
	}
}