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/*
 * Copyright 2018-2024 guerlab.net and other contributors.
 *
 * Licensed under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.gnu.org/licenses/lgpl-3.0.html
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.guerlab.cloud.commons.ip;

/**
 * ipv4.
 *
 * @author guer
 */
public abstract class Ipv4 implements IpAddress {

	/**
	 * 最大值.
	 */
	public static final int MAX_VALUE = 255;

	/**
	 * 分组长度.
	 */
	public static final int GROUP_SIZE = 4;

	/**
	 * 最大子网长度.
	 */
	public static final int MAX_MASK = 32;

	/**
	 * 分割符正则表达式.
	 */
	public static final String SEPARATOR_REG = "\\.";

	/**
	 * IPv4格式.
	 */
	public static final String FORMAT = "%d.%d.%d.%d";

	/**
	 * 单段有效值格式.
	 */
	public static final String VALUE_FORMAT = "((25[0-5])|(2[0-4]\\d)|([0-1]?\\d?\\d))";

	/**
	 * 单段有效值正则表达式.
	 */
	public static final String VALUE_REG = "^" + VALUE_FORMAT + "$";

	/**
	 * 掩码有效值格式.
	 */
	public static final String MASK_VALUE_FORMAT = "((3[0-2])|([1-2]\\d)|([0]?[1-9]))";

	/**
	 * 掩码有效值正则表达式.
	 */
	public static final String MASK_VALUE_REG = "^" + MASK_VALUE_FORMAT + "$";

	/**
	 * 基础IPv4格式格式.
	 */
	public static final String BASE_FORMAT_FORMAT = "(" + VALUE_FORMAT + "(\\." + VALUE_FORMAT + "){3})";

	/**
	 * 基础IPv4格式正则表达式.
	 */
	public static final String BASE_FORMAT_REG = "^" + BASE_FORMAT_FORMAT + "$";

	/**
	 * 带子网掩码IPv4格式.
	 */
	public static final String WITH_MASK_FORMAT_FORMAT = "(" + BASE_FORMAT_FORMAT + "(/" + MASK_VALUE_FORMAT + ")" + "?)";

	/**
	 * 带子网掩码IPv4正则表达式.
	 */
	public static final String WITH_MASK_FORMAT_REG = "^" + WITH_MASK_FORMAT_FORMAT + "$";

	/**
	 * 范围IPv4格式.
	 */
	public static final String RANGE_END_FORMAT = "(" + VALUE_FORMAT + "\\.){0,3}(" + VALUE_FORMAT + ")";

	/**
	 * 范围IPv4正则表达式.
	 */
	public static final String RANGE_END_REG = "^" + RANGE_END_FORMAT + "$";

	protected Ipv4() {
	}
}