+/*
+ * Copyright (C) 2016 - 2022 Free Software Foundation
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.mxchange.jcustomercore.model.utils;
+
+import java.security.SecureRandom;
+import java.text.MessageFormat;
+import java.util.Objects;
+import java.util.Random;
+import org.apache.commons.lang3.StringUtils;
+import org.mxchange.jcustomercore.model.customer.Customer;
+
+/**
+ * Customer utilities
+ * <p>
+ * @author Roland Häder<roland@mxchange.org>
+ */
+public class CustomerUtils {
+
+ /**
+ * Random number generator
+ */
+ private static final Random RANDOM_NUMBER_GENERATOR;
+
+ /**
+ * Static initializer
+ */
+ static {
+ // Init RNG
+ RANDOM_NUMBER_GENERATOR = new SecureRandom();
+ }
+
+ /**
+ * Compares both customer instances. This method returns -1 if second
+ * instance is null.
+ * <p>
+ * @param customer1 Customer instance 1
+ * @param customer2 Customer instance 2
+ * <p>
+ * @return Comparison value
+ */
+ public static int compare (final Customer customer1, final Customer customer2) {
+ // Check equality, then at least first must be given
+ if (Objects.equals(customer1, customer2)) {
+ // Both are same
+ return 0;
+ } else if (null == customer1) {
+ // First is null
+ return -1;
+ } else if (null == customer2) {
+ // Second is null
+ return 1;
+ }
+
+ // Invoke compareTo() method
+ return customer1.compareTo(customer2);
+ }
+
+ /**
+ * Copies all fields from source customer to target customer instance.
+ * <p>
+ * @param targetCustomer Target customer instance 1
+ * @param sourceCustomer Source customer instance 2
+ * <p>
+ * @throws NullPointerException If one parameter is null
+ */
+ public static void copyCustomerData (final Customer targetCustomer, final Customer sourceCustomer) {
+ // Check both parameter
+ if (null == targetCustomer) {
+ // Throw NPE
+ throw new NullPointerException("targetCustomer is null"); //NOI18N
+ } else if (null == sourceCustomer) {
+ // Throw NPE
+ throw new NullPointerException("sourceCustomer is null"); //NOI18N
+ } else if (Objects.equals(sourceCustomer, targetCustomer)) {
+ // Is exactly the same!
+ throw new IllegalArgumentException("sourcerCustomer and targetCustomer are the same."); //NOI18N
+ }
+
+ // Copy all fields
+ targetCustomer.setCustomerAccountStatus(sourceCustomer.getCustomerAccountStatus());
+ targetCustomer.setCustomerContact(sourceCustomer.getCustomerContact());
+ targetCustomer.setCustomerId(sourceCustomer.getCustomerId());
+ targetCustomer.setCustomerLastLocked(sourceCustomer.getCustomerLastLocked());
+ targetCustomer.setCustomerLastLockedReason(sourceCustomer.getCustomerLastLockedReason());
+ targetCustomer.setCustomerNumber(sourceCustomer.getCustomerNumber());
+ }
+
+ /**
+ * Generates a random customer number with some dashes in it
+ * <p>
+ * @param totalLength Length of the number
+ * @param blockSize Block size
+ * @param separator Separator
+ * <p>
+ * @return Generated customer number
+ */
+ public static String generateCustomerNumber (final int totalLength, final short blockSize, final char separator) {
+ // All parameters must be set
+ if (totalLength < 5) {
+ // Total length is to short
+ throw new IllegalArgumentException(MessageFormat.format("Total length of{0} characters is to short (5 minimum)", totalLength)); //NOI18N
+ } else if (blockSize < 3) {
+ // 3 charcters is minimum
+ throw new IllegalArgumentException(MessageFormat.format("Block size of {0} characters is to short (3 minimum)", blockSize)); //NOI18N
+ }
+
+ // Init number
+ StringBuilder customerNumber = new StringBuilder(totalLength);
+
+ // Calculate total blockas
+ long totalBlocks = Math.round(totalLength / (blockSize - 1) - 0.5) - 1;
+
+ // Generate customer number
+ for (int i = 0; i < totalBlocks; i++) {
+ // Fill it up with leading zeros and append it + separator character
+ customerNumber.append(genrateBlock(blockSize)).append(separator);
+ }
+
+ // Calculate remaining charcters
+ long remain = totalLength - (blockSize + 1) * totalBlocks;
+
+ // Generate new block and append it
+ customerNumber.append(genrateBlock((short) remain));
+
+ // Return finished number
+ return customerNumber.toString();
+ }
+
+ /**
+ * Generates a block of numbers with leading zeros, if the random number is
+ * shorter than block size
+ * <p>
+ * @param blockSize Block size
+ * <p>
+ * @return Generated block
+ */
+ private static String genrateBlock (final short blockSize) {
+ // Generate random number
+ int num = RANDOM_NUMBER_GENERATOR.nextInt((int) Math.pow(10, blockSize));
+
+ // Generate "block" and return it
+ return StringUtils.leftPad(String.valueOf(num), blockSize, '0');
+ }
+
+ /**
+ * No constructors for utility classes
+ */
+ private CustomerUtils () {
+ }
+
+}