The pattern Role object (#1031)

* init repo for role object * add to init * add to init * add first impl * add pattern * add license * add changes
2026-05-15 16:58:56 +00:00 · 2019-10-26 18:58:40 +01:00
parent 5d47488fe9
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+/*
+ * The MIT License
+ * Copyright © 2014-2019 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package com.iluwatar.roleobject;
+
+import java.util.Optional;
+
+/**
+ * The main abstraction to work with Customer.
+ */
+public abstract class Customer {
+
+    /**
+     * Add specific role @see {@link Role}
+     *
+     * @param role to add
+     * @return true if the operation has been successful otherwise false
+     */
+    public abstract boolean addRole(Role role);
+
+    /**
+     * Check specific role @see {@link Role}
+     *
+     * @param role to check
+     * @return true if the role exists otherwise false
+     */
+
+    public abstract boolean hasRole(Role role);
+
+    /**
+     * Remove specific role @see {@link Role}
+     *
+     * @param role to remove
+     * @return true if the operation has been successful otherwise false
+     */
+    public abstract boolean remRole(Role role);
+
+    /**
+     * Get specific instance associated with this role @see {@link Role}
+     *
+     * @param role         to get
+     * @param expectedRole instance class expected to get
+     * @return optional with value if the instance exists and corresponds expected class
+     */
+    public abstract <T extends Customer> Optional<T> getRole(Role role, Class<T> expectedRole);
+
+
+    public static Customer newCustomer() {
+        return new CustomerCore();
+    }
+
+    public static Customer newCustomer(Role... role) {
+        Customer customer = newCustomer();
+        for (Role r : role) {
+            customer.addRole(r);
+        }
+        return customer;
+    }
+
+}