From bd5cc6ff7a57dfea36586ab0a8a2987ce3a1ba90 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pawe=C5=82=20Dyda?= <pawel.dyda@amu.edu.pl>
Date: Thu, 27 Oct 2022 22:20:55 +0200
Subject: [PATCH] Strategy design pattern.

---
 .../demo/logic/ApartmentHousingStrategy.java  | 20 +++++++++++++++++++
 .../edu/demo/logic/HouseHousingStrategy.java  | 11 ++++++++++
 .../amu/edu/demo/logic/HousingStrategy.java   | 15 ++++++++++++++
 .../logic/WeWillStealYourFlatProduct.java     | 20 +++++++++++++++++++
 4 files changed, 66 insertions(+)
 create mode 100644 demo/02/src/main/java/pl/amu/edu/demo/logic/ApartmentHousingStrategy.java
 create mode 100644 demo/02/src/main/java/pl/amu/edu/demo/logic/HouseHousingStrategy.java
 create mode 100644 demo/02/src/main/java/pl/amu/edu/demo/logic/HousingStrategy.java
 create mode 100644 demo/02/src/main/java/pl/amu/edu/demo/logic/WeWillStealYourFlatProduct.java

diff --git a/demo/02/src/main/java/pl/amu/edu/demo/logic/ApartmentHousingStrategy.java b/demo/02/src/main/java/pl/amu/edu/demo/logic/ApartmentHousingStrategy.java
new file mode 100644
index 0000000..d1f7422
--- /dev/null
+++ b/demo/02/src/main/java/pl/amu/edu/demo/logic/ApartmentHousingStrategy.java
@@ -0,0 +1,20 @@
+package pl.amu.edu.demo.logic;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+import lombok.experimental.FieldDefaults;
+import pl.amu.edu.demo.data.Housing;
+import pl.amu.edu.demo.data.WeWillStealYourFlatCheckResult;
+import pl.amu.edu.demo.providers.AverageQuoteProvider;
+
+@RequiredArgsConstructor
+@FieldDefaults(level = AccessLevel.PRIVATE, makeFinal = true)
+public class ApartmentHousingStrategy implements HousingStrategy {
+
+    AverageQuoteProvider provider;
+
+    @Override
+    public WeWillStealYourFlatCheckResult checkEligibility(Housing housing) {
+        return WeWillStealYourFlatCheckResult.ELIGIBLE;
+    }
+}
diff --git a/demo/02/src/main/java/pl/amu/edu/demo/logic/HouseHousingStrategy.java b/demo/02/src/main/java/pl/amu/edu/demo/logic/HouseHousingStrategy.java
new file mode 100644
index 0000000..9ccced4
--- /dev/null
+++ b/demo/02/src/main/java/pl/amu/edu/demo/logic/HouseHousingStrategy.java
@@ -0,0 +1,11 @@
+package pl.amu.edu.demo.logic;
+
+import pl.amu.edu.demo.data.Housing;
+import pl.amu.edu.demo.data.WeWillStealYourFlatCheckResult;
+
+public class HouseHousingStrategy implements HousingStrategy{
+    @Override
+    public WeWillStealYourFlatCheckResult checkEligibility(Housing housing) {
+        return WeWillStealYourFlatCheckResult.NOT_ELIGIBLE;
+    }
+}
diff --git a/demo/02/src/main/java/pl/amu/edu/demo/logic/HousingStrategy.java b/demo/02/src/main/java/pl/amu/edu/demo/logic/HousingStrategy.java
new file mode 100644
index 0000000..c81c20d
--- /dev/null
+++ b/demo/02/src/main/java/pl/amu/edu/demo/logic/HousingStrategy.java
@@ -0,0 +1,15 @@
+package pl.amu.edu.demo.logic;
+
+import pl.amu.edu.demo.data.Housing;
+import pl.amu.edu.demo.data.WeWillStealYourFlatCheckResult;
+import pl.amu.edu.demo.providers.AverageQuoteProvider;
+
+public interface HousingStrategy {
+
+    WeWillStealYourFlatCheckResult checkEligibility(Housing housing);
+
+    static HousingStrategy getInstance(Housing housing, AverageQuoteProvider provider) {
+        return housing.isApartment ? new ApartmentHousingStrategy(provider) : new HouseHousingStrategy();
+    }
+
+}
diff --git a/demo/02/src/main/java/pl/amu/edu/demo/logic/WeWillStealYourFlatProduct.java b/demo/02/src/main/java/pl/amu/edu/demo/logic/WeWillStealYourFlatProduct.java
new file mode 100644
index 0000000..c52ecf8
--- /dev/null
+++ b/demo/02/src/main/java/pl/amu/edu/demo/logic/WeWillStealYourFlatProduct.java
@@ -0,0 +1,20 @@
+package pl.amu.edu.demo.logic;
+
+import pl.amu.edu.demo.data.Person;
+import pl.amu.edu.demo.data.WeWillStealYourFlatCheckResult;
+import pl.amu.edu.demo.providers.AverageQuoteProvider;
+
+public class WeWillStealYourFlatProduct {
+
+    private final AverageQuoteProvider provider;
+
+    public WeWillStealYourFlatProduct(AverageQuoteProvider provider) {
+        this.provider = provider;
+    }
+
+    public WeWillStealYourFlatCheckResult check(Person person) {
+        var strategy = HousingStrategy.getInstance(person.housing, provider);
+        return strategy.checkEligibility(person.housing);
+    }
+
+}