design pattern: strategy pattern

fishercoder1534 · fishercoder1534 · commit fc6e5e512cc1 · 2016-08-06T09:26:07.000-07:00
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/CookBehavior.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/CookBehavior.java
@@ -0,0 +1,6 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public interface CookBehavior {
+
+	public void cook();
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/CookNoodlesBehavior.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/CookNoodlesBehavior.java
@@ -0,0 +1,10 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public class CookNoodlesBehavior implements CookBehavior {
+
+	@Override
+	public void cook() {
+		System.out.println("I'm also fond of cooking Chinese noodles!");
+	}
+
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/CookRiceFlour.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/CookRiceFlour.java
@@ -0,0 +1,10 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public class CookRiceFlour implements CookBehavior {
+
+	@Override
+	public void cook() {
+		System.out.println("I'm cooking MiFen, aka, Rice Flour.");
+	}
+
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/LoveBehavior.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/LoveBehavior.java
@@ -0,0 +1,6 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public interface LoveBehavior {
+
+	public void showLove();
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/LoveHusbandBehavior.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/LoveHusbandBehavior.java
@@ -0,0 +1,10 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public class LoveHusbandBehavior implements LoveBehavior {
+
+	@Override
+	public void showLove() {
+		System.out.println("I love my husband Steve Sun, he is just awesome!");
+	}
+
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/ModelWife.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/ModelWife.java
@@ -0,0 +1,10 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public class ModelWife extends Wife {
+
+	public ModelWife() {
+		loveBehavior = new LoveHusbandBehavior();
+		cookBehavior = new CookRiceFlour();
+	}
+	
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/RealWife.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/RealWife.java
@@ -0,0 +1,10 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public class RealWife extends Wife {
+
+	public RealWife() {
+		System.out.println("I'm the real wife - Sophie Yan! I'm Sophie Yan, the wife of Steve Sun, and I like cooking for my husband and family. ");
+		this.cookBehavior = new CookRiceFlour();
+		this.loveBehavior = new LoveHusbandBehavior();
+	}
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/StrategtyPatternTestDrive.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/StrategtyPatternTestDrive.java
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+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+/**
+ * The Strategy Pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable.
+ * Strategy lets the algorithm vary independently from clients that use it.*/
+
+/**Design principle:
+ * Favor composition over inheritance.
+ * 
+ * Not only does it let you encapsulate a family of algorithms into their own set of classes, but it also lets you change behavior at runtime.*/
+public class StrategtyPatternTestDrive {
+
+	public static void main(String[] args) {
+		Wife wife = new RealWife();
+		wife.performLove();
+		wife.performCook();;
+		
+		wife.setCookBehavior(new CookNoodlesBehavior());
+		wife.performCook();
+	}
+
+}
diff --git a/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/Wife.java b/RandomProblems/src/learnHeadFirstDesignPatterns/chapter_1_strategy_pattern/Wife.java
@@ -0,0 +1,27 @@
+package learnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
+
+public abstract class Wife {
+
+	CookBehavior cookBehavior;
+	LoveBehavior loveBehavior;
+	
+	public Wife () {
+		System.out.println("I'm the abstract wife - Sophie Yan!");
+	};
+	
+	public void setCookBehavior(CookBehavior cb){
+		cookBehavior = cb;
+	}
+	
+	public void setLoveBehavior(LoveBehavior lb){
+		loveBehavior = lb;
+	}
+	
+	public void performCook(){
+		cookBehavior.cook();
+	}
+	
+	public void performLove(){
+		loveBehavior.showLove();
+	}
+}
