BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

guest/core-java/src/main/java/com/stackify/optional/Address.java

@@ -0,0 +1,40 @@
+package com.stackify.optional;
+
+public class Address {
+    private String addressLine;
+    private String city;
+    private Country country;
+
+    public Address(String addressLine, String city, Country country) {
+        super();
+        this.addressLine = addressLine;
+        this.city = city;
+        this.country = country;
+    }
+
+    public String getAddressLine() {
+        return addressLine;
+    }
+
+    public void setAddressLine(String addressLine) {
+        this.addressLine = addressLine;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    public Country getCountry() {
+        return country;
+    }
+
+    public void setCountry(Country country) {
+        this.country = country;
+    }
+
+   
+}

guest/core-java/src/main/java/com/stackify/optional/Country.java

@@ -0,0 +1,29 @@
+package com.stackify.optional;
+
+public class Country {
+    private String name;
+    private String isocode;
+
+    public Country(String name, String isocode) {
+        super();
+        this.name = name;
+        this.isocode = isocode;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getIsocode() {
+        return isocode;
+    }
+
+    public void setIsocode(String isocode) {
+        this.isocode = isocode;
+    }
+
+}

guest/core-java/src/main/java/com/stackify/optional/User.java

@@ -0,0 +1,51 @@
+package com.stackify.optional;
+
+import java.util.Optional;
+
+public class User {
+    private String email;
+    private String password;
+
+    private Address address;
+
+    private String position;
+
+    public User(String email, String password) {
+        super();
+        this.email = email;
+        this.password = password;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public Address getAddress() {
+        return address;
+    }
+
+    public void setAddress(Address address) {
+        this.address = address;
+    }
+
+    public Optional<String> getPosition() {
+        return Optional.ofNullable(position);
+    }
+
+    public void setPosition(String position) {
+        this.position = position;
+    }
+
+}

guest/core-java/src/main/java/com/stackify/optional/chaining/Address.java

@@ -0,0 +1,38 @@
+package com.stackify.optional.chaining;
+
+import java.util.Optional;
+
+public class Address {
+    private String addressLine;
+    private String city;
+    private Country country;
+
+    public Address(String addressLine, String city) {
+        this.addressLine = addressLine;
+        this.city = city;
+    }
+
+    public String getAddressLine() {
+        return addressLine;
+    }
+
+    public void setAddressLine(String addressLine) {
+        this.addressLine = addressLine;
+    }
+
+    public String getCity() {
+        return city;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    public Optional<Country> getCountry() {
+        return Optional.ofNullable(country);
+    }
+
+    public void setCountry(Country country) {
+        this.country = country;
+    }   
+}

guest/core-java/src/main/java/com/stackify/optional/chaining/Country.java

@@ -0,0 +1,28 @@
+package com.stackify.optional.chaining;
+
+public class Country {
+    private String name;
+    private String isocode;
+
+    public Country(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getIsocode() {
+        return isocode;
+    }
+
+    public void setIsocode(String isocode) {
+        this.isocode = isocode;
+    }
+
+   
+}

guest/core-java/src/main/java/com/stackify/optional/chaining/User.java

@@ -0,0 +1,50 @@
+package com.stackify.optional.chaining;
+
+import java.util.Optional;
+
+public class User {
+    private String email;
+    private String password;
+
+    private Address address;
+
+    private String position;
+
+    public User(String email, String password) {
+        this.email = email;
+        this.password = password;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public Optional<Address> getAddress() {
+        return Optional.ofNullable(address);
+    }
+
+    public void setAddress(Address address) {
+        this.address = address;
+    }
+
+    public Optional<String> getPosition() {
+        return Optional.ofNullable(position);
+    }
+
+    public void setPosition(String position) {
+        this.position = position;
+    }
+
+}

guest/core-java/src/main/java/com/stackify/optionalparams/MultiVitamin.java

@@ -0,0 +1,50 @@
+package com.stackify.optionalparams;
+
+public class MultiVitamin {
+
+    private String name;    // required
+    private int vitaminA;   // in mcg
+    private int vitaminC;   // in mg
+    private int calcium;    // in mg
+    private int iron;       // in mg
+
+    public MultiVitamin(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getVitaminA() {
+        return vitaminA;
+    }
+
+    public void setVitaminA(int vitaminA) {
+        this.vitaminA = vitaminA;
+    }
+
+    public int getVitaminC() {
+        return vitaminC;
+    }
+
+    public void setVitaminC(int vitaminC) {
+        this.vitaminC = vitaminC;
+    }
+
+    public int getCalcium() {
+        return calcium;
+    }
+
+    public void setCalcium(int calcium) {
+        this.calcium = calcium;
+    }
+
+    public int getIron() {
+        return iron;
+    }
+
+    public void setIron(int iron) {
+        this.iron = iron;
+    }
+}

guest/core-java/src/main/java/com/stackify/optionalparams/MultiVitaminAllowingNulls.java

@@ -0,0 +1,38 @@
+package com.stackify.optionalparams;
+
+public class MultiVitaminAllowingNulls {
+
+    private String name;    // required
+    private Integer vitaminA;   // in mcg
+    private Integer vitaminC;   // in mg
+    private Integer calcium;    // in mg
+    private Integer iron;       // in mg
+
+    public MultiVitaminAllowingNulls(String name, Integer vitaminA, Integer vitaminC, Integer calcium, Integer iron) {
+        this.name = name;
+        this.vitaminA = vitaminA;
+        this.vitaminC = vitaminC;
+        this.calcium = calcium;
+        this.iron = iron;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public Integer getVitaminA() {
+        return vitaminA;
+    }
+
+    public Integer getVitaminC() {
+        return vitaminC;
+    }
+
+    public Integer getCalcium() {
+        return calcium;
+    }
+
+    public Integer getIron() {
+        return iron;
+    }
+}

guest/core-java/src/main/java/com/stackify/optionalparams/MultiVitaminOverloading.java

@@ -0,0 +1,56 @@
+package com.stackify.optionalparams;
+
+public class MultiVitaminOverloading {
+
+    static final int DEFAULT_IRON_AMOUNT = 20;
+
+    private final String name;    // required
+    private final int vitaminA;   // in mcg
+    private final int vitaminC;   // in mg
+    private final int calcium;    // in mg
+    private final int iron;       // in mg
+
+    public MultiVitaminOverloading(String name) {
+        this(name, 0);
+    }
+
+    public MultiVitaminOverloading(String name, int vitaminA) {
+        this(name, vitaminA, 0);
+    }
+
+    public MultiVitaminOverloading(String name, int vitaminA, int vitaminC) {
+        this(name, vitaminA, vitaminC, 0);
+    }
+
+    public MultiVitaminOverloading(String name, int vitaminA, int vitaminC, int calcium) {
+        this(name, vitaminA, vitaminC, calcium, DEFAULT_IRON_AMOUNT);
+    }
+
+    public MultiVitaminOverloading(String name, int vitaminA, int vitaminC, int calcium, int iron) {
+        this.name = name;
+        this.vitaminA = vitaminA;
+        this.vitaminC = vitaminC;
+        this.calcium = calcium;
+        this.iron = iron;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getVitaminA() {
+        return vitaminA;
+    }
+
+    public int getVitaminC() {
+        return vitaminC;
+    }
+
+    public int getCalcium() {
+        return calcium;
+    }
+
+    public int getIron() {
+        return iron;
+    }
+}

guest/core-java/src/main/java/com/stackify/optionalparams/MultiVitaminStaticFactoryMethods.java

@@ -0,0 +1,52 @@
+package com.stackify.optionalparams;
+
+public class MultiVitaminStaticFactoryMethods {
+
+    static final int IRON_AMT_DEF = 20;
+    static final int IRON_AMT_MEN = 30;
+
+    static final int CALCIUM_AMT_DEF = 100;
+    static final int CALCIUM_AMT_WOMEN = 120;
+
+    private final String name;    // required
+    private final int vitaminA;   // in mcg
+    private final int vitaminC;   // in mg
+    private final int calcium;    // in mg
+    private final int iron;       // in mg
+
+    public static MultiVitaminStaticFactoryMethods forMen(String name) {
+        return new MultiVitaminStaticFactoryMethods(name, 5000, 60, CALCIUM_AMT_DEF, IRON_AMT_MEN);
+    }
+
+    public static MultiVitaminStaticFactoryMethods forWomen(String name) {
+        return new MultiVitaminStaticFactoryMethods(name, 5000, 60, CALCIUM_AMT_WOMEN, IRON_AMT_DEF);
+    }
+
+    private MultiVitaminStaticFactoryMethods(String name, int vitaminA, int vitaminC, int calcium, int iron) {
+        this.name = name;
+        this.vitaminA = vitaminA;
+        this.vitaminC = vitaminC;
+        this.calcium = calcium;
+        this.iron = iron;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getVitaminA() {
+        return vitaminA;
+    }
+
+    public int getVitaminC() {
+        return vitaminC;
+    }
+
+    public int getCalcium() {
+        return calcium;
+    }
+
+    public int getIron() {
+        return iron;
+    }
+}

guest/core-java/src/main/java/com/stackify/optionalparams/MultiVitaminWithBuilder.java

@@ -0,0 +1,77 @@
+package com.stackify.optionalparams;
+
+public class MultiVitaminWithBuilder {
+
+    private final String name;    // required
+    private final int vitaminA;   // in mcg
+    private final int vitaminC;   // in mg
+    private final int calcium;    // in mg
+    private final int iron;       // in mg
+
+    private MultiVitaminWithBuilder(MultiVitaminBuilder builder) {
+        this.name = builder.name;
+        this.vitaminA = builder.vitaminA;
+        this.vitaminC = builder.vitaminC;
+        this.calcium = builder.calcium;
+        this.iron = builder.iron;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getVitaminA() {
+        return vitaminA;
+    }
+
+    public int getVitaminC() {
+        return vitaminC;
+    }
+
+    public int getCalcium() {
+        return calcium;
+    }
+
+    public int getIron() {
+        return iron;
+    }
+
+    public static class MultiVitaminBuilder {
+
+        private static final int ZERO = 0;
+
+        private final String name; // required
+        private int vitaminA = ZERO;
+        private int vitaminC = ZERO;
+        private int calcium = ZERO;
+        private int iron = ZERO;
+
+        public MultiVitaminBuilder(String name) {
+            this.name = name;
+        }
+
+        public MultiVitaminBuilder withVitaminA(int vitaminA) {
+            this.vitaminA = vitaminA;
+            return this;
+        }
+
+        public MultiVitaminBuilder withVitaminC(int vitaminC) {
+            this.vitaminC = vitaminC;
+            return this;
+        }
+
+        public MultiVitaminBuilder withCalcium(int calcium) {
+            this.calcium = calcium;
+            return this;
+        }
+
+        public MultiVitaminBuilder withIron(int iron) {
+            this.iron = iron;
+            return this;
+        }
+
+        public MultiVitaminWithBuilder build() {
+            return new MultiVitaminWithBuilder(this);
+        }
+    }
+}

guest/core-java/src/main/java/com/stackify/stream/Employee.java

@@ -0,0 +1,46 @@
+package com.stackify.stream;
+
+public class Employee {
+    private Integer id;
+    private String name;
+    private Double salary;
+    
+    public Employee(Integer id, String name, Double salary) {
+        this.id = id;
+        this.name = name;        
+        this.salary = salary;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+    
+    public Double getSalary() {
+        return salary;
+    }
+
+    public void setSalary(Double salary) {
+        this.salary = salary;
+    }
+    
+    public void salaryIncrement(Double percentage) {
+        Double newSalary = salary + percentage * salary / 100;
+        setSalary(newSalary);
+    }
+
+    public String toString() {
+        return "Id: " + id + " Name:" + name + " Price:" + salary;
+    }
+}

guest/core-java/src/main/java/com/stackify/stream/EmployeeRepository.java

@@ -0,0 +1,21 @@
+package com.stackify.stream;
+
+import java.util.List;
+
+public class EmployeeRepository {
+    private List<Employee> empList;
+    
+    public EmployeeRepository(List<Employee> empList) {
+        this.empList = empList;
+    
+    }
+    public Employee findById(Integer id) {
+        for (Employee emp : empList) {
+            if (emp.getId() == id) {
+                return emp;
+            }
+        }
+        
+        return null;
+    }
+}

guest/core-java/src/main/resources/log4j2.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+	<Appenders>
+		  <Console name="Console" target="SYSTEM_OUT">
+            <PatternLayout pattern="%msg%n" />
+        </Console>
+	</Appenders>
+	<Loggers>
+		<Root level="info">
+			<AppenderRef ref="Console" />
+		</Root>
+	</Loggers>
+</Configuration>