converted project to lambda exercise

src/main/java/com/zipcode/ArrayListLoopMethods.java

@@ -1,37 +0,0 @@
-package com.zipcode;
-
-import com.zipcode.tools.PersonFactory;
-
-import java.util.ArrayList;
-
-/**
- * Created by leon on 5/2/17.
- */
-public class ArrayListLoopMethods {
-    private ArrayList<Person> personArrayList = PersonFactory.createPersonArrayList(100);
-
-    public void testWhileLoop() {
-        int i = 0;
-        while(i<personArrayList.size()) {
-            Person person = personArrayList.get(i);
-            String name = person.getName();
-            System.out.println(name);
-            i++;
-        }
-    }
-
-    public void testForLoop() {
-        for(int i=0; i<personArrayList.size(); i++) {
-            Person person = personArrayList.get(i);
-            String name = person.getName();
-            System.out.println(name);
-        }
-    }
-
-    public void testForEachloop() {
-        for(Person person : personArrayList) {
-            String name = person.getName();
-            System.out.println(name);
-        }
-    }
-}

src/main/java/com/zipcode/ArrayLoopMethods.java

@@ -1,36 +0,0 @@
-package com.zipcode;
-
-import com.zipcode.Person;
-import com.zipcode.tools.PersonFactory;
-
-/**
- * Created by leon on 5/2/17.
- */
-public class ArrayLoopMethods {
-    private Person[] personArray = PersonFactory.createPersonArray(100);
-
-    public void testWhileLoop() {
-        int i = 0;
-        while(i< personArray.length) {
-            Person person = personArray[i];
-            String name = person.getName();
-            System.out.println(name);
-            i++;
-        }
-    }
-
-    public void testForLoop() {
-        for(int i = 0; i< personArray.length; i++) {
-            Person person = personArray[i];
-            String name = person.getName();
-            System.out.println(name);
-        }
-    }
-
-    public void testForEachloop() {
-        for(Person person : personArray) {
-            String name = person.getName();
-            System.out.println(name);
-        }
-    }
-}

src/main/java/com/zipcode/Person.java

@@ -1,62 +0,0 @@
-package com.zipcode;
-
-import java.util.Date;
-
-/**
- * Created by leon on 5/1/17.
- */
-public class Person {
-    private String name;
-    private int age;
-    private boolean isMale;
-    private long personalId;
-    private Date birthDate;
-
-    public Person(String name, int age, boolean isMale, long personalId, Date birthDate) {
-        this.name = name;
-        this.age = age;
-        this.isMale = isMale;
-        this.personalId = personalId;
-        this.birthDate = birthDate;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public int getAge() {
-        return age;
-    }
-
-    public boolean isMale() {
-        return isMale;
-    }
-
-    public long getPersonalId() {
-        return personalId;
-    }
-
-    public Date getBirthDate() {
-        return birthDate;
-    }
-
-    public void setPersonalId(long personalId) {
-        this.personalId = personalId;
-    }
-
-    public void setMale(boolean male) {
-        isMale = male;
-    }
-
-    public void setAge(int age) {
-        this.age = age;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public void setBirthDate(Date birthDate) {
-        this.birthDate = birthDate;
-    }
-}

src/main/java/com/zipcode/tools/PersonFactory.java

@@ -1,35 +0,0 @@
-package com.zipcode.tools;
-import com.zipcode.Person;
-
-import java.util.ArrayList;
-import java.util.Date;
-
-/** Created by leon on 5/1/17. */
-public class PersonFactory {
-    public static Person createRandomPerson() {
-        String name = RandomUtils.createString('a', 'z', 10);
-        int age = RandomUtils.createInteger(0, 99);
-        boolean isMale = RandomUtils.chance(50);
-        long personalId = System.nanoTime();
-        Date birthDate = RandomUtils.createDate(1950, 2010);
-        Person randomPerson = new Person(name, age, isMale, personalId, birthDate);
-        return randomPerson;
-    }
-
-    public static ArrayList<Person> createPersonArrayList(int personCount) {
-        ArrayList<Person> people = new ArrayList<Person>();
-        for(int i=0;i<people.size();i++) {
-            people.add(PersonFactory.createRandomPerson());
-        }
-        return people;
-    }
-
-
-    public static Person[] createPersonArray(int personCount) {
-        Person[] people = new Person[personCount];
-        for(int i=0;i<people.length;i++) {
-            people[i] = PersonFactory.createRandomPerson();
-        }
-        return people;
-    }
-}

src/main/java/com/zipcodewilmington/lambdas/StreamFilter.java

@@ -0,0 +1,95 @@
+package com.zipcodewilmington.lambdas;
+
+import com.zipcodewilmington.lambdas.anthropoid.Person;
+import com.zipcodewilmington.lambdas.anthropoid.PersonFactory;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+/**
+ * Created by leon on 5/2/17.
+ */
+public class LambdaFilter {
+    private final Stream<Person> personStream;
+    public final String startingCharacter;
+
+    /**
+     * No arg constructor
+     */
+    public LambdaFilter() {
+        this(PersonFactory.createPersonStream(100), 'A');
+    }
+
+    /**
+     * @param people - Array of person objects
+     * @param startingCharacter - character to filter by
+     */
+    public LambdaFilter(Person[] people, Character startingCharacter) {
+        this(Stream.of(people), startingCharacter);
+    }
+
+    /**
+     * @param people - List of person objects
+     * @param startingCharacter - character to filter by
+     */
+    public LambdaFilter(List<Person> people, Character startingCharacter) {
+        this(people.stream(), startingCharacter);
+    }
+
+
+    /**
+     * @param people - Stream of person objects
+     * @param startingCharacter - character to filter by
+     */
+    public LambdaFilter(Stream<Person> people, Character startingCharacter) {
+        this.personStream = people;
+        this.startingCharacter = startingCharacter.toString();
+    }
+
+
+
+    /**
+     * Using multi-line lambda syntax
+     * @return a list of person object whose name starts with "A"
+     */
+    public List<Person> toListMultiLine() {
+        Stream<Person> personStreamFiltered = personStream.filter(person -> person.name.getValue().startsWith(startingCharacter));
+        List list = personStreamFiltered.collect(Collectors.toList());
+        return list;
+    }
+
+
+    /**
+     * Using one-line lambda syntax
+     * @return a list of person object whose name starts with "A"
+     */
+    public List<Person> toListOneLine() {
+        return personStream
+                .filter(person -> person.name.getValue().startsWith(startingCharacter))
+                .collect(Collectors.toList());
+    }
+
+
+    /**
+     * Using one-line lambda syntax
+     * @return an array of person object whose name starts with "A"
+     */
+    public Person[] toArrayOneLine() {
+        return personStream
+                .filter(person -> person.name.getValue().startsWith(startingCharacter))
+                .toArray(Person[]::new); // method reference
+    }
+
+
+    /**
+     * Using multi-line lambda syntax
+     * @return an array of person object whose name starts with "A"
+     */
+    public Person[] toArrayMultiLine() {
+        Stream<Person> personStreamFiltered = personStream.filter(person -> person.name.getValue().startsWith(startingCharacter));
+        Person[] personArray = personStreamFiltered.toArray(Person[]::new); // method reference
+        return personArray;
+    }
+
+}

src/main/java/com/zipcodewilmington/lambdas/StreamMap.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas;
+
+/**
+ * Created by leon on 5/24/17.
+ */
+public class MapSyntax {
+}

src/main/java/com/zipcodewilmington/lambdas/anthropoid/Person.java

@@ -0,0 +1,45 @@
+package com.zipcodewilmington.lambdas.tools.anthropoid;
+
+import java.util.Date;
+
+/**
+ * Created by leon on 5/1/17.
+ */
+public class Person {
+    public final PersonProperty<String> name;
+    public final PersonProperty<Integer> age;
+    public final PersonProperty<Boolean> isMale;
+    public final PersonProperty<Long> personalId;
+    public final PersonProperty<Date> birthDate;
+
+    /**
+     * @param name - name of person
+     * @param age - age of person
+     * @param isMale - gender flag
+     * @param personalId - unique id
+     * @param birthDate - date of birth
+     */
+    public Person(String name, int age, boolean isMale, long personalId, Date birthDate) {
+        this.name = new PersonProperty<>(name);
+        this.age = new PersonProperty<>(age);
+        this.isMale = new PersonProperty<>(isMale);
+        this.personalId = new PersonProperty<>(personalId);
+        this.birthDate = new PersonProperty<>(birthDate);
+    }
+
+    /** the purpose of this class is compress verbose getter and setter logic
+     * @param <E> the type of data to store */
+    public class PersonProperty<E> {
+        private E val; // value of the data
+
+        /** @param val - value of data for this object to store */
+        public PersonProperty(E val) {
+            this.val = val;
+        }
+
+        /** @return value this object is storing*/
+        public E getValue() {
+            return val;
+        }
+    }
+}

src/main/java/com/zipcodewilmington/lambdas/anthropoid/PersonFactory.java

@@ -0,0 +1,55 @@
+package com.zipcodewilmington.lambdas.tools.anthropoid;
+
+import com.zipcodewilmington.lambdas.tools.RandomUtils;
+import com.zipcodewilmington.lambdas.tools.StringUtils;
+
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+/**
+ * Created by leon on 5/1/17.
+ */
+public class PersonFactory {
+    /**
+     * @return a new instance of a person with randomized fields
+     */
+    public static Person createRandomPerson() {
+        String name = StringUtils.capitalizeFirstChar(RandomUtils.createString('a', 'z', 10));
+        int age = RandomUtils.createInteger(0, 99);
+        boolean isMale = RandomUtils.chance(50);
+        long personalId = System.nanoTime();
+        Date birthDate = RandomUtils.createDate(1950, 2010);
+
+        Person randomPerson = new Person(name, age, isMale, personalId, birthDate);
+        return randomPerson;
+    }
+
+    /**
+     * @param personCount - number of Person objects to create
+     * @return - ArrayList of Person objects
+     */
+    public static List<Person> createPersonList(int personCount) {
+        return createPersonStream(personCount).collect(Collectors.toList());
+    }
+
+
+    /**
+     * @param personCount - number of Person objects to create
+     * @return - Array of Person objects
+     */
+    public static Person[] createPersonArray(int personCount) {
+        return createPersonStream(personCount).toArray(Person[]::new);
+    }
+
+
+    /**
+     * @param personCount - number of Person objects to create
+     * @return - Stream representation of collection of Person objects
+     */
+    public static Stream<Person> createPersonStream(int personCount) {
+        return Stream.generate(PersonFactory::createRandomPerson).limit(personCount);
+    }
+}

src/main/java/com/zipcodewilmington/lambdas/exercises/ArrayConversion.java

@@ -0,0 +1,25 @@
+package com.zipcodewilmington.lambdas;
+
+import com.zipcodewilmington.lambdas.anthropoid.Person;
+
+import java.util.List;
+import java.util.function.Predicate;
+import java.util.stream.Stream;
+
+/**
+ * Created by leon on 5/25/17.
+ */
+public class ArrayConversions {
+    public Stream<Person> getStream() {
+        return null;
+    }
+
+    public static List<Person> getList() {
+        return null;
+    }
+
+    public Stream<Person> filter(Predicate<? super Person> predicate) {
+        return getStream().filter(predicate);
+    }
+
+}

src/main/java/com/zipcodewilmington/lambdas/exercises/ConversionAgent.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas.exercises;
+
+/**
+ * Created by leon on 5/25/17.
+ */
+public class Conversion {
+}

src/main/java/com/zipcodewilmington/lambdas/exercises/ListConversion.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas;
+
+/**
+ * Created by leon on 5/25/17.
+ */
+public class ListConversions {
+}

src/main/java/com/zipcodewilmington/lambdas/exercises/StreamConversion.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas.exercises;
+
+/**
+ * Created by leon on 5/25/17.
+ */
+public class StreamConversions {
+}

src/main/java/com/zipcode/tools/RandomUtils.java → src/main/java/com/zipcodewilmington/lambdas/tools/RandomUtils.java

@@ -17,7 +17,7 @@ public abstract class RandomUtils {
 
     /** @return a random character between the specified min and max character range */
     public static Character createCharacter(char min, char max) {
-        return (char) createInteger((int) min, (int) min).intValue();
+        return (char) createInteger((int) min, (int) max).intValue();
     }
 
     /** @return a random double between the specified min and max numeric range */

src/main/java/com/zipcodewilmington/lambdas/tools/ReflectionUtils.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas.tools;
+
+/**
+ * Created by leon on 5/24/17.
+ */
+public class ReflectionUtils {
+}

src/main/java/com/zipcodewilmington/lambdas/tools/StringUtils.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas.tools;
+
+/**
+ * Created by leon on 5/24/17.
+ */
+public class StringUtils {
+}

src/test/java/com/zipcode/ArrayListLoopMethodsTest.java

@@ -1,30 +0,0 @@
-package com.zipcode;
-
-import org.junit.Before;
-import org.junit.Test;
-
-/**
- * Created by leon on 5/2/17.
- */
-public class ArrayListLoopMethodsTest {
-    private ArrayListLoopMethods arrayListLoopMethods;
-    @Before
-    public void setup() {
-        arrayListLoopMethods = new ArrayListLoopMethods();
-    }
-
-    @Test
-    public void testWhileLoop() {
-        arrayListLoopMethods.testWhileLoop();
-    }
-
-    @Test
-    public void testForLoop() {
-        arrayListLoopMethods.testForLoop();
-    }
-
-    @Test
-    public void testForEachLoop() {
-        arrayListLoopMethods.testForEachloop();
-    }
-}

src/test/java/com/zipcode/ArrayLoopMethodsTest.java

@@ -1,31 +0,0 @@
-package com.zipcode;
-
-import org.junit.Before;
-import org.junit.Test;
-
-/**
- * Created by leon on 5/2/17.
- */
-public class ArrayLoopMethodsTest {
-    private ArrayLoopMethods arrayLoopMethods;
-
-    @Before
-    public void setup() {
-        arrayLoopMethods = new ArrayLoopMethods();
-    }
-
-    @Test
-    public void testWhileLoop() {
-        arrayLoopMethods.testWhileLoop();
-    }
-
-    @Test
-    public void testForLoop() {
-        arrayLoopMethods.testForLoop();
-    }
-
-    @Test
-    public void testForEachLoop() {
-        arrayLoopMethods.testForEachloop();
-    }
-}

src/test/java/com/zipcodewilmington/lambdas/TestPersonFactory.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas;
+
+/**
+ * Created by leon on 5/24/17.
+ */
+public class TestPersonFactory {
+}

src/test/java/com/zipcodewilmington/lambdas/TestStreamFilter.java

@@ -0,0 +1,53 @@
+package com.zipcodewilmington.lambdas;
+
+import com.zipcodewilmington.lambdas.anthropoid.Person;
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Created by leon on 5/2/17.
+ */
+public class TestLambdaFilter {
+    private LambdaFilter lambdaFilter;
+
+    @Before
+    public void setup() {
+        lambdaFilter = new LambdaFilter();
+    }
+
+    @Test
+    public void testToListMultiLine() {
+        testFilter(lambdaFilter.toListMultiLine());
+    }
+
+    @Test
+    public void testToListOneLine() {
+        testFilter(lambdaFilter.toListOneLine());
+    }
+
+    @Test
+    public void testToArrayMultiLine() {
+        testFilter(lambdaFilter.toArrayMultiLine());
+    }
+
+    @Test
+    public void testToArrayOneLine() {
+        testFilter(lambdaFilter.toArrayOneLine());
+    }
+
+
+
+
+    private void testFilter(Person[] persons) {
+        testFilter(Arrays.asList(persons));
+    }
+
+    private void testFilter(List<Person> persons) {
+        for (Person p : persons) {
+            assert (p.name.getValue().startsWith(lambdaFilter.startingCharacter));
+        }
+    }
+}

src/test/java/com/zipcodewilmington/lambdas/TestStreamMap.java

@@ -0,0 +1,14 @@
+package com.zipcodewilmington.lambdas;
+
+import org.junit.Test;
+
+/**
+ * Created by leon on 5/24/17.
+ */
+public class
+TestMapSyntax {
+    @Test
+    public void test() {
+
+    }
+}

src/test/java/com/zipcodewilmington/lambdas/TestSuiteFullRegression.java

@@ -0,0 +1,7 @@
+package com.zipcodewilmington.lambdas;
+
+/**
+ * Created by leon on 5/24/17.
+ */
+public class TestSuiteFullRegression {
+}