finished

.idea/compiler.xml

@@ -7,10 +7,12 @@
         <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
         <outputRelativeToContentRoot value="true" />
         <module name="looptest" />
+        <module name="streamdemo" />
       </profile>
     </annotationProcessing>
     <bytecodeTargetLevel target="1.8">
       <module name="looptest" target="1.8" />
+      <module name="streamdemo" target="8" />
     </bytecodeTargetLevel>
   </component>
 </project>

pom.xml

@@ -7,6 +7,18 @@
     <groupId>mygroupid</groupId>
     <artifactId>looptest</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
     <dependencies>
         <dependency>
             <groupId>junit</groupId>

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

@@ -5,10 +5,15 @@ import com.zipcodewilmington.streams.anthropoid.PersonFactory;
 import com.zipcodewilmington.streams.tools.RandomUtils;
 import com.zipcodewilmington.streams.tools.StringUtils;
 
+import java.util.Arrays;
 import java.util.List;
+import java.util.function.Predicate;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import static com.zipcodewilmington.streams.anthropoid.PersonFactory.createPersonStream;
+import static com.zipcodewilmington.streams.tools.RandomUtils.createCharacter;
+
 /**
  * Created by leon on 5/2/17.
  */
@@ -20,7 +25,7 @@ public class StreamFilter {
      * No arg constructor
      */ //TODO - construct person stream of 100 person objects; startingCharacter is a random capital letter
     public StreamFilter() {
-        this(Stream.empty(), null);
+        this(createPersonStream(100), createCharacter('A', 'Z'));
     }
 
     /**
@@ -28,7 +33,7 @@ public class StreamFilter {
      * @param startingCharacter - character to filter by
      */ //TODO
     public StreamFilter(Person[] people, Character startingCharacter) {
-        this(Stream.empty(), null);
+        this(Arrays.stream(people), startingCharacter);
     }
 
     /**
@@ -36,7 +41,7 @@ public class StreamFilter {
      * @param startingCharacter - character to filter by
      */ //TODO
     public StreamFilter(List<Person> people, Character startingCharacter) {
-        this(Stream.empty(), null);
+        this(people.stream(), startingCharacter);
     }
 
 
@@ -55,7 +60,11 @@ public class StreamFilter {
      * @return a list of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public List<Person> toListMultiLine() {
-        return null;
+        Predicate<Person> guy = person -> {
+            String name = person.getName();
+            return name.equalsIgnoreCase(this.startingCharacter);
+        };
+        return personStream.filter(guy).collect(Collectors.toList());
     }
 
 
@@ -64,7 +73,7 @@ public class StreamFilter {
      * @return a list of person objects whose name starts with `this.startingCharacter`
      */ //TODO
     public List<Person> toListOneLine() {
-        return null;
+        return this.personStream.filter(person -> person.getName().equalsIgnoreCase(this.startingCharacter)).collect(Collectors.toList());
     }
 
 
@@ -73,7 +82,7 @@ public class StreamFilter {
      * @return an array of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public Person[] toArrayOneLine() {
-        return null;
+        return this.personStream.filter(person -> person.getName().equalsIgnoreCase(this.startingCharacter)).toArray(Person[]::new);
     }
 
 
@@ -82,7 +91,11 @@ public class StreamFilter {
      * @return an array of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public Person[] toArrayMultiLine() {
-        return null;
+        Predicate<Person> guy = person -> {
+            String name = person.getName();
+            return name.equalsIgnoreCase(this.startingCharacter);
+        };
+        return personStream.filter(guy).toArray(Person[]::new);
     }
 
 }

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

@@ -18,7 +18,7 @@ public class StreamMap {
      * @return - a Stream of single characters
      */ //TODO
     public static Stream<String> letters(String someWord) {
-        return null;
+        return Arrays.stream(someWord.split(""));
     }
 
     /**
@@ -26,7 +26,7 @@ public class StreamMap {
      * @return - a Stream of several Streams of single characters
      */ //TODO
     public static Stream<Stream<String>> wordsMap(String... someWords) {
-        return null;
+        return Arrays.stream(someWords).map(StreamMap::letters);
     }
 
     /**
@@ -34,6 +34,6 @@ public class StreamMap {
      * @return - a Stream of several Streams of single characters
      */ //TODO
     public static Stream<String> wordsFlatMap(String... stringArray) {
-        return null;
+        return Arrays.stream(stringArray).flatMap(StreamMap::letters);
     }
 }

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

@@ -3,6 +3,7 @@ package com.zipcodewilmington.streams.anthropoid;
 import com.zipcodewilmington.streams.tools.RandomUtils;
 import com.zipcodewilmington.streams.tools.StringUtils;
 
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 import java.util.stream.Collectors;
@@ -39,7 +40,8 @@ public final class PersonFactory {
      * @return - ArrayList of Person objects
      */ // TODO
     public static List<Person> createPersonList(int listSize) {
-        return null;
+        Stream<Person>rosterBuilder = Stream.generate(() -> createRandomPerson()).limit(listSize);
+        return rosterBuilder.collect(Collectors.toList());
     }
 
 
@@ -48,7 +50,8 @@ public final class PersonFactory {
      * @return - Array of Person objects
      */ // TODO
     public static Person[] createPersonArray(int arrayLength) {
-        return null;
+        Stream<Person>rosterBuilder = Stream.generate(() -> createRandomPerson()).limit(arrayLength);
+        return rosterBuilder.toArray(size -> new Person[size]);
     }
 
 
@@ -58,6 +61,6 @@ public final class PersonFactory {
      * @return - Stream representation of collection of Person objects
      */ // TODO
     public static Stream<Person> createPersonStream(int streamCount) {
-        return null;
+        return Stream.generate(() -> createRandomPerson()).limit(streamCount);
     }
 }

src/main/java/com/zipcodewilmington/streams/anthropoid/PersonWarehouse.java

@@ -35,7 +35,7 @@ public final class PersonWarehouse {
      * @return list of uniquely named Person objects
      */ //TODO
     public static Stream<Person> getUniquelyNamedPeople() {
-        return null;
+        return people.stream().distinct();
     }
 
 
@@ -44,7 +44,7 @@ public final class PersonWarehouse {
      * @return a Stream of respective
      */ //TODO
     public static Stream<Person> getUniquelyNamedPeopleStartingWith(Character character) {
-        return null;
+        return people.stream().filter(person -> person.getName().startsWith(character.toString())).distinct();
     }
 
     /**
@@ -52,14 +52,15 @@ public final class PersonWarehouse {
      * @return a Stream of respective
      */ //TODO
     public static Stream<Person> getFirstNUniquelyNamedPeople(int n) {
-        return null;
+
+        return people.stream().distinct().limit(n);
     }
 
     /**
      * @return a mapping of Person Id to the respective Person name
      */ // TODO
     public static Map<Long, String> getIdToNameMap() {
-        return null;
+        return people.stream().collect(Collectors.toMap(Person::getPersonalId, Person::getName));
     }
 
 
@@ -67,7 +68,7 @@ public final class PersonWarehouse {
      * @return Stream of Stream of Aliases
      */ // TODO
     public static Stream<Stream<String>> getNestedAliases() {
-        return null;
+        return people.stream().map(person -> Stream.of(person.getAliases()));
     }
 
 
@@ -75,14 +76,14 @@ public final class PersonWarehouse {
      * @return Stream of all Aliases
      */ // TODO
     public static Stream<String> getAllAliases() {
-        return null;
+        return  people.stream().map(person -> person.getAliases().toString());
     }
 
     /**
      * @return list of names of Person objects
      */ // TODO
     public static List<String> getNames() {
-        return null;
+        return  people.stream().map(person -> person.getName()).collect(Collectors.toList());
     }
 
     /**

src/main/java/com/zipcodewilmington/streams/conversions/ArrayConverter.java

@@ -23,12 +23,12 @@ public final class ArrayConverter extends PersonConversionAgent<Person[]> {
 
     //TODO
     public List<Person> toList() {
-        return null;
+        return Arrays.asList(toArray());
     }
 
     //TODO
     public Stream<Person> toStream() {
-        return null;
+        return Arrays.stream(toArray());
     }
 
     @Override

src/main/java/com/zipcodewilmington/streams/conversions/ListConverter.java

@@ -3,6 +3,7 @@ package com.zipcodewilmington.streams.conversions;
 import com.zipcodewilmington.streams.anthropoid.Person;
 import com.zipcodewilmington.streams.anthropoid.PersonFactory;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Stream;
 
@@ -27,11 +28,11 @@ public final class ListConverter extends PersonConversionAgent<List<Person>> {
 
     //TODO
     public Stream<Person> toStream() {
-        return null;
+        return toList().stream();
     }
 
     //TODO
     public Person[] toArray() {
-        return null;
+        return toStream().toArray(Person[]::new);
     }
 }

src/main/java/com/zipcodewilmington/streams/conversions/StreamConverter.java

@@ -3,6 +3,7 @@ package com.zipcodewilmington.streams.conversions;
 import com.zipcodewilmington.streams.anthropoid.Person;
 import com.zipcodewilmington.streams.anthropoid.PersonFactory;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -25,16 +26,16 @@ public final class StreamConverter extends PersonConversionAgent<Stream<Person>>
 
     // TODO
     public List<Person> toList() {
-        return null;
+        return toStream().collect(Collectors.toList());
     }
 
     // TODO
     public Stream<Person> toStream() {
-        return null;
+        return Arrays.stream(toArray());
     }
 
     // TODO
     public Person[] toArray() {
-        return null;
+        return personList.stream().toArray(Person[]::new);
     }
 }

target/global.leonlog

@@ -1,2 +1,2 @@
-May 31, 2017 4:45:59 PM com.zipcodewilmington.streams.tools.logging.LoggerHandler log
+Jul 03, 2018 3:31:01 PM com.zipcodewilmington.streams.tools.logging.LoggerHandler log
 INFO: Instantiating logger for [ com.zipcodewilmington.streams.anthropoid.PersonWarehouse ] ...