.idea/compiler.xml

@@ -7,10 +7,11 @@
         <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

@@ -20,7 +20,7 @@ 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(PersonFactory.createPersonStream(100), RandomUtils.createCharacter('A','Z'));
     }
 
     /**
@@ -28,7 +28,7 @@ public class StreamFilter {
      * @param startingCharacter - character to filter by
      */ //TODO
     public StreamFilter(Person[] people, Character startingCharacter) {
-        this(Stream.empty(), null);
+        this(Stream.of(people), startingCharacter);
     }
 
     /**
@@ -36,7 +36,7 @@ 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 +55,7 @@ public class StreamFilter {
      * @return a list of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public List<Person> toListMultiLine() {
-        return null;
+        return personStream.filter(person->person.getName().equalsIgnoreCase(startingCharacter)).collect(Collectors.toList());
     }
 
 
@@ -64,7 +64,7 @@ public class StreamFilter {
      * @return a list of person objects whose name starts with `this.startingCharacter`
      */ //TODO
     public List<Person> toListOneLine() {
-        return null;
+        return personStream.filter(person -> StringUtils.isPalindromeIgnoreCase(person.name)).collect(Collectors.toList());
     }
 
 
@@ -73,7 +73,7 @@ public class StreamFilter {
      * @return an array of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public Person[] toArrayOneLine() {
-        return null;
+        return personStream.filter(person -> person.getName().equalsIgnoreCase(startingCharacter)).toArray(Person[]::new);
     }
 
 
@@ -82,7 +82,7 @@ public class StreamFilter {
      * @return an array of person object whose name starts with `this.startingCharacter`
      */ //TODO
     public Person[] toArrayMultiLine() {
-        return null;
+        return toArrayOneLine();
     }
 
 }

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

@@ -1,11 +1,14 @@
 package com.zipcodewilmington.streams.anthropoid;
 
+import com.sun.deploy.perf.PerfRollup;
 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;
+import java.util.stream.IntStream;
 import java.util.stream.Stream;
 
 /**
@@ -39,7 +42,8 @@ public final class PersonFactory {
      * @return - ArrayList of Person objects
      */ // TODO
     public static List<Person> createPersonList(int listSize) {
-        return null;
+        return createPersonStream(listSize).collect(Collectors.toList());
+//        return null;
     }
 
 
@@ -48,7 +52,9 @@ public final class PersonFactory {
      * @return - Array of Person objects
      */ // TODO
     public static Person[] createPersonArray(int arrayLength) {
-        return null;
+        return createPersonList(arrayLength).toArray(new Person[arrayLength]);
+
+       // return Stream.generate(PersonFactory::createRandomPerson).limit(arrayLength).toArray(Person[]::new);
     }
 
 
@@ -58,6 +64,6 @@ 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(PersonFactory::createRandomPerson).limit(streamCount);
     }
 }

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

@@ -7,6 +7,11 @@ import com.zipcodewilmington.streams.tools.logging.LoggerWarehouse;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Function;
+import java.util.function.Predicate;
+import java.util.stream.Collector;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
@@ -31,11 +36,20 @@ public final class PersonWarehouse {
         people.add(person);
     }
 
+    public static<T>Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor){
+        Set<Object> sen = ConcurrentHashMap.newKeySet();
+        return t -> sen.add(keyExtractor.apply(t));
+    }
+
+
+
     /**
      * @return list of uniquely named Person objects
      */ //TODO
     public static Stream<Person> getUniquelyNamedPeople() {
-        return null;
+//        Stream<String> personNames = people.stream().map(person -> person.getName());
+        return people.stream().filter(distinctByKey(Person::getName));
+
     }
 
 
@@ -44,7 +58,7 @@ public final class PersonWarehouse {
      * @return a Stream of respective
      */ //TODO
     public static Stream<Person> getUniquelyNamedPeopleStartingWith(Character character) {
-        return null;
+        return getUniquelyNamedPeople().filter(person -> person.name.charAt(0) == character);
     }
 
     /**
@@ -52,13 +66,16 @@ public final class PersonWarehouse {
      * @return a Stream of respective
      */ //TODO
     public static Stream<Person> getFirstNUniquelyNamedPeople(int n) {
-        return null;
+        return getUniquelyNamedPeople().limit(n);
     }
 
     /**
      * @return a mapping of Person Id to the respective Person name
      */ // TODO
     public static Map<Long, String> getIdToNameMap() {
+
+        people.stream().collect(Collectors.toMap(p -> p.getPersonalId(),p -> p.getName()));
+
         return null;
     }
 
@@ -82,7 +99,7 @@ public final class PersonWarehouse {
      * @return list of names of Person objects
      */ // TODO
     public static List<String> getNames() {
-        return null;
+        return people.stream().map(Person::getName).collect(Collectors.toList());
     }
 
     /**

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

@@ -5,6 +5,7 @@ import com.zipcodewilmington.streams.anthropoid.PersonFactory;
 
 import java.util.Arrays;
 import java.util.List;
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
 /**
@@ -23,16 +24,18 @@ public final class ArrayConverter extends PersonConversionAgent<Person[]> {
 
     //TODO
     public List<Person> toList() {
-        return null;
+
+        return Arrays.stream(super.objectSequence).collect(Collectors.toList());
     }
 
     //TODO
     public Stream<Person> toStream() {
-        return null;
+        return Arrays.stream(super.objectSequence);
     }
 
     @Override
     public Person[] toArray() {
+
         return super.objectSequence;
     }
 }

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

@@ -27,11 +27,12 @@ public final class ListConverter extends PersonConversionAgent<List<Person>> {
 
     //TODO
     public Stream<Person> toStream() {
-        return null;
+
+        return super.objectSequence.stream();
     }
 
     //TODO
     public Person[] toArray() {
-        return null;
+        return super.objectSequence.stream().toArray(Person[]::new);
     }
 }

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

@@ -25,16 +25,16 @@ public final class StreamConverter extends PersonConversionAgent<Stream<Person>>
 
     // TODO
     public List<Person> toList() {
-        return null;
+        return personList;
     }
 
     // TODO
     public Stream<Person> toStream() {
-        return null;
+        return personList.stream();
     }
 
     // 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
+Nov 21, 2018 1:13:47 PM com.zipcodewilmington.streams.tools.logging.LoggerHandler log
 INFO: Instantiating logger for [ com.zipcodewilmington.streams.anthropoid.PersonWarehouse ] ...