mavenize project

mariofusco · mariofusco · commit b58c4c915f0c · 2013-11-01T20:26:42.000+01:00
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,13 @@
+/target
+/local
+
+# Eclipse, Netbeans and IntelliJ files
+/.*
+!.gitignore
+/nbproject
+/*.ipr
+/*.iws
+/*.iml
+
+# Repository wide ignore mac DS_Store files
+.DS_Store
diff --git a/pom.xml b/pom.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>manning</groupId>
+    <artifactId>lambdasinaction</artifactId>
+    <version>1.0</version>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.8.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <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>
+
+</project>
diff --git a/src/main/java/lambdasinaction/chap1/FilteringApples.java b/src/main/java/lambdasinaction/chap1/FilteringApples.java
@@ -1,5 +1,8 @@
+package lambdasinaction.chap1;
+
 import java.util.*;
 import java.util.function.Predicate;
+
 public class FilteringApples{
 
 	public static void main(String ... args){
diff --git a/src/main/java/lambdasinaction/chap2/FilteringApples.java b/src/main/java/lambdasinaction/chap2/FilteringApples.java
@@ -1,4 +1,7 @@
+package lambdasinaction.chap2;
+
 import java.util.*;
+
 public class FilteringApples{
 
 	public static void main(String ... args){
diff --git a/src/main/java/lambdasinaction/chap2/MeaningOfThis.java b/src/main/java/lambdasinaction/chap2/MeaningOfThis.java
@@ -1,3 +1,5 @@
+package lambdasinaction.chap2;
+
 public class MeaningOfThis
 {
 	public final int value = 4;
diff --git a/src/main/java/lambdasinaction/chap3/ExecuteAround.java b/src/main/java/lambdasinaction/chap3/ExecuteAround.java
@@ -1,3 +1,5 @@
+package lambdasinaction.chap3;
+
 import java.io.*;
 public class ExecuteAround {
 
@@ -11,7 +13,7 @@ public static void main(String ...args) throws IOException{
 	}
 
 	public static String processFile(BufferedReaderProcessor p) throws IOException {
-		try(BufferedReader br = new BufferedReader(new FileReader("data.txt"))){
+		try(BufferedReader br = new BufferedReader(new FileReader("src/main/java/lambdasinaction/chap3/data.txt"))){
 			return p.process(br);
 		}
 
diff --git a/src/main/java/lambdasinaction/chap3/Lambdas.java b/src/main/java/lambdasinaction/chap3/Lambdas.java
@@ -1,4 +1,7 @@
+package lambdasinaction.chap3;
+
 import java.util.*;
+
 public class Lambdas {
 	public static void main(String ...args){
 
diff --git a/src/main/java/lambdasinaction/chap3/Sorting.java b/src/main/java/lambdasinaction/chap3/Sorting.java
@@ -1,5 +1,8 @@
+package lambdasinaction.chap3;
+
 import java.util.*;
 import static java.util.Comparator.comparing;
+
 public class Sorting {
 
 	public static void main(String...args){
diff --git a/src/main/java/lambdasinaction/chap3/data.txt b/src/main/java/lambdasinaction/chap3/data.txt
diff --git a/src/main/java/lambdasinaction/chap5/Dish.java b/src/main/java/lambdasinaction/chap5/Dish.java
@@ -0,0 +1,38 @@
+package lambdasinaction.chap5;
+
+public class Dish {
+    private final String name;
+    private final boolean vegetarian;
+    private final int calories;
+    private final Type type;
+
+    public Dish(String name, boolean vegetarian, int calories, Type type) {
+        this.name = name;
+        this.vegetarian = vegetarian;
+        this.calories = calories;
+        this.type = type;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public boolean isVegetarian() {
+        return vegetarian;
+    }
+
+    public int getCalories() {
+        return calories;
+    }
+
+    public Type getType() {
+        return type;
+    }
+
+    public enum Type { MEAT, FISH, OTHER }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+}
diff --git a/src/main/java/lambdasinaction/chap5/GroupingTransactions.java b/src/main/java/lambdasinaction/chap5/GroupingTransactions.java
@@ -0,0 +1,74 @@
+package lambdasinaction.chap5;
+
+import java.util.*;
+
+import static java.util.stream.Collectors.groupingBy;
+
+public class GroupingTransactions {
+
+    public static List<Transaction> transactions = Arrays.asList( new Transaction(Currency.EUR, 1500.0),
+                                                                  new Transaction(Currency.USD, 2300.0),
+                                                                  new Transaction(Currency.GBP, 9900.0),
+                                                                  new Transaction(Currency.EUR, 1100.0),
+                                                                  new Transaction(Currency.JPY, 7800.0),
+                                                                  new Transaction(Currency.CHF, 6700.0),
+                                                                  new Transaction(Currency.EUR, 5600.0),
+                                                                  new Transaction(Currency.USD, 4500.0),
+                                                                  new Transaction(Currency.CHF, 3400.0),
+                                                                  new Transaction(Currency.GBP, 3200.0),
+                                                                  new Transaction(Currency.USD, 4600.0),
+                                                                  new Transaction(Currency.JPY, 5700.0),
+                                                                  new Transaction(Currency.EUR, 6800.0) );
+    public static void main(String ... args) {
+        groupImperatively();
+        groupFunctionally();
+
+    }
+
+    private static void groupImperatively() {
+        Map<Currency, List<Transaction>> transactionsByCurrencies = new HashMap<>();
+        for (Transaction transaction : transactions) {
+            Currency currency = transaction.getCurrency();
+            List<Transaction> transactionsForCurrency = transactionsByCurrencies.get(currency);
+            if (transactionsForCurrency == null) {
+                    transactionsForCurrency = new ArrayList<>();
+                transactionsByCurrencies.put(currency, transactionsForCurrency);
+            }
+            transactionsForCurrency.add(transaction);
+        }
+
+        System.out.println(transactionsByCurrencies);
+    }
+
+    private static void groupFunctionally() {
+        Map<Currency, List<Transaction>> transactionsByCurrencies = transactions.stream().collect(groupingBy(Transaction::getCurrency));
+        System.out.println(transactionsByCurrencies);
+    }
+
+    public static class Transaction {
+        private final Currency currency;
+        private final double value;
+
+        public Transaction(Currency currency, double value) {
+            this.currency = currency;
+            this.value = value;
+        }
+
+        public Currency getCurrency() {
+            return currency;
+        }
+
+        public double getValue() {
+            return value;
+        }
+
+        @Override
+        public String toString() {
+            return currency + " " + value;
+        }
+    }
+
+    public enum Currency {
+        EUR, USD, JPY, GBP, CHF
+    }
+}

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+package lambdasinaction.chap2;`
	`2`	`+`
`1`	`3`	`public class MeaningOfThis`
`2`	`4`	`{`
`3`	`5`	`public final int value = 4;`
Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,5 @@`
	`1`	`+package lambdasinaction.chap3;`
	`2`	`+`
`1`	`3`	`import java.io.*;`
`2`	`4`	`public class ExecuteAround {`
`3`	`5`
`@@ -11,7 +13,7 @@ public static void main(String ...args) throws IOException{`
`11`	`13`	`}`
`12`	`14`
`13`	`15`	`public static String processFile(BufferedReaderProcessor p) throws IOException {`
`14`		`- try(BufferedReader br = new BufferedReader(new FileReader("data.txt"))){`
	`16`	`+ try(BufferedReader br = new BufferedReader(new FileReader("src/main/java/lambdasinaction/chap3/data.txt"))){`
`15`	`17`	`return p.process(br);`
`16`	`18`	`}`
`17`	`19`