Brest-Java-Course-2021-2 · Shurik-Yankovich · Oct 15, 2021 · Oct 15, 2021 · Oct 15, 2021 · Oct 20, 2021
diff --git a/documentation/html_template/index.html b/documentation/html_template/index.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Hello</title>
+</head>
+<body>
+<h1>Hello my friend!</h1>
+<p>ab<b>ra</b><br/>
+    ka<strong>dab</strong>rak<br/>
+    11111&nbsp;kkjlf&copy;
+    <i>yyy<strike>yyyu</strike>uu</i>
+    <em>wuy<sup>eiu</sup>wbw</em>
+    df</p>
+</body>
+</html>
diff --git a/pom.xml b/pom.xml
@@ -11,6 +11,41 @@
     <properties>
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
+        <spring.version>5.3.12</spring.version>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-core</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-beans</artifactId>
+            <version>${spring.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.0.0-M5</version>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>
diff --git a/src/main/java/com/epam/brest/Main.java b/src/main/java/com/epam/brest/Main.java
@@ -1,30 +1,38 @@
 package com.epam.brest;
 
-import com.epam.brest.calc.CalcImpl;
+import com.epam.brest.files.CSVFileReader;
+import com.epam.brest.files.FileReader;
+import com.epam.brest.model.ReadDataState;
+import com.epam.brest.model.Status;
+import com.epam.brest.model.StatusType;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
 
+import java.io.IOException;
 import java.math.BigDecimal;
+import java.util.Map;
 import java.util.Scanner;
 
 public class Main {
 
-    public static void main(String[] args) {
-        BigDecimal weight, pricePerKg, length, pricePerKm;
+    public static void main(String[] arg) throws IOException {
+        //result = weight*pricePerKg + km*pricePerKm;
+
+        ApplicationContext applicationContext
+                = new ClassPathXmlApplicationContext("spring-config.xml");
+        FileReader fileReader = (FileReader) applicationContext.getBean("fileReader");
+
+        Map<Integer, BigDecimal> pricePerKgMap = fileReader.readData("price_weight.csv");
+        Map<Integer, BigDecimal> pricePerKmMap = fileReader.readData("price_distance.csv");
+
         try (Scanner scanner = new Scanner(System.in)) {
-            do {
-                weight = getValueFromCon(scanner, "Enter weight:");
-                pricePerKg = getValueFromCon(scanner, "Enter pricePerKg:");
-                length = getValueFromCon(scanner, "Enter length:");
-                pricePerKm = getValueFromCon(scanner, "Enter pricePerKm:");
-                System.out.println("Result:" + new CalcImpl().handle(weight, pricePerKg, length, pricePerKm));
-                System.out.println("Enter 'q' for exit or 'c' to continue:");
-            } while (scanner.next().equals("c"));
+            Status currentStatus = new ReadDataState(scanner, pricePerKgMap, pricePerKmMap);
+            while (currentStatus.getType() != StatusType.EXIT) {
+                System.out.println("Current system status: " + currentStatus.getType());
+                currentStatus = currentStatus.handle();
+            }
         }
     }
 
-    private static BigDecimal getValueFromCon(Scanner scanner, String outputMessage) {
-        BigDecimal enteredValue;
-        System.out.print(outputMessage);
-        enteredValue = scanner.nextBigDecimal();
-        return enteredValue;
-    }
 }
+
diff --git a/src/main/java/com/epam/brest/calc/CalcImpl.java b/src/main/java/com/epam/brest/calc/CalcImpl.java
@@ -6,6 +6,9 @@ public class CalcImpl implements Calc {
 
     @Override
     public BigDecimal handle(BigDecimal weight, BigDecimal pricePerKg, BigDecimal length, BigDecimal pricePerKm) {
+        if (weight == null || pricePerKg == null || length == null || pricePerKm == null) {
+            throw new IllegalArgumentException("Parameter should not be NULL");
+        }
         return weight.multiply(pricePerKg).add(length.multiply(pricePerKm));
     }
 }
diff --git a/src/main/java/com/epam/brest/files/CSVFileReader.java b/src/main/java/com/epam/brest/files/CSVFileReader.java
@@ -0,0 +1,29 @@
+package com.epam.brest.files;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.math.BigDecimal;
+import java.util.Map;
+import java.util.TreeMap;
+
+public class CSVFileReader implements FileReader {
+
+    @Override
+    public Map<Integer, BigDecimal> readData(String filePath) throws IOException {
+        Map<Integer, BigDecimal> resultMap = new TreeMap<>();
+        InputStream inputStream = getClass().getResourceAsStream("/" + filePath);
+        try (InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
+             BufferedReader bufferedReader = new BufferedReader(inputStreamReader)) {
+            String line;
+            String[] values;
+            while ((line = bufferedReader.readLine()) != null) {
+                values = line.split(",");
+                resultMap.put(Integer.valueOf(values[0]), new BigDecimal(values[1]));
+            }
+        }
+        return resultMap;
+    }
+}
+
diff --git a/src/main/java/com/epam/brest/files/FileReader.java b/src/main/java/com/epam/brest/files/FileReader.java
@@ -0,0 +1,10 @@
+package com.epam.brest.files;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+import java.util.Map;
+
+public interface FileReader {
+
+    Map<Integer, BigDecimal> readData(String filePath) throws IOException;
+}
diff --git a/src/main/java/com/epam/brest/model/AbstractStatus.java b/src/main/java/com/epam/brest/model/AbstractStatus.java
@@ -0,0 +1,13 @@
+package com.epam.brest.model;
+
+import java.math.BigDecimal;
+import java.util.Map;
+import java.util.Scanner;
+
+public abstract class AbstractStatus implements Status {
+
+    Scanner scanner;
+    Map<Integer, BigDecimal> pricePerKgMap;
+    Map<Integer, BigDecimal> pricePerKmMap;
+
+}
diff --git a/src/main/java/com/epam/brest/model/CalcState.java b/src/main/java/com/epam/brest/model/CalcState.java
@@ -0,0 +1,39 @@
+package com.epam.brest.model;
+
+import com.epam.brest.calc.CalcImpl;
+import com.epam.brest.selector.PriceSelector;
+
+import java.math.BigDecimal;
+import java.util.Map;
+import java.util.Scanner;
+
+import static com.epam.brest.model.StatusType.CALC;
+
+public class CalcState extends AbstractStatus {
+
+    public CalcState(Scanner scanner, Map<Integer, BigDecimal> pricePerKgMap, Map<Integer, BigDecimal> pricePerKmMap) {
+        this.scanner = scanner;
+        this.pricePerKgMap = pricePerKgMap;
+        this.pricePerKmMap = pricePerKmMap;
+    }
+
+    @Override
+    public Status handle() {
+
+        try {
+            BigDecimal pricePerKg = new PriceSelector().selectPriceValue(pricePerKgMap, userData.get(0));
+            BigDecimal pricePerKm = new PriceSelector().selectPriceValue(pricePerKmMap, userData.get(1));
+            BigDecimal result = new CalcImpl().handle(pricePerKg, userData.get(0), pricePerKm, userData.get(1));
+            System.out.println("Result: " + result);
+        } finally {
+            userData.clear();
+        }
+
+        return new ReadDataState(scanner, pricePerKgMap, pricePerKmMap);
+    }
+
+    @Override
+    public StatusType getType() {
+        return CALC;
+    }
+}
diff --git a/src/main/java/com/epam/brest/model/ExitState.java b/src/main/java/com/epam/brest/model/ExitState.java
@@ -0,0 +1,16 @@
+package com.epam.brest.model;
+
+import static com.epam.brest.model.StatusType.*;
+
+public class ExitState implements Status {
+
+    @Override
+    public Status handle() {
+        return null;
+    }
+
+    @Override
+    public StatusType getType() {
+        return EXIT;
+    }
+}
diff --git a/src/main/java/com/epam/brest/model/ReadDataState.java b/src/main/java/com/epam/brest/model/ReadDataState.java
@@ -0,0 +1,49 @@
+package com.epam.brest.model;
+
+import java.math.BigDecimal;
+import java.util.Map;
+import java.util.Scanner;
+
+import static com.epam.brest.model.StatusType.READ_DATA;
+
+public class ReadDataState extends AbstractStatus {
+
+    public static final int NUMBER_OF_USER_DATA = 2;
+
+    public ReadDataState(Scanner scanner, Map<Integer, BigDecimal> pricePerKgMap, Map<Integer, BigDecimal> pricePerKmMap) {
+        this.scanner = scanner;
+        this.pricePerKgMap = pricePerKgMap;
+        this.pricePerKmMap = pricePerKmMap;
+    }
+
+    @Override
+    public Status handle() {
+        if (userData.size() < NUMBER_OF_USER_DATA) {
+            System.out.println(messages.get(userData.size()));
+            String inputValue = scanner.next();
+            if (inputValue.equalsIgnoreCase("q")) {
+                return new ExitState();
+            } else if (isCorrectValue(inputValue)) {
+                userData.add(new BigDecimal(inputValue));
+            }
+        } else {
+            return new CalcState(scanner, pricePerKgMap, pricePerKmMap);
+        }
+        return this;
+    }
+
+    private boolean isCorrectValue(String inputValue) {
+        try {
+            BigDecimal enteredValue = new BigDecimal(inputValue);
+            return enteredValue.doubleValue() > 0;
+        } catch (NumberFormatException nfe) {
+            System.out.println("Incorrect value: " + inputValue);
+        }
+        return false;
+    }
+
+    @Override
+    public StatusType getType() {
+        return READ_DATA;
+    }
+}
diff --git a/src/main/java/com/epam/brest/model/Status.java b/src/main/java/com/epam/brest/model/Status.java
@@ -0,0 +1,17 @@
+package com.epam.brest.model;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public interface Status {
+
+    List<String> messages = new ArrayList<>(Arrays.asList("Please enter weight:", "Please enter distance:"));
+    List<BigDecimal> userData = new ArrayList<>();
+
+    Status handle();
+
+    StatusType getType();
+
+}
diff --git a/src/main/java/com/epam/brest/model/StatusType.java b/src/main/java/com/epam/brest/model/StatusType.java
@@ -0,0 +1,5 @@
+package com.epam.brest.model;
+
+public enum StatusType {
+    READ_DATA, CALC, EXIT
+}
diff --git a/src/main/java/com/epam/brest/selector/PriceSelector.java b/src/main/java/com/epam/brest/selector/PriceSelector.java
@@ -0,0 +1,24 @@
+package com.epam.brest.selector;
+
+import java.math.BigDecimal;
+import java.util.Map;
+import java.util.SortedSet;
+import java.util.TreeSet;
+
+public class PriceSelector {
+
+    public BigDecimal selectPriceValue(Map<Integer, BigDecimal> valueMap, BigDecimal targetValue) {
+        SortedSet<Integer> sortedKeys = new TreeSet<>(valueMap.keySet());
+        Integer resultKey = sortedKeys.first();
+        for (Integer key : sortedKeys) {
+            if (resultKey >= targetValue.doubleValue()) {
+                break;
+            }
+            resultKey = key;
+        }
+
+        BigDecimal resultValue = valueMap.get(resultKey);
+        System.out.println("Value: " + targetValue + " -> " + resultValue);
+        return resultValue;
+    }
+}
diff --git a/src/main/resources/config.properties b/src/main/resources/config.properties
@@ -0,0 +1,7 @@
+pricePerKg_10=1
+pricePerKg_20=2
+pricePerKg_default=3
+
+pricePerKm_10=4
+pricePerKm_20=5
+pricePerKm_default=6
diff --git a/src/main/resources/price_distance.csv b/src/main/resources/price_distance.csv
@@ -0,0 +1,4 @@
+100,100
+200,190
+500,150
+1000,100
diff --git a/src/main/resources/price_weight.csv b/src/main/resources/price_weight.csv
@@ -0,0 +1,3 @@
+1000,10
+2000,20
+3000,300
diff --git a/src/main/resources/spring-config.xml b/src/main/resources/spring-config.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans
+    https://www.springframework.org/schema/beans/spring-beans.xsd">
+
+    <bean name="fileReader" class="com.epam.brest.files.CSVFileReader"/>
+    <bean name="calc" class="com.epam.brest.calc.CalcImpl"/>
+
+</beans>
-Original file line number
+Diff line change
@@ -0,0 +1,4 @@
+,100
+,190
+,150
+,100