impl

.idea/jarRepositories.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="MavenRepo" />
+      <option name="name" value="MavenRepo" />
+      <option name="url" value="https://repo.maven.apache.org/maven2/" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_9" project-jdk-name="9" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

build.gradle

@@ -0,0 +1,18 @@
+plugins {
+    id 'java'
+}
+
+group 'org.example'
+version '1.0-SNAPSHOT'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile group: 'javax.json.bind', name: 'javax.json.bind-api', version: '1.0'
+    compile group: 'org.glassfish', name: 'javax.json', version: '1.1.2'
+    compile group: 'org.eclipse', name: 'yasson', version: '1.0.1'
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = 'projekt_2'
+

src/main/java/com/projekt2/ApiException.java

@@ -0,0 +1,11 @@
+package com.projekt2;
+
+public class ApiException extends RuntimeException {
+    public ApiException(Throwable cause) {
+        super(cause);
+    }
+
+    public ApiException(String message) {
+        super(message);
+    }
+}

src/main/java/com/projekt2/ConnectionFactory.java

@@ -0,0 +1,7 @@
+package com.projekt2;
+
+public class ConnectionFactory {
+    public HttpConnection build(String url) {
+        return new HttpConnection(url);
+    }
+}

src/main/java/com/projekt2/ExchangeApi.java

@@ -0,0 +1,13 @@
+package com.projekt2;
+
+import java.math.BigDecimal;
+
+public interface ExchangeApi {
+    /**
+     * @param currencyCode currency code that should be checked, for example USD
+     * @return excahge rate between PLN and currencyCode on date
+     */
+    BigDecimal exchangeRate(String currencyCode);
+
+
+}

src/main/java/com/projekt2/HttpConnection.java

@@ -0,0 +1,53 @@
+package com.projekt2;
+
+import java.io.BufferedReader;
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class HttpConnection implements Closeable {
+
+    private final HttpURLConnection connection;
+
+    HttpConnection(String url) {
+        try {
+            connection = (HttpURLConnection) new URL(url).openConnection();
+        } catch (IOException e) {
+            throw new ApiException(e);
+        }
+    }
+
+    String response() {
+        validateResponse();
+        StringBuilder response = new StringBuilder();
+        try (BufferedReader responseReader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
+            String line;
+            while ((line = responseReader.readLine()) != null) {
+                response.append(line);
+            }
+        } catch (IOException e) {
+            throw new ApiException(e);
+        }
+        return response.toString();
+    }
+
+    @Override
+    public void close() {
+        connection.disconnect();
+    }
+
+    void validateResponse() {
+        try {
+            int responseCode = connection.getResponseCode();
+            if (responseCode != 200) {
+                String responseMessage = connection.getResponseMessage();
+                throw new ApiException(String.format("Something went wrong! [%d] %s", responseCode, responseMessage));
+            }
+        } catch (IOException e) {
+            throw new ApiException(e);
+        }
+    }
+
+}

src/main/java/com/projekt2/NbpApi.java

@@ -0,0 +1,55 @@
+package com.projekt2;
+
+import com.projekt2.nbp.CurrencyDetails;
+
+import javax.json.bind.Jsonb;
+import javax.json.bind.JsonbBuilder;
+import java.math.BigDecimal;
+import java.util.Scanner;
+
+public class NbpApi implements ExchangeApi {
+
+    public static void main(String[] args) {
+        NbpApi nbpApi = new NbpApi();
+        Scanner scanner = new Scanner(System.in);
+        nbpApi.getCurrencyCodeFromUser(scanner, nbpApi);
+    }
+
+    public void getCurrencyCodeFromUser(Scanner scanner, NbpApi nbpApi) {
+        System.out.println("Podaj kod waluty: ");
+        String currency = scanner.nextLine();
+
+        BigDecimal rate = nbpApi.exchangeRate(currency.toUpperCase());
+        if (rate != null) {
+            System.out.println("Dzisiejszy kurs EUR/" + currency.toUpperCase() + " to: " + rate);
+        } else {
+            System.out.println("Brak waluty o podanym kodzie. Czy chcesz podać inny kod ? (Y/N)");
+            if (scanner.nextLine().equalsIgnoreCase("y")) {
+                getCurrencyCodeFromUser(scanner, nbpApi);
+            }
+        }
+    }
+
+    private static final String API_URL_TEMPLATE = "https://api.exchangeratesapi.io/latest";
+
+    private final ConnectionFactory connectionFactory;
+    private final Jsonb jsonb;
+
+    public NbpApi() {
+        this(new ConnectionFactory(), JsonbBuilder.create());
+    }
+
+    public NbpApi(ConnectionFactory connectionFactory, Jsonb jsonb) {
+        this.connectionFactory = connectionFactory;
+        this.jsonb = jsonb;
+    }
+
+    @Override
+    public BigDecimal exchangeRate(String currencyCode) {
+        try (HttpConnection connection = connectionFactory.build(API_URL_TEMPLATE)) {
+            String response = connection.response();
+            CurrencyDetails currencyDetails = jsonb.fromJson(response, CurrencyDetails.class);
+            return currencyDetails.getRates().get(currencyCode);
+        }
+    }
+}

src/main/java/com/projekt2/nbp/CurrencyDetails.java

@@ -0,0 +1,44 @@
+package com.projekt2.nbp;
+
+import java.math.BigDecimal;
+import java.util.Map;
+
+public class CurrencyDetails {
+
+    private String date;
+    private String base;
+    private Map<String, BigDecimal> rates;
+
+    public String getDate() {
+        return date;
+    }
+
+    public void setDate(String date) {
+        this.date = date;
+    }
+
+    public String getBase() {
+        return base;
+    }
+
+    public void setBase(String base) {
+        this.base = base;
+    }
+
+    public Map<String, BigDecimal> getRates() {
+        return rates;
+    }
+
+    public void setRates(Map<String, BigDecimal> rates) {
+        this.rates = rates;
+    }
+
+    @Override
+    public String toString() {
+        return "CurrencyDetails{" +
+                "date='" + date + '\'' +
+                ", base='" + base + '\'' +
+                ", rates=" + rates +
+                '}';
+    }
+}

src/main/java/com/projekt2/nbp/CurrencyRate.java

@@ -0,0 +1,31 @@
+package com.projekt2.nbp;
+
+import javax.json.bind.annotation.JsonbProperty;
+import java.math.BigDecimal;
+
+public class CurrencyRate {
+
+    @JsonbProperty("mid")
+    private BigDecimal rate;
+    @JsonbProperty("no")
+    private String id;
+
+    public CurrencyRate() {
+    }
+
+    public BigDecimal getRate() {
+        return rate;
+    }
+
+    public void setRate(BigDecimal rate) {
+        this.rate = rate;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+}