Add task07

task07/.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

task07/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.6/apache-maven-3.9.6-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

task07/Readme.md

@@ -0,0 +1,17 @@
+# Getting Started
+
+We're going to build a small application which displays continents and countries of the world.
+The frontend is already there, you need to integrate a GraphQL API to fetch the data from.
+You can access GraphiQL of this API with the url [https://countries.trevorblades.com/](https://countries.trevorblades.com/).
+
+Play around with the API and get familiar with available queries and the fields of the returned objects as well as the relations.
+
+# Task 07
+
+Let's develop a web app which displays continent and country information.
+You need to provide the needed GraphQL queries and configure the GraphQL Client to use the correct documents.
+
+1. Generate all necessary files (`maven compile`)
+2. Add the necessary GraphQL queries in the folder `graphql-documents`
+3. Configure the `CountryClient` by filling in the variables and documents
+4. Test the frontend if all information is displayed correctly

task07/mvnw

@@ -0,0 +1,308 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.2.0
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "$(uname)" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        JAVA_HOME="$(/usr/libexec/java_home)"; export JAVA_HOME
+      else
+        JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=$(java-config --jre-home)
+  fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=$(cygpath --unix "$JAVA_HOME")
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=$(cygpath --path --unix "$CLASSPATH")
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME" ] &&
+    JAVA_HOME="$(cd "$JAVA_HOME" || (echo "cannot cd into $JAVA_HOME."; exit 1); pwd)"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="$(which javac)"
+  if [ -n "$javaExecutable" ] && ! [ "$(expr "\"$javaExecutable\"" : '\([^ ]*\)')" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=$(which readlink)
+    if [ ! "$(expr "$readLink" : '\([^ ]*\)')" = "no" ]; then
+      if $darwin ; then
+        javaHome="$(dirname "\"$javaExecutable\"")"
+        javaExecutable="$(cd "\"$javaHome\"" && pwd -P)/javac"
+      else
+        javaExecutable="$(readlink -f "\"$javaExecutable\"")"
+      fi
+      javaHome="$(dirname "\"$javaExecutable\"")"
+      javaHome=$(expr "$javaHome" : '\(.*\)/bin')
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  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
+  else
+    JAVACMD="$(\unset -f command 2>/dev/null; \command -v java)"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=$(cd "$wdir/.." || exit 1; pwd)
+    fi
+    # end of workaround
+  done
+  printf '%s' "$(cd "$basedir" || exit 1; pwd)"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    # Remove \r in case we run on Windows within Git Bash
+    # and check out the repository with auto CRLF management
+    # enabled. Otherwise, we may read lines that are delimited with
+    # \r\n and produce $'-Xarg\r' rather than -Xarg due to word
+    # splitting rules.
+    tr -s '\r\n' ' ' < "$1"
+  fi
+}
+
+log() {
+  if [ "$MVNW_VERBOSE" = true ]; then
+    printf '%s\n' "$1"
+  fi
+}
+
+BASE_DIR=$(find_maven_basedir "$(dirname "$0")")
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
+log "$MAVEN_PROJECTBASEDIR"
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+wrapperJarPath="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar"
+if [ -r "$wrapperJarPath" ]; then
+    log "Found $wrapperJarPath"
+else
+    log "Couldn't find $wrapperJarPath, downloading it ..."
+
+    if [ -n "$MVNW_REPOURL" ]; then
+      wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    else
+      wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    fi
+    while IFS="=" read -r key value; do
+      # Remove '\r' from value to allow usage on windows as IFS does not consider '\r' as a separator ( considers space, tab, new line ('\n'), and custom '=' )
+      safeValue=$(echo "$value" | tr -d '\r')
+      case "$key" in (wrapperUrl) wrapperUrl="$safeValue"; break ;;
+      esac
+    done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+    log "Downloading from: $wrapperUrl"
+
+    if $cygwin; then
+      wrapperJarPath=$(cygpath --path --windows "$wrapperJarPath")
+    fi
+
+    if command -v wget > /dev/null; then
+        log "Found wget ... using wget"
+        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--quiet"
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget $QUIET "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        log "Found curl ... using curl"
+        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--silent"
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+        else
+            curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+        fi
+    else
+        log "Falling back to using Java to download"
+        javaSource="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        javaClass="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.class"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaSource=$(cygpath --path --windows "$javaSource")
+          javaClass=$(cygpath --path --windows "$javaClass")
+        fi
+        if [ -e "$javaSource" ]; then
+            if [ ! -e "$javaClass" ]; then
+                log " - Compiling MavenWrapperDownloader.java ..."
+                ("$JAVA_HOME/bin/javac" "$javaSource")
+            fi
+            if [ -e "$javaClass" ]; then
+                log " - Running MavenWrapperDownloader.java ..."
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$wrapperUrl" "$wrapperJarPath") || rm -f "$wrapperJarPath"
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+# If specified, validate the SHA-256 sum of the Maven wrapper jar file
+wrapperSha256Sum=""
+while IFS="=" read -r key value; do
+  case "$key" in (wrapperSha256Sum) wrapperSha256Sum=$value; break ;;
+  esac
+done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+if [ -n "$wrapperSha256Sum" ]; then
+  wrapperSha256Result=false
+  if command -v sha256sum > /dev/null; then
+    if echo "$wrapperSha256Sum  $wrapperJarPath" | sha256sum -c > /dev/null 2>&1; then
+      wrapperSha256Result=true
+    fi
+  elif command -v shasum > /dev/null; then
+    if echo "$wrapperSha256Sum  $wrapperJarPath" | shasum -a 256 -c > /dev/null 2>&1; then
+      wrapperSha256Result=true
+    fi
+  else
+    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available."
+    echo "Please install either command, or disable validation by removing 'wrapperSha256Sum' from your maven-wrapper.properties."
+    exit 1
+  fi
+  if [ $wrapperSha256Result = false ]; then
+    echo "Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised." >&2
+    echo "Investigate or delete $wrapperJarPath to attempt a clean download." >&2
+    echo "If you updated your Maven version, you need to update the specified wrapperSha256Sum property." >&2
+    exit 1
+  fi
+fi
+
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=$(cygpath --path --windows "$JAVA_HOME")
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=$(cygpath --path --windows "$CLASSPATH")
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=$(cygpath --path --windows "$MAVEN_PROJECTBASEDIR")
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $*"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+# shellcheck disable=SC2086 # safe args
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

task07/mvnw.cmd

@@ -0,0 +1,205 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.2.0
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set WRAPPER_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET WRAPPER_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET WRAPPER_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %WRAPPER_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%WRAPPER_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM If specified, validate the SHA-256 sum of the Maven wrapper jar file
+SET WRAPPER_SHA_256_SUM=""
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperSha256Sum" SET WRAPPER_SHA_256_SUM=%%B
+)
+IF NOT %WRAPPER_SHA_256_SUM%=="" (
+    powershell -Command "&{"^
+       "$hash = (Get-FileHash \"%WRAPPER_JAR%\" -Algorithm SHA256).Hash.ToLower();"^
+       "If('%WRAPPER_SHA_256_SUM%' -ne $hash){"^
+       "  Write-Output 'Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised.';"^
+       "  Write-Output 'Investigate or delete %WRAPPER_JAR% to attempt a clean download.';"^
+       "  Write-Output 'If you updated your Maven version, you need to update the specified wrapperSha256Sum property.';"^
+       "  exit 1;"^
+       "}"^
+       "}"
+    if ERRORLEVEL 1 goto error
+)
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

task07/pom.xml

@@ -0,0 +1,101 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.2.5</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>de.hftstuttgart.vs</groupId>
+    <artifactId>task07</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>task07</name>
+    <description>GraphQL Client task</description>
+    <properties>
+        <java.version>17</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-webflux</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-graphql</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.graphql</groupId>
+            <artifactId>spring-graphql-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>io.github.deweyjose</groupId>
+                <artifactId>graphqlcodegen-maven-plugin</artifactId>
+                <version>1.60.1</version>
+                <executions>
+                    <execution>
+                        <id>dgs-codegen</id>
+                        <goals>
+                            <goal>generate</goal>
+                        </goals>
+                        <configuration>
+                            <schemaPaths>
+                                <param>src/main/resources/graphql-client</param>
+                            </schemaPaths>
+                            <packageName>de.hftstuttgart.vs.task07.integration.graphql</packageName>
+                            <addGeneratedAnnotation>true</addGeneratedAnnotation>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.codehaus.mojo</groupId>
+                <artifactId>build-helper-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>add-dgs-source</id>
+                        <phase>generate-sources</phase>
+                        <goals>
+                            <goal>add-source</goal>
+                        </goals>
+                        <configuration>
+                            <sources>
+                                <source>${project.build.directory}/generated-sources</source>
+                            </sources>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

task07/src/main/java/de/hftstuttgart/vs/task07/Task07Application.java

@@ -0,0 +1,13 @@
+package de.hftstuttgart.vs.task07;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Task07Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Task07Application.class, args);
+	}
+
+}

task07/src/main/java/de/hftstuttgart/vs/task07/integration/graphql/CountryClient.java

@@ -0,0 +1,54 @@
+package de.hftstuttgart.vs.task07.integration.graphql;
+
+import java.util.List;
+
+import org.springframework.graphql.client.GraphQlClient;
+import org.springframework.graphql.client.HttpGraphQlClient;
+import org.springframework.stereotype.Service;
+import org.springframework.web.reactive.function.client.WebClient;
+
+import de.hftstuttgart.vs.task07.integration.graphql.types.Continent;
+import de.hftstuttgart.vs.task07.integration.graphql.types.Country;
+import reactor.core.publisher.Mono;
+
+@Service
+public class CountryClient {
+
+    /*
+      TODO:
+      1. Add query document names
+      2. Assign variables as needed in the query document
+    */
+
+    private final GraphQlClient graphQlClient;
+
+    public CountryClient() {
+        final WebClient webClient = WebClient.create("https://countries.trevorblades.com/graphql");
+        graphQlClient = HttpGraphQlClient.builder(webClient).build();
+    }
+
+    public Mono<Country> getCountryByCountryCode(final String countryCode, final String lang) {
+        return graphQlClient.documentName("TODO").variable("TODO", "TODO").retrieve("country").toEntity(Country.class);
+    }
+
+    public Mono<List<Country>> getCountriesByCurrency(final String currency) {
+        return graphQlClient
+                .documentName("TODO")
+                .variable("TODO", "TODO")
+                .retrieve("countries")
+                .toEntityList(Country.class);
+    }
+
+    public Mono<List<Continent>> getAllContinents() {
+        return graphQlClient.documentName("TODO").retrieve("continents").toEntityList(Continent.class);
+    }
+
+    public Mono<Continent> getContinentByCodeWithCountries(final String code) {
+        return graphQlClient
+                .documentName("TODO")
+                .variable("TODO", "TODO")
+                .retrieve("continent")
+                .toEntity(Continent.class);
+    }
+
+}

task07/src/main/java/de/hftstuttgart/vs/task07/service/ContinentService.java

@@ -0,0 +1,29 @@
+package de.hftstuttgart.vs.task07.service;
+
+import java.util.List;
+
+import org.springframework.stereotype.Service;
+
+import de.hftstuttgart.vs.task07.integration.graphql.CountryClient;
+import de.hftstuttgart.vs.task07.integration.graphql.types.Continent;
+
+@Service
+public class ContinentService implements IContinentService {
+
+    private final CountryClient countryClient;
+
+    public ContinentService(final CountryClient countryClient) {
+        this.countryClient = countryClient;
+    }
+
+    @Override
+    public List<Continent> getAllContinents() {
+        return countryClient.getAllContinents().block();
+    }
+
+    @Override
+    public Continent getContinentByCodeWithCountries(final String code) {
+        return countryClient.getContinentByCodeWithCountries(code).block();
+    }
+
+}

task07/src/main/java/de/hftstuttgart/vs/task07/service/CountryService.java

@@ -0,0 +1,29 @@
+package de.hftstuttgart.vs.task07.service;
+
+import java.util.List;
+
+import org.springframework.stereotype.Service;
+
+import de.hftstuttgart.vs.task07.integration.graphql.CountryClient;
+import de.hftstuttgart.vs.task07.integration.graphql.types.Country;
+
+@Service
+public class CountryService implements ICountryService {
+
+    private final CountryClient countryClient;
+
+    public CountryService(final CountryClient countryClient) {
+        this.countryClient = countryClient;
+    }
+
+    @Override
+    public Country getCountryByCode(final String countryCode, final String lang) {
+        return countryClient.getCountryByCountryCode(countryCode, lang).block();
+    }
+
+    @Override
+    public List<Country> getCountriesByCurrency(final String currency) {
+        return countryClient.getCountriesByCurrency(currency).block();
+    }
+
+}

task07/src/main/java/de/hftstuttgart/vs/task07/service/IContinentService.java

@@ -0,0 +1,13 @@
+package de.hftstuttgart.vs.task07.service;
+
+import java.util.List;
+
+import de.hftstuttgart.vs.task07.integration.graphql.types.Continent;
+
+public interface IContinentService {
+
+    List<Continent> getAllContinents();
+
+    Continent getContinentByCodeWithCountries(String code);
+
+}

task07/src/main/java/de/hftstuttgart/vs/task07/service/ICountryService.java

@@ -0,0 +1,14 @@
+package de.hftstuttgart.vs.task07.service;
+
+import java.util.List;
+
+import de.hftstuttgart.vs.task07.integration.graphql.types.Country;
+import jakarta.annotation.Nullable;
+
+public interface ICountryService {
+
+    Country getCountryByCode(String countryCode, @Nullable String lang);
+
+    List<Country> getCountriesByCurrency(String currency);
+
+}

task07/src/main/java/de/hftstuttgart/vs/task07/view/ContinentController.java

@@ -0,0 +1,37 @@
+package de.hftstuttgart.vs.task07.view;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+
+import de.hftstuttgart.vs.task07.service.IContinentService;
+
+@Controller
+public class ContinentController {
+
+    private final IContinentService continentService;
+
+    public ContinentController(final IContinentService continentService) {
+        this.continentService = continentService;
+    }
+
+    @GetMapping("/")
+    public String index() {
+        return "redirect:/continents";
+    }
+
+    @GetMapping("/continents")
+    public String continents(final Model model) {
+        model.addAttribute("continents", continentService.getAllContinents());
+        return "continents";
+    }
+
+    @GetMapping("/continents/{continentCode}")
+    public String continentByCode(@PathVariable final String continentCode, final Model model) {
+        model.addAttribute("continent", continentService.getContinentByCodeWithCountries(continentCode));
+        return "continent";
+    }
+
+}
+

task07/src/main/java/de/hftstuttgart/vs/task07/view/CountryController.java

@@ -0,0 +1,37 @@
+package de.hftstuttgart.vs.task07.view;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestParam;
+
+import de.hftstuttgart.vs.task07.service.ICountryService;
+import jakarta.annotation.Nullable;
+
+@Controller
+public class CountryController {
+
+    private final ICountryService countryService;
+
+    public CountryController(final ICountryService countryService) {
+        this.countryService = countryService;
+    }
+
+    @GetMapping("/countries/{countryCode}")
+    public String continentByCode(@PathVariable final String countryCode, @RequestParam @Nullable final String lang,
+            final Model model) {
+        model.addAttribute("country", countryService.getCountryByCode(countryCode, lang));
+        model.addAttribute("lang", lang);
+        return "country";
+    }
+
+    @GetMapping("/currencies/{currency}")
+    public String countriesByCurrency(@PathVariable final String currency, final Model model) {
+        model.addAttribute("currency", currency);
+        model.addAttribute("countries", countryService.getCountriesByCurrency(currency));
+        return "currency";
+    }
+
+}
+

task07/src/main/resources/application.properties

@@ -0,0 +1 @@
+spring.application.name=task07

task07/src/main/resources/graphql-client/schema.graphqls

@@ -0,0 +1,78 @@
+schema {
+    query: Query
+}
+
+type Continent {
+    code: ID!
+    countries: [Country!]!
+    name: String!
+}
+
+type Country {
+    awsRegion: String!
+    capital: String
+    code: ID!
+    continent: Continent!
+    currencies: [String!]!
+    currency: String
+    emoji: String!
+    emojiU: String!
+    languages: [Language!]!
+    name(lang: String): String!
+    native: String!
+    phone: String!
+    phones: [String!]!
+    states: [State!]!
+    subdivisions: [Subdivision!]!
+}
+
+type Language {
+    code: ID!
+    name: String!
+    native: String!
+    rtl: Boolean!
+}
+
+type Query {
+    continent(code: ID!): Continent
+    continents(filter: ContinentFilterInput = {}): [Continent!]!
+    countries(filter: CountryFilterInput = {}): [Country!]!
+    country(code: ID!): Country
+    language(code: ID!): Language
+    languages(filter: LanguageFilterInput = {}): [Language!]!
+}
+
+type State {
+    code: String
+    country: Country!
+    name: String!
+}
+
+type Subdivision {
+    code: ID!
+    emoji: String
+    name: String!
+}
+
+input ContinentFilterInput {
+    code: StringQueryOperatorInput
+}
+
+input CountryFilterInput {
+    code: StringQueryOperatorInput
+    continent: StringQueryOperatorInput
+    currency: StringQueryOperatorInput
+    name: StringQueryOperatorInput
+}
+
+input LanguageFilterInput {
+    code: StringQueryOperatorInput
+}
+
+input StringQueryOperatorInput {
+    eq: String
+    in: [String!]
+    ne: String
+    nin: [String!]
+    regex: String
+}

task07/src/main/resources/graphql-documents/getAllContinents.graphql

@@ -0,0 +1 @@
+# TODO add query

task07/src/main/resources/graphql-documents/getAllCountriesWithCurrency.graphql

@@ -0,0 +1 @@
+# TODO add query

task07/src/main/resources/graphql-documents/getContinentWithCountries.graphql

@@ -0,0 +1 @@
+# TODO add query

task07/src/main/resources/graphql-documents/getCountry.graphql

@@ -0,0 +1 @@
+# TODO add query

task07/src/main/resources/graphql-documents/graphql.config.yml

@@ -0,0 +1,6 @@
+schema: schema.graphqls
+documents: '**/*.graphql'
+extensions:
+  endpoints:
+    trevorblades:
+      url: 'https://countries.trevorblades.com/graphql'

task07/src/main/resources/graphql-documents/schema.graphqls

@@ -0,0 +1,78 @@
+schema {
+    query: Query
+}
+
+type Continent {
+    code: ID!
+    countries: [Country!]!
+    name: String!
+}
+
+type Country {
+    awsRegion: String!
+    capital: String
+    code: ID!
+    continent: Continent!
+    currencies: [String!]!
+    currency: String
+    emoji: String!
+    emojiU: String!
+    languages: [Language!]!
+    name(lang: String): String!
+    native: String!
+    phone: String!
+    phones: [String!]!
+    states: [State!]!
+    subdivisions: [Subdivision!]!
+}
+
+type Language {
+    code: ID!
+    name: String!
+    native: String!
+    rtl: Boolean!
+}
+
+type Query {
+    continent(code: ID!): Continent
+    continents(filter: ContinentFilterInput = {}): [Continent!]!
+    countries(filter: CountryFilterInput = {}): [Country!]!
+    country(code: ID!): Country
+    language(code: ID!): Language
+    languages(filter: LanguageFilterInput = {}): [Language!]!
+}
+
+type State {
+    code: String
+    country: Country!
+    name: String!
+}
+
+type Subdivision {
+    code: ID!
+    emoji: String
+    name: String!
+}
+
+input ContinentFilterInput {
+    code: StringQueryOperatorInput
+}
+
+input CountryFilterInput {
+    code: StringQueryOperatorInput
+    continent: StringQueryOperatorInput
+    currency: StringQueryOperatorInput
+    name: StringQueryOperatorInput
+}
+
+input LanguageFilterInput {
+    code: StringQueryOperatorInput
+}
+
+input StringQueryOperatorInput {
+    eq: String
+    in: [String!]
+    ne: String
+    nin: [String!]
+    regex: String
+}

task07/src/main/resources/templates/continent.html

@@ -0,0 +1,17 @@
+<!DOCTYPE HTML>
+<html lang="en">
+<head>
+    <title th:text="${continent.name}+' - World Information System'">Continent - World Information System</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+</head>
+<body>
+<h1 th:text="${continent.name}"></h1>
+<div>
+    <ul>
+        <li th:each="country : ${continent.countries}">
+            <a th:href="@{/countries/{countryCode}(countryCode=${country.code})}" th:text="*{country.name}"></a>
+        </li>
+    </ul>
+</div>
+</body>
+</html>

task07/src/main/resources/templates/continents.html

@@ -0,0 +1,17 @@
+<!DOCTYPE HTML>
+<html lang="en">
+<head>
+    <title>All Continents - World Information System</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+</head>
+<body>
+<h1>All continents</h1>
+<div>
+    <ul>
+        <li th:each="continent : ${continents}">
+            <a th:href="@{/continents/{continentCode}(continentCode=${continent.code})}" th:text="*{continent.name}"></a>
+        </li>
+    </ul>
+</div>
+</body>
+</html>

task07/src/main/resources/templates/country.html

@@ -0,0 +1,51 @@
+<!DOCTYPE HTML>
+<html lang="en">
+<head>
+    <title th:text="${country.name}+' - World Information System'">Country - World Information System</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+</head>
+<body>
+<div style="display: flex; align-items: start; justify-content: space-between;">
+    <div>
+        <h1 th:text="${country.name}"></h1>
+    </div>
+    <!-- From https://github.com/trevorblades/countries/blob/main/src/locales.ts -->
+    <div th:with="langs = ${ {'en', 'de', 'es', 'fa', 'fr', 'it', 'ja', 'nl', 'pl', 'pt', 'ru', 'tr', 'vi', 'zh'} }">
+        <label for="lang-select">Select language</label>
+        <select id="lang-select" onchange="changeLang(this)">
+            <option th:each="language : ${langs}" th:text="${language}" th:selected="${lang == language}">lang</option>
+        </select>
+    </div>
+</div>
+<h2 th:text="'Capital: ' + ${country.capital}"></h2>
+<h2>Languages</h2>
+<div>
+    <ul>
+        <li th:each="language : ${country.languages}" th:text="${language.name}"></li>
+    </ul>
+</div>
+<h2>Currencies</h2>
+<div>
+    <ul>
+        <li th:each="currency : ${country.currencies}">
+            <a th:href="@{/currencies/{currency}(currency=${currency})}" th:text="${currency}"></a>
+        </li>
+    </ul>
+</div>
+<h2>Phone Prefix</h2>
+<div>
+    <ul>
+        <li th:each="phone : ${country.phones}" th:text="'+' + ${phone}"></li>
+    </ul>
+</div>
+<h2>Flag</h2>
+<span style="font-size: xxx-large" th:text="${country.emoji}"></span>
+</body>
+</html>
+
+<script>
+    function changeLang(option) {
+        const lang = option.options[option.selectedIndex].value;
+        window.location.href = `?lang=${lang}`
+    }
+</script>

task07/src/main/resources/templates/currency.html

@@ -0,0 +1,17 @@
+<!DOCTYPE HTML>
+<html lang="en">
+<head>
+    <title th:text="'Countries paying in ' + ${currency} + ' - World Information System'">Countries paying in - World Information System</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
+</head>
+<body>
+<h1 th:text="'Countries paying in ' + ${currency}">Currency:</h1>
+<div>
+    <ul>
+        <li th:each="country : ${countries}">
+            <a th:href="@{/countries/{countryCode}(countryCode=${country.code})}" th:text="*{country.name}"></a>
+        </li>
+    </ul>
+</div>
+</body>
+</html>