Merge pull request #138 from Mufa0/immutables-library

Immutables library

build-all.sh

@@ -86,6 +86,7 @@ if [[ "$MODULE" == "module6" ]]
 then
   # ADD NEW MODULES HERE
   # (add new modules above the rest so you get quicker feedback if it fails)
+  build_maven_module "immutables"
   build maven_module "core-java/collectionops"
   build maven_module "spring-boot/resttemplate"
   build_maven_module "spring-cloud/tracing"

immutables/.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/

immutables/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed 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.
+ */
+
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+            + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if (mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if (mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if (!outputFile.getParentFile().exists()) {
+            if (!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

immutables/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.3/apache-maven-3.8.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

immutables/mvnw

@@ -0,0 +1,310 @@
+#!/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.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   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 "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$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
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  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"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$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 $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$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="`which 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
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# 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/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$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 $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

immutables/mvnw.cmd

@@ -0,0 +1,182 @@
+@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 Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@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 "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\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 DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_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 DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_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('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@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 "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\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%
+
+exit /B %ERROR_CODE%

immutables/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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.reflectoring.io</groupId>
+    <artifactId>immutables</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>immutables</name>
+    <description>immutables</description>
+    <properties>
+        <java.version>11</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.immutables</groupId>
+            <artifactId>value</artifactId>
+            <version>2.8.8</version>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>11</source>
+                    <target>11</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

immutables/src/main/java/com/reflectoring/io/immutables/Role.java

@@ -0,0 +1,13 @@
+package com.reflectoring.io.immutables;
+
+public enum Role {
+    WRITER("writer"),
+    READER("reader");
+
+    public final String value;
+
+    Role(String value){
+        this.value = value;
+    }
+
+}

immutables/src/main/java/com/reflectoring/io/immutables/basic/Article.java

@@ -0,0 +1,17 @@
+package com.reflectoring.io.immutables.basic;
+
+
+import org.immutables.value.Value;
+
+
+@Value.Immutable
+public abstract class Article {
+
+    abstract long getId();
+
+    abstract String getTitle();
+
+    abstract String getContent();
+
+    abstract long getUserId();
+}

immutables/src/main/java/com/reflectoring/io/immutables/basic/ArticleService.java

@@ -0,0 +1,27 @@
+package com.reflectoring.io.immutables.basic;
+
+import java.util.List;
+
+public class ArticleService {
+
+    // Explain how to create Immutable object the simplest way possible.
+    // Show generated class and class that we created
+    public static void main(String[] args) {
+        Article article = ImmutableArticle.builder()
+                .id(0)
+                .content("Lorem ipsum dolor sit amet.")
+                .title("Lorem ipsum article!")
+                .userId(1l)
+                .build();
+
+        User user = ImmutableUser.builder()
+                .id(1l)
+                .name("Mateo")
+                .lastname("Stjepanovic")
+                .email("mateo@mock.com")
+                .password("password")
+                .articles(List.of(article))
+                .build();
+        System.out.println(user);
+    }
+}

immutables/src/main/java/com/reflectoring/io/immutables/basic/User.java

@@ -0,0 +1,23 @@
+package com.reflectoring.io.immutables.basic;
+
+
+import org.immutables.value.Value;
+
+import java.util.List;
+
+
+@Value.Immutable
+public abstract class User {
+
+    public abstract long getId();
+
+    public abstract String getName();
+
+    public abstract String getLastname();
+
+    public abstract String getEmail();
+
+    public abstract  String getPassword();
+
+    public abstract List<Article> getArticles();
+}

immutables/src/main/java/com/reflectoring/io/immutables/builders/BuildersService.java

@@ -0,0 +1,33 @@
+package com.reflectoring.io.immutables.builders;
+
+public class BuildersService {
+
+    public static void main(String[] args) {
+//        StrictBuilderArticle strictBuilderArticle =
+//                createStrictArticle();
+        StagedBuilderArticle stagedBuilderArticle = createStagedArticle();
+    }
+
+    // Show how strict builder works
+    // Show error that is provided
+    public static StrictBuilderArticle createStrictArticle(){
+        return ImmutableStrictBuilderArticle.builder()
+                .id(0)
+                .id(1)
+                .build();
+    }
+
+    // Staged article is strict implicitly
+    // Staged article does now allow calling build method if not all mandatory fields are set
+    // Downside of using staged builders
+
+    public static StagedBuilderArticle createStagedArticle(){
+        return ImmutableStagedBuilderArticle.builder()
+                .id(0)
+                .title("Lorem ipsum article!")
+                .content("Lore ipsum...")
+                .build();
+    }
+
+
+}

immutables/src/main/java/com/reflectoring/io/immutables/builders/StagedBuilderArticle.java

@@ -0,0 +1,14 @@
+package com.reflectoring.io.immutables.builders;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+@Value.Style(stagedBuilder = true)
+abstract class StagedBuilderArticle {
+
+    abstract long getId();
+
+    abstract String getTitle();
+
+    abstract String getContent();
+}

immutables/src/main/java/com/reflectoring/io/immutables/builders/StrictBuilderArticle.java

@@ -0,0 +1,13 @@
+package com.reflectoring.io.immutables.builders;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+@Value.Style(strictBuilder = true)
+abstract class StrictBuilderArticle {
+    abstract long getId();
+
+    abstract String getTitle();
+
+    abstract String getContent();
+}

immutables/src/main/java/com/reflectoring/io/immutables/collections/CollectionsService.java

@@ -0,0 +1,46 @@
+package com.reflectoring.io.immutables.collections;
+
+import com.reflectoring.io.immutables.basic.Article;
+import com.reflectoring.io.immutables.basic.ImmutableArticle;
+import com.reflectoring.io.immutables.basic.ImmutableUser;
+import com.reflectoring.io.immutables.basic.User;
+
+public class CollectionsService {
+
+    public static void main(String[] args) {
+
+        Article article1 = ImmutableArticle.builder()
+                .id(0l)
+                .title("Lorem ipsum!")
+                .content("Lorem ipsum")
+                .userId(1l)
+                .build();
+
+        Article article2 = ImmutableArticle.builder()
+                .id(2l)
+                .title("Lorem ipsum!")
+                .content("Lorem ipsum")
+                .userId(1l)
+                .build();
+
+        Article article3 = ImmutableArticle.builder()
+                .id(3l)
+                .title("Lorem ipsum!")
+                .content("Lorem ipsum")
+                .userId(1l)
+                .build();
+        User user = ImmutableUser.builder()
+                .id(1l)
+                .name("Mateo")
+                .lastname("Stjepanovic")
+                .email("mock@mock.com")
+                .password("mock")
+                .addArticles(article1)
+                .addArticles(article2)
+                .build();
+        System.out.println(user);
+
+        user.getArticles().add(article3);
+
+    }
+}

immutables/src/main/java/com/reflectoring/io/immutables/constructor/ConstructorArticle.java

@@ -0,0 +1,13 @@
+package com.reflectoring.io.immutables.constructor;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+public abstract class ConstructorArticle {
+    @Value.Parameter
+    public abstract long getId();
+    @Value.Parameter
+    public abstract String getTitle();
+    @Value.Parameter
+    public abstract String getContent();
+}

immutables/src/main/java/com/reflectoring/io/immutables/constructor/ConstructorsService.java

@@ -0,0 +1,17 @@
+package com.reflectoring.io.immutables.constructor;
+
+public class ConstructorsService {
+    public static void main(String[] args) {
+
+    }
+
+    // Out of the box constructor
+    public static ConstructorArticle createConstructorArticle(){
+        return ImmutableConstructorArticle.of(0,"Lorem ipsum article!", "Lorem ipsum...");
+    }
+
+    // How to use standard new constructor
+    public static PlainPublicConstructorArticle createPlainPublicConstructorArticle(){
+        return new ImmutablePlainPublicConstructorArticle(0,"Lorem ipsum","Lorem ipsum...");
+    }
+}

immutables/src/main/java/com/reflectoring/io/immutables/constructor/PlainPublicConstructorArticle.java

@@ -0,0 +1,14 @@
+package com.reflectoring.io.immutables.constructor;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+@Value.Style(of = "new")
+public abstract class PlainPublicConstructorArticle {
+    @Value.Parameter
+    public abstract long getId();
+    @Value.Parameter
+    public abstract String getTitle();
+    @Value.Parameter
+    public abstract String getContent();
+}

immutables/src/main/java/com/reflectoring/io/immutables/derivedAndLazy/DerivedAndLazyService.java

@@ -0,0 +1,16 @@
+package com.reflectoring.io.immutables.derivedAndLazy;
+
+public class DerivedAndLazyService {
+
+    public static void main(String[] args) {
+        DerivedArticle article = ImmutableDerivedArticle.builder()
+                .id(1l)
+                .title("Lorem ipsum")
+                .content("Lorem ipsum dolor sit amet, consectetur " +
+                        "adipiscing elit. Donec ut sem lectus. " +
+                        "Nulla dapibus eros.")
+                .build();
+
+        System.out.println(article);
+    }
+}

immutables/src/main/java/com/reflectoring/io/immutables/derivedAndLazy/DerivedArticle.java

@@ -0,0 +1,22 @@
+package com.reflectoring.io.immutables.derivedAndLazy;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+abstract class DerivedArticle {
+
+    abstract Long getId();
+
+    abstract String getTitle();
+
+    abstract String getContent();
+
+    @Value.Derived
+    String getSummary(){
+        String summary = getContent().substring(0,
+                getContent().length()>50 ? 50 :
+                        getContent().length());
+        return summary.length() == getContent().length() ? summary
+                : summary+"...";
+    }
+}

immutables/src/main/java/com/reflectoring/io/immutables/derivedAndLazy/LazyArticle.java

@@ -0,0 +1,23 @@
+package com.reflectoring.io.immutables.derivedAndLazy;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+abstract class LazyArticle {
+
+    abstract Long getId();
+    
+    abstract String getTitle();
+
+    abstract String getContent();
+
+    @Value.Lazy
+    String summary(){
+        String summary = getContent().substring(0,
+                getContent().length()>50 ? 50 :
+                        getContent().length());
+        return summary.length() == getContent().length() ? summary
+                : summary+"...";
+    }
+
+}

immutables/src/main/java/com/reflectoring/io/immutables/optionalAndDefault/DefaultArticle.java

@@ -0,0 +1,17 @@
+package com.reflectoring.io.immutables.optionalAndDefault;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+abstract class DefaultArticle {
+
+    abstract Long getId();
+
+    @Value.Default
+    String getTitle(){
+        return "Default title!";
+    }
+
+    abstract String getContent();
+
+}

immutables/src/main/java/com/reflectoring/io/immutables/optionalAndDefault/DefaultArticleInterface.java

@@ -0,0 +1,17 @@
+package com.reflectoring.io.immutables.optionalAndDefault;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+interface DefaultArticleInterface {
+
+    Long getId();
+
+    @Value.Default
+    default String getTitle(){
+        return "Default title!";
+    }
+
+    String getContent();
+
+}

immutables/src/main/java/com/reflectoring/io/immutables/optionalAndDefault/OptionalAndDefaultService.java

@@ -0,0 +1,23 @@
+package com.reflectoring.io.immutables.optionalAndDefault;
+
+public class OptionalAndDefaultService {
+
+    //Explain optional and how we can omit values
+    //Explain default and how we use it
+    public static void main(String[] args) {
+        OptionalArticle article =  ImmutableOptionalArticle.builder().build();
+        DefaultArticle defaultArticle = ImmutableDefaultArticle.builder()
+                .id(0l)
+                .content("Lorem ipsum!")
+                .build();
+
+        DefaultArticleInterface defaultArticleInterface =
+                ImmutableDefaultArticleInterface.builder()
+                        .id(0l)
+                        .content("Lorem ipsum!")
+                        .build();
+
+        System.out.println(defaultArticle);
+        System.out.println(defaultArticleInterface);
+    }
+}

immutables/src/main/java/com/reflectoring/io/immutables/optionalAndDefault/OptionalArticle.java

@@ -0,0 +1,15 @@
+package com.reflectoring.io.immutables.optionalAndDefault;
+
+import org.immutables.value.Value;
+
+import java.util.Optional;
+
+@Value.Immutable
+abstract class OptionalArticle {
+
+    abstract Optional<Long> getId();
+
+    abstract Optional<String> getTitle();
+
+    abstract Optional<String> getContent();
+}

immutables/src/main/java/com/reflectoring/io/immutables/styles/CustomStyle.java

@@ -0,0 +1,23 @@
+package com.reflectoring.io.immutables.styles;
+
+import org.immutables.value.Value;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+// How does styles work
+// Where we can put it
+// Thing to be aware of and tests of those
+
+@Target({ElementType.PACKAGE,ElementType.TYPE})
+@Retention(RetentionPolicy.CLASS)
+@Value.Style(
+        of = "new",
+        strictBuilder = true,
+        allParameters = true,
+        visibility = Value.Style.ImplementationVisibility.PUBLIC
+
+)
+public @interface CustomStyle {}

immutables/src/main/java/com/reflectoring/io/immutables/styles/StylesArticle.java

@@ -0,0 +1,13 @@
+package com.reflectoring.io.immutables.styles;
+
+import org.immutables.value.Value;
+
+@Value.Immutable
+@CustomStyle
+abstract class StylesArticle {
+    abstract long getId();
+
+    abstract String getTitle();
+
+    abstract String getContent();
+}

immutables/src/main/java/com/reflectoring/io/immutables/withoutImmutables/ArticleWithoutImmutable.java

@@ -0,0 +1,92 @@
+package com.reflectoring.io.immutables.withoutImmutables;
+
+import java.util.Objects;
+
+public class ArticleWithoutImmutable {
+
+    private final long id;
+
+    private final String title;
+
+    private final String content;
+
+    private final long userId;
+
+    private ArticleWithoutImmutable(long id, String title,
+                                    String content, long userId) {
+        this.id = id;
+        this.title = title;
+        this.content = content;
+        this.userId = userId;
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public long getUserId() {
+        return userId;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        ArticleWithoutImmutable that = (ArticleWithoutImmutable) o;
+        return id == that.id && Objects.equals(title, that.title) &&
+                Objects.equals(content, that.content);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, title, content);
+    }
+
+    public static ArticleWithoutImmutableBuilder builder() {
+        return new ArticleWithoutImmutableBuilder();
+    }
+
+    public static class ArticleWithoutImmutableBuilder {
+        private long id;
+
+        private String title;
+
+        private String content;
+
+        private long userId;
+
+        public ArticleWithoutImmutableBuilder id(long id) {
+            this.id = id;
+            return this;
+        }
+
+        public ArticleWithoutImmutableBuilder title(String title) {
+            this.title = title;
+            return this;
+        }
+
+        public ArticleWithoutImmutableBuilder content(
+                String content) {
+            this.content = content;
+            return this;
+        }
+
+        public ArticleWithoutImmutableBuilder userId(Long userId) {
+            this.userId = userId;
+            return this;
+        }
+
+        public ArticleWithoutImmutable build() {
+            return new ArticleWithoutImmutable(id, title, content,
+                    userId);
+        }
+    }
+}

immutables/src/main/java/com/reflectoring/io/immutables/withoutImmutables/UserWithoutImmutable.java

@@ -0,0 +1,166 @@
+package com.reflectoring.io.immutables.withoutImmutables;
+
+
+import com.reflectoring.io.immutables.Role;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+public class UserWithoutImmutable {
+
+    private final long id;
+
+    private final String name;
+
+    private final String lastname;
+
+    private final String email;
+
+    private final String password;
+
+    private final Role role;
+
+    private List<ArticleWithoutImmutable> articles;
+
+    private UserWithoutImmutable(long id, String name,
+                                 String lastname, String email,
+                                 String password, Role role,
+                                 List<ArticleWithoutImmutable> articles) {
+        this.id = id;
+        this.name = name;
+        this.lastname = lastname;
+        this.email = email;
+        this.password = password;
+        this.role = role;
+        this.articles = new ArrayList<>(articles);
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getLastname() {
+        return lastname;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public Role getRole() {
+        return role;
+    }
+
+    public List<ArticleWithoutImmutable> getArticles() {
+        return articles;
+    }
+
+    public UserWithoutImmutable addArticle(
+            ArticleWithoutImmutable article) {
+        this.articles.add(article);
+        return this;
+    }
+
+    public UserWithoutImmutable addArticles(
+            List<ArticleWithoutImmutable> articles) {
+        this.articles.addAll(articles);
+        return this;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        UserWithoutImmutable that = (UserWithoutImmutable) o;
+        return id == that.id && email.equals(that.email) &&
+                password.equals(that.password);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, email, password);
+    }
+
+    @Override
+    public String toString() {
+        return "UserWithoutImmutable{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", lastname='" + lastname + '\'' +
+                ", role= '" + role + '\'' +
+                ", email='" + email + '\'' +
+                ", password= *****'" +
+                ", articles=" + articles +
+                '}';
+    }
+
+    public static UserWithoutImmutableBuilder builder() {
+        return new UserWithoutImmutableBuilder();
+    }
+
+    public static class UserWithoutImmutableBuilder {
+        private long id;
+
+        private String name;
+
+        private String lastname;
+
+        private Role role;
+
+        private String email;
+
+        private String password;
+
+        private List<ArticleWithoutImmutable> articles;
+
+        public UserWithoutImmutableBuilder id(long id) {
+            this.id = id;
+            return this;
+        }
+
+        public UserWithoutImmutableBuilder name(String name) {
+            this.name = name;
+            return this;
+        }
+
+        public UserWithoutImmutableBuilder lastname(String lastname) {
+            this.lastname = lastname;
+            return this;
+        }
+
+        public UserWithoutImmutableBuilder role(Role role) {
+            this.role = role;
+            return this;
+        }
+
+        public UserWithoutImmutableBuilder email(String email) {
+            this.email = email;
+            return this;
+        }
+
+        public UserWithoutImmutableBuilder password(String password) {
+            this.password = password;
+            return this;
+        }
+
+        public UserWithoutImmutableBuilder articles(
+                List<ArticleWithoutImmutable> articles) {
+            this.articles = articles;
+            return this;
+        }
+
+        public UserWithoutImmutable build() {
+            return new UserWithoutImmutable(id, name, lastname, email,
+                    password, role, articles);
+        }
+    }
+}