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-rw-r--r--.github/workflows/publish-jar.yml38
-rw-r--r--.gitignore4
-rw-r--r--LICENSE21
-rw-r--r--README.md67
-rw-r--r--build.gradle.kts28
-rw-r--r--gradle.properties1
-rw-r--r--gradlew172
-rw-r--r--gradlew.bat84
-rw-r--r--settings.gradle2
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/Config.kt55
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/ConfigMissingException.kt5
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/ConfigMissingProviderException.kt4
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/ConfigProvider.kt6
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/ConfigVariable.kt6
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/FilePropertiesProvider.kt45
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/TransformerConfigVariable.kt41
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/variables/IntegerVariable.kt15
-rw-r--r--src/main/kotlin/com/romangraef/jrconfig/variables/StringVariable.kt15
-rw-r--r--src/test/java/com/romangraef/jrconfig/Main.java11
-rw-r--r--src/test/kotlin/com/romangraef/jrconfig/MainKt.kt8
20 files changed, 628 insertions, 0 deletions
diff --git a/.github/workflows/publish-jar.yml b/.github/workflows/publish-jar.yml
new file mode 100644
index 0000000..b42e61f
--- /dev/null
+++ b/.github/workflows/publish-jar.yml
@@ -0,0 +1,38 @@
+on:
+ push:
+ # Sequence of patterns matched against refs/tags
+ tags:
+ - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
+
+name: Upload Release Asset
+
+jobs:
+ build:
+ name: Upload Release Asset
+ runs-on: ubuntu-latest
+ steps:
+ - name: Checkout code
+ uses: actions/checkout@master
+ - name: Build project # This would actually build your project, using zip for an example artifact
+ run: |
+ ./gradlew build
+ - name: Create Release
+ id: create_release
+ uses: actions/create-release@v1.0.0
+ env:
+ GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+ with:
+ tag_name: ${{ github.ref }}
+ release_name: Release ${{ github.ref }}
+ draft: false
+ prerelease: false
+ - name: Upload Release Asset
+ id: upload-release-asset
+ uses: actions/upload-release-asset@v1.0.1
+ env:
+ GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+ with:
+ upload_url: ${{ steps.create_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps
+ asset_path: ./build/libs/jrconfig-shadow.jar
+ asset_name: jrconfig-shadow.zip
+ asset_content_type: application/zip \ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1675d97
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.idea/
+.gradle/
+build/
+config.properties
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..221e117
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Roman Konrad Gräf
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE. \ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..df213cb
--- /dev/null
+++ b/README.md
@@ -0,0 +1,67 @@
+## romangraefs Java Config library.
+I intend to mostly use this library for personal projects, so documentation might be lacking in parts. If you have questions, feel free to hit me up on [Twitter](https://twitter.com/romangraef89). That being said:
+
+## Usage
+Java:
+```java
+public class ConfigurableClass1 {
+ public ConfigVariable<String> someConfigProp = Config.getString("someProp"); // Define a config property
+
+ public ConfigurableClass1() {
+ Config.use(FilePropertiesProvider.create("config.properties")); // Define a config source.
+ }
+
+ public void someMethod() {
+ System.out.println(someConfigProp.get()); // Load data from the config.
+ someConfigProp.set("New value");
+ }
+}
+```
+
+Kotlin:
+```kotlin
+val someConfigProp = Config.get<String>("someProp")
+
+fun main() {
+ Config.use(FilePropertiesProvider.create("config.properties"))
+ println(someConfigProp.get())
+}
+```
+
+### Api breakdown
+
+The API is split up into 3 parts:
+
+ - Config variables.
+
+These are what you interact with, for most of your code. You obtain an instance by either calling
+`Config.get(someClazz, "propName")` or you can use `Config.get<SomeClass>("propName")` in Kotlin.
+Some Common Types like `String` have shortcut methods like `Config.getString("propName")`.
+
+ - Variable Transformers.
+
+These parse / serialize a string value obtained from a config source. There are some default implementations
+for some types (`String` and `Integer` as of right now), but you can manually create transformers
+by extending `TransformerConfigVariable<T>`.
+
+ - Config providers.
+
+You usually install one config provider at the very start of your main using `Config.use(provider)`. Currently there
+is only one Provider, which is the `FilePropertiesProvider` which directly utilizes standard java properties. If
+you want to create your own provider, you can implement `ConfigProvider`
+
+## Installation
+
+Gradle via [Jitpack](https://jitpack.io/):
+```groovy
+repositories {
+ maven { url "https://jitpack.io" }
+}
+
+dependencies {
+ implementation("com.github.romangraef", "jrconfig", "v1.0")
+}
+```
+The version can be either a git shortref, or a [tag](https://github.com/romangraef/jrconfig/tags).
+
+Alternatively, a uberjar/fatjar/ shadow/shadedjar can be obtained from the [releases](https://github.com/romangraef/jrconfig/releases). \ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..fc35fe1
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,28 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+plugins {
+ java
+ kotlin("jvm") version "1.3.72"
+ id("com.github.johnrengelman.shadow") version "4.0.4"
+}
+
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ implementation(kotlin("stdlib-jdk8"))
+ testCompile("junit", "junit", "4.12")
+}
+tasks {
+ named<ShadowJar>("shadowJar") {
+ archiveBaseName.set("jrconfig-shadow")
+ mergeServiceFiles()
+ }
+}
+
+tasks {
+ build {
+ dependsOn(shadowJar)
+ }
+} \ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..29e08e8
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1 @@
+kotlin.code.style=official \ No newline at end of file
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..af6708f
--- /dev/null
+++ b/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" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..6d57edc
--- /dev/null
+++ b/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
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..4d9593f
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = 'JRConfig'
+
diff --git a/src/main/kotlin/com/romangraef/jrconfig/Config.kt b/src/main/kotlin/com/romangraef/jrconfig/Config.kt
new file mode 100644
index 0000000..7641689
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/Config.kt
@@ -0,0 +1,55 @@
+package com.romangraef.jrconfig
+
+import com.romangraef.jrconfig.variables.IntegerVariable
+import com.romangraef.jrconfig.variables.StringVariable
+
+typealias ConfigVariableProvider<T> = (ConfigProvider, String) -> ConfigVariable<T>
+
+object Config {
+ private var configProvider: ConfigProvider? = null
+ private val map: MutableMap<Class<*>, ConfigVariableProvider<*>> = mutableMapOf()
+ private val proxyProvider: ConfigProvider = object : ConfigProvider {
+
+ override fun provideData(point: String): String? =
+ configProvider?.provideData(point)
+
+
+ override fun setData(point: String, data: String) =
+ configProvider?.setData(point, data) ?: Unit
+ }
+
+ init {
+ map[Int::class.java] = ::IntegerVariable
+ map[String::class.java] = ::StringVariable
+ }
+
+
+ @Suppress("UNCHECKED_CAST")
+ @JvmStatic
+ fun <T> get(clazz: Class<out T>, point: String): ConfigVariable<T> {
+ return (map[clazz] as? ConfigVariableProvider<T>)?.invoke(proxyProvider, point)
+ ?: throw ConfigMissingProviderException(clazz)
+ }
+
+ inline fun <reified T> get(point: String) = get(T::class.java, point)
+
+ @JvmStatic
+ fun <T> registerConfigVariableProvider(clazz: Class<T>, provider: ConfigVariableProvider<T>) {
+ map[clazz] = provider
+ }
+
+ inline fun <reified T> registerConfigVariableProvider(noinline provider: ConfigVariableProvider<T>) =
+ registerConfigVariableProvider(T::class.java, provider)
+
+
+ @JvmStatic
+ fun use(provider: ConfigProvider?) {
+ configProvider = provider
+ }
+
+ @JvmStatic
+ fun getString(point: String): ConfigVariable<String> {
+ return get(String::class.java, point)
+ }
+
+} \ No newline at end of file
diff --git a/src/main/kotlin/com/romangraef/jrconfig/ConfigMissingException.kt b/src/main/kotlin/com/romangraef/jrconfig/ConfigMissingException.kt
new file mode 100644
index 0000000..1b609f9
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/ConfigMissingException.kt
@@ -0,0 +1,5 @@
+package com.romangraef.jrconfig
+
+class ConfigMissingException(val point: String) : RuntimeException("The point $point is missing from your config.") {
+
+}
diff --git a/src/main/kotlin/com/romangraef/jrconfig/ConfigMissingProviderException.kt b/src/main/kotlin/com/romangraef/jrconfig/ConfigMissingProviderException.kt
new file mode 100644
index 0000000..4cf03b8
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/ConfigMissingProviderException.kt
@@ -0,0 +1,4 @@
+package com.romangraef.jrconfig
+
+class ConfigMissingProviderException(val clazz: Class<*>) :
+ RuntimeException("You are missing a config provider for the type ${clazz.canonicalName}")
diff --git a/src/main/kotlin/com/romangraef/jrconfig/ConfigProvider.kt b/src/main/kotlin/com/romangraef/jrconfig/ConfigProvider.kt
new file mode 100644
index 0000000..019cdef
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/ConfigProvider.kt
@@ -0,0 +1,6 @@
+package com.romangraef.jrconfig
+
+interface ConfigProvider {
+ fun provideData(point: String): String?
+ fun setData(point: String, data: String)
+} \ No newline at end of file
diff --git a/src/main/kotlin/com/romangraef/jrconfig/ConfigVariable.kt b/src/main/kotlin/com/romangraef/jrconfig/ConfigVariable.kt
new file mode 100644
index 0000000..5874e76
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/ConfigVariable.kt
@@ -0,0 +1,6 @@
+package com.romangraef.jrconfig
+
+interface ConfigVariable<T> {
+ fun get(): T
+ fun set(value: T)
+} \ No newline at end of file
diff --git a/src/main/kotlin/com/romangraef/jrconfig/FilePropertiesProvider.kt b/src/main/kotlin/com/romangraef/jrconfig/FilePropertiesProvider.kt
new file mode 100644
index 0000000..fda7bf9
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/FilePropertiesProvider.kt
@@ -0,0 +1,45 @@
+package com.romangraef.jrconfig
+
+import java.io.File
+import java.io.FileInputStream
+import java.io.FileOutputStream
+import java.io.IOException
+import java.util.*
+
+class FilePropertiesProvider(private val file: File) : ConfigProvider {
+ private var properties: Properties = Properties()
+
+ init {
+ try {
+ properties.load(FileInputStream(file))
+ } catch (e: IOException) {
+ e.printStackTrace()
+ }
+ }
+
+ companion object {
+ @JvmStatic
+ fun create(fileName: String): ConfigProvider {
+ return FilePropertiesProvider(File(fileName))
+ }
+ }
+
+ override fun provideData(point: String): String? {
+ return properties.getProperty(point)
+ }
+
+ override fun setData(point: String, data: String) {
+ properties.setProperty(point, data)
+ save()
+ }
+
+ private fun save() {
+ try {
+ properties.store(FileOutputStream(file), "application config")
+ } catch (e: IOException) {
+ e.printStackTrace()
+ }
+ }
+
+
+} \ No newline at end of file
diff --git a/src/main/kotlin/com/romangraef/jrconfig/TransformerConfigVariable.kt b/src/main/kotlin/com/romangraef/jrconfig/TransformerConfigVariable.kt
new file mode 100644
index 0000000..ae38409
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/TransformerConfigVariable.kt
@@ -0,0 +1,41 @@
+package com.romangraef.jrconfig
+
+import java.util.function.Function
+
+abstract class TransformerConfigVariable<T>(private val provider: ConfigProvider, private val point: String) :
+ ConfigVariable<T> {
+ protected abstract fun transform(value: String): T
+ protected abstract fun serialize(data: T): String
+
+ override fun get(): T {
+ return transform(provider.provideData(point) ?: throw ConfigMissingException(point))
+ }
+
+
+ override fun set(value: T) =
+ provider.setData(point, serialize(value))
+
+
+ companion object {
+ /**
+ * Quick and dirty. Please consider using a subclass.
+ */
+ fun <T> getVariable(
+ provider: ConfigProvider,
+ point: String,
+ transform: Function<String, T>,
+ serialize: Function<T, String>
+ ): TransformerConfigVariable<T> {
+ return object : TransformerConfigVariable<T>(provider, point) {
+ override fun transform(value: String): T {
+ return transform.apply(value)
+ }
+
+ override fun serialize(data: T): String {
+ return serialize.apply(data)
+ }
+ }
+ }
+ }
+
+} \ No newline at end of file
diff --git a/src/main/kotlin/com/romangraef/jrconfig/variables/IntegerVariable.kt b/src/main/kotlin/com/romangraef/jrconfig/variables/IntegerVariable.kt
new file mode 100644
index 0000000..97cd719
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/variables/IntegerVariable.kt
@@ -0,0 +1,15 @@
+package com.romangraef.jrconfig.variables
+
+import com.romangraef.jrconfig.ConfigProvider
+import com.romangraef.jrconfig.TransformerConfigVariable
+
+class IntegerVariable(provider: ConfigProvider, point: String) :
+ TransformerConfigVariable<Int>(provider, point) {
+ override fun transform(value: String): Int {
+ return value.toInt()
+ }
+
+ override fun serialize(data: Int): String {
+ return data.toString()
+ }
+} \ No newline at end of file
diff --git a/src/main/kotlin/com/romangraef/jrconfig/variables/StringVariable.kt b/src/main/kotlin/com/romangraef/jrconfig/variables/StringVariable.kt
new file mode 100644
index 0000000..62ee801
--- /dev/null
+++ b/src/main/kotlin/com/romangraef/jrconfig/variables/StringVariable.kt
@@ -0,0 +1,15 @@
+package com.romangraef.jrconfig.variables
+
+import com.romangraef.jrconfig.ConfigProvider
+import com.romangraef.jrconfig.TransformerConfigVariable
+
+class StringVariable(provider: ConfigProvider, point: String) :
+ TransformerConfigVariable<String>(provider, point) {
+ override fun transform(value: String): String {
+ return value
+ }
+
+ override fun serialize(data: String): String {
+ return data
+ }
+} \ No newline at end of file
diff --git a/src/test/java/com/romangraef/jrconfig/Main.java b/src/test/java/com/romangraef/jrconfig/Main.java
new file mode 100644
index 0000000..28dc9ec
--- /dev/null
+++ b/src/test/java/com/romangraef/jrconfig/Main.java
@@ -0,0 +1,11 @@
+package com.romangraef.jrconfig;
+
+public class Main {
+
+ public static ConfigVariable<String> token = Config.getString("token");
+
+ public static void main(String[] args) {
+ Config.use(FilePropertiesProvider.create("config.properties"));
+ System.out.println(token.get());
+ }
+}
diff --git a/src/test/kotlin/com/romangraef/jrconfig/MainKt.kt b/src/test/kotlin/com/romangraef/jrconfig/MainKt.kt
new file mode 100644
index 0000000..504b446
--- /dev/null
+++ b/src/test/kotlin/com/romangraef/jrconfig/MainKt.kt
@@ -0,0 +1,8 @@
+package com.romangraef.jrconfig
+
+val token = Config.get<String>("token")
+
+fun main() {
+ Config.use(FilePropertiesProvider.create("config.properties"))
+ println(token.get())
+} \ No newline at end of file