initial commit

src/main/kotlin/net/keinekekse/config/config.kt

@@ -0,0 +1,40 @@
+package net.keinekekse.config
+
+import java.io.InputStream
+import java.util.*
+
+private const val CONFIG_FILE_NAME = "config.properties"
+private const val ERROR_LOADING_CONFIG = "Could not load configuration from $CONFIG_FILE_NAME"
+
+// TODO mit WAR testen wg. Pfad zu config.properties
+/**
+ * Projekt-Properties
+ *
+ * Die Datei ```config.properties``` wird aus dem JAR-root geladen.
+ * (-> in ```main/resources``` anlegen)
+ *
+ * ```
+ * val prop: String = ConfigProperties.get("some.prop")
+ * ```
+ */
+object ConfigProperties {
+    private val properties = Properties()
+
+    init {
+        loadConfigFile()
+    }
+
+    private fun loadConfigFile() {
+        val configFileStream: InputStream? =
+            javaClass.classLoader.getResourceAsStream(CONFIG_FILE_NAME)
+        if (configFileStream == null) {
+            throw IllegalStateException(ERROR_LOADING_CONFIG)
+        }
+
+        configFileStream.use {
+            properties.load(it)
+        }
+    }
+
+    fun get(key: String): String = properties.getProperty(key)
+}