Parse options from environment

[rhynodge.git] / src / main / java / net / pterodactylus / util / envopt / SystemEnvironment.java

diff --git a/src/main/java/net/pterodactylus/util/envopt/SystemEnvironment.java b/src/main/java/net/pterodactylus/util/envopt/SystemEnvironment.java
new file mode 100644 (file)
index 0000000..32398ba
--- /dev/null
+++ b/src/main/java/net/pterodactylus/util/envopt/SystemEnvironment.java
@@ -0,0 +1,18 @@
+package net.pterodactylus.util.envopt;
+
+import java.util.Optional;
+
+/**
+ * {@link Environment} implementation that reads variables from the system environment.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ * @see System#getenv(String)
+ */
+public class SystemEnvironment implements Environment {
+
+       @Override
+       public Optional<String> getValue(String name) {
+               return Optional.ofNullable(System.getenv(name));
+       }
+
+}