1 files changed, 62 insertions, 0 deletions
diff --git a/src/main/java/org/bukkit/plugin/java/annotation/plugin/ApiVersion.java b/src/main/java/org/bukkit/plugin/java/annotation/plugin/ApiVersion.java
new file mode 100644
index 0000000..b7f1e24
--- /dev/null
+++ b/src/main/java/org/bukkit/plugin/java/annotation/plugin/ApiVersion.java
@@ -0,0 +1,62 @@
+package org.bukkit.plugin.java.annotation.plugin;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.util.Collection;
+
+
+/**
+ * This annotation specifies the api version of the plugin.
+ * <br>
+ * Defaults to {@link ApiVersion.Target#DEFAULT}.
+ * <br>
+ * Pre-1.13 plugins do not need to use this annotation.
+ */
+@Documented
+@Retention( RetentionPolicy.SOURCE )
+@Target( ElementType.TYPE )
+public @interface ApiVersion {
+
+    Target value() default Target.DEFAULT;
+
+    /**
+     * Specifies the target api-version for this plugin.
+     *
+     * All pre-1.13 plugins must use {@link #DEFAULT}.
+     */
+    public static enum Target {
+        /**
+         * This target version specifies that the plugin was made for pre-1.13 Spigot versions.
+         */
+        DEFAULT( null ),
+
+        /**
+         * This target version specifies that the plugin was made with 1.13+ versions in mind.
+         */
+        v1_13( "1.13", DEFAULT );
+
+
+        private final String version;
+        private final Collection<Target> conflictsWith = Sets.newLinkedHashSet();
+
+        private Target(String version, Target... conflictsWith) {
+            this.version = version;
+            this.conflictsWith.addAll( Lists.newArrayList( conflictsWith ) );
+        }
+
+
+        public String getVersion() {
+            return version;
+        }
+
+        public boolean conflictsWith(Target target) {
+            return this.conflictsWith.contains( target );
+        }
+    }
+}