From fdee97c9a19cc7b3b64ca3b67fbe873ae9278c27 Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Mon, 26 Jun 2017 19:28:36 +0200
Subject: [PATCH] Add Annotateable::is_annotation()

---
 libimagannotation/src/annotateable.rs | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/libimagannotation/src/annotateable.rs b/libimagannotation/src/annotateable.rs
index 698773cb..8827916a 100644
--- a/libimagannotation/src/annotateable.rs
+++ b/libimagannotation/src/annotateable.rs
@@ -40,6 +40,9 @@ pub trait Annotateable {
     /// A new annotation also has the field `annotation.is_annotation` set to `true`.
     fn annotate<'a>(&mut self, store: &'a Store, ann_name: &str) -> Result<FileLockEntry<'a>>;
 
+    /// Check whether an entry is an annotation
+    fn is_annotation(&self) -> Result<bool>;
+
 }
 
 impl Annotateable for Entry {
@@ -66,5 +69,16 @@ impl Annotateable for Entry {
             })
     }
 
+    fn is_annotation(&self) -> Result<bool> {
+        self.get_header()
+            .read("annotation.is_annotation")
+            .map_err_into(AEK::StoreReadError)
+            .and_then(|res| match res {
+                Some(Value::Boolean(b)) => Ok(b),
+                None                    => Ok(false),
+                _                       => Err(AEK::HeaderTypeError.into_error()),
+            })
+    }
+
 }