Introduce a BytesDecodeOwned trait in heed_codecs

milli/src/heed_codec/roaring_bitmap_length/bo_roaring_bitmap_len_codec.rs

@@ -1,11 +1,23 @@
 use std::mem;
 
+use heed::BytesDecode;
+
+use crate::heed_codec::BytesDecodeOwned;
+
 pub struct BoRoaringBitmapLenCodec;
 
-impl heed::BytesDecode<'_> for BoRoaringBitmapLenCodec {
+impl BytesDecode<'_> for BoRoaringBitmapLenCodec {
     type DItem = u64;
 
     fn bytes_decode(bytes: &[u8]) -> Option<Self::DItem> {
         Some((bytes.len() / mem::size_of::<u32>()) as u64)
     }
 }
+
+impl BytesDecodeOwned for BoRoaringBitmapLenCodec {
+    type DItem = u64;
+
+    fn bytes_decode_owned(bytes: &[u8]) -> Option<Self::DItem> {
+        Self::bytes_decode(bytes)
+    }
+}

milli/src/heed_codec/roaring_bitmap_length/cbo_roaring_bitmap_len_codec.rs

@@ -1,11 +1,14 @@
 use std::mem;
 
+use heed::BytesDecode;
+
 use super::{BoRoaringBitmapLenCodec, RoaringBitmapLenCodec};
 use crate::heed_codec::roaring_bitmap::cbo_roaring_bitmap_codec::THRESHOLD;
+use crate::heed_codec::BytesDecodeOwned;
 
 pub struct CboRoaringBitmapLenCodec;
 
-impl heed::BytesDecode<'_> for CboRoaringBitmapLenCodec {
+impl BytesDecode<'_> for CboRoaringBitmapLenCodec {
     type DItem = u64;
 
     fn bytes_decode(bytes: &[u8]) -> Option<Self::DItem> {
@@ -20,3 +23,11 @@ impl heed::BytesDecode<'_> for CboRoaringBitmapLenCodec {
         }
     }
 }
+
+impl BytesDecodeOwned for CboRoaringBitmapLenCodec {
+    type DItem = u64;
+
+    fn bytes_decode_owned(bytes: &[u8]) -> Option<Self::DItem> {
+        Self::bytes_decode(bytes)
+    }
+}

milli/src/heed_codec/roaring_bitmap_length/roaring_bitmap_len_codec.rs

@@ -3,6 +3,8 @@ use std::mem;
 
 use byteorder::{LittleEndian, ReadBytesExt};
 
+use crate::heed_codec::BytesDecodeOwned;
+
 const SERIAL_COOKIE_NO_RUNCONTAINER: u32 = 12346;
 const SERIAL_COOKIE: u16 = 12347;
 
@@ -59,6 +61,14 @@ impl heed::BytesDecode<'_> for RoaringBitmapLenCodec {
     }
 }
 
+impl BytesDecodeOwned for RoaringBitmapLenCodec {
+    type DItem = u64;
+
+    fn bytes_decode_owned(bytes: &[u8]) -> Option<Self::DItem> {
+        RoaringBitmapLenCodec::deserialize_from_slice(bytes).ok()
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use heed::BytesEncode;