Simplify some storage errors and deduplicate them

lib/oxigraph/src/storage/backend/fallback.rs

@@ -36,7 +36,7 @@ impl Db {
         if self.0.read().unwrap().contains_key(&column_family) {
             Ok(column_family)
         } else {
-            Err(CorruptionError::msg(format!("Column family {name} does not exist")).into())
+            Err(CorruptionError::from_missing_column_family_name(name).into())
         }
     }
 

lib/oxigraph/src/storage/backend/rocksdb.rs

@@ -548,7 +548,7 @@ impl Db {
                 return Ok(ColumnFamily(*cf_handle));
             }
         }
-        Err(CorruptionError::msg(format!("Column family {name} does not exist")).into())
+        Err(CorruptionError::from_missing_column_family_name(name).into())
     }
 
     #[must_use]

lib/oxigraph/src/storage/error.rs

@@ -1,5 +1,7 @@
 use crate::io::{ParseError, RdfFormat};
+use crate::storage::numeric_encoder::EncodedTerm;
 use oxiri::IriParseError;
+use oxrdf::TermRef;
 use std::error::Error;
 use std::io;
 
@@ -45,6 +47,18 @@ impl CorruptionError {
         Self::Other(error.into())
     }
 
+    #[inline]
+    pub(crate) fn from_encoded_term(encoded: &EncodedTerm, term: &TermRef<'_>) -> Self {
+        // TODO: eventually use a dedicated error enum value
+        Self::new(format!("Invalid term encoding {encoded:?} for {term}"))
+    }
+
+    #[inline]
+    pub(crate) fn from_missing_column_family_name(name: &'static str) -> Self {
+        // TODO: eventually use a dedicated error enum value
+        Self::new(format!("Column family {name} does not exist"))
+    }
+
     /// Builds an error from a printable error message.
     #[inline]
     pub(crate) fn msg(msg: impl Into<String>) -> Self {

lib/oxigraph/src/storage/numeric_encoder.rs

@@ -713,19 +713,13 @@ pub fn insert_term<F: FnMut(&StrHash, &str) -> Result<(), StorageError>>(
             if let EncodedTerm::NamedNode { iri_id } = encoded {
                 insert_str(iri_id, node.as_str())
             } else {
-                Err(
-                    CorruptionError::new(format!("Invalid term encoding {encoded:?} for {term}"))
-                        .into(),
-                )
+                Err(CorruptionError::from_encoded_term(encoded, &term).into())
             }
         }
         TermRef::BlankNode(node) => match encoded {
             EncodedTerm::BigBlankNode { id_id } => insert_str(id_id, node.as_str()),
             EncodedTerm::SmallBlankNode(..) | EncodedTerm::NumericalBlankNode { .. } => Ok(()),
-            _ => Err(
-                CorruptionError::new(format!("Invalid term encoding {encoded:?} for {term}"))
-                    .into(),
-            ),
+            _ => Err(CorruptionError::from_encoded_term(encoded, &term).into()),
         },
         TermRef::Literal(literal) => match encoded {
             EncodedTerm::BigStringLiteral { value_id }
@@ -736,10 +730,7 @@ pub fn insert_term<F: FnMut(&StrHash, &str) -> Result<(), StorageError>>(
                 if let Some(language) = literal.language() {
                     insert_str(language_id, language)
                 } else {
-                    Err(CorruptionError::new(format!(
-                        "Invalid term encoding {encoded:?} for {term}"
-                    ))
-                    .into())
+                    Err(CorruptionError::from_encoded_term(encoded, &term).into())
                 }
             }
             EncodedTerm::BigBigLangStringLiteral {
@@ -750,10 +741,7 @@ pub fn insert_term<F: FnMut(&StrHash, &str) -> Result<(), StorageError>>(
                 if let Some(language) = literal.language() {
                     insert_str(language_id, language)
                 } else {
-                    Err(CorruptionError::new(format!(
-                        "Invalid term encoding {encoded:?} for {term}"
-                    ))
-                    .into())
+                    Err(CorruptionError::from_encoded_term(encoded, &term).into())
                 }
             }
             EncodedTerm::SmallTypedLiteral { datatype_id, .. } => {
@@ -784,10 +772,7 @@ pub fn insert_term<F: FnMut(&StrHash, &str) -> Result<(), StorageError>>(
             | EncodedTerm::DurationLiteral(..)
             | EncodedTerm::YearMonthDurationLiteral(..)
             | EncodedTerm::DayTimeDurationLiteral(..) => Ok(()),
-            _ => Err(
-                CorruptionError::new(format!("Invalid term encoding {encoded:?} for {term}"))
-                    .into(),
-            ),
+            _ => Err(CorruptionError::from_encoded_term(encoded, &term).into()),
         },
         TermRef::Triple(triple) => {
             if let EncodedTerm::Triple(encoded) = encoded {
@@ -799,10 +784,7 @@ pub fn insert_term<F: FnMut(&StrHash, &str) -> Result<(), StorageError>>(
                 )?;
                 insert_term(triple.object.as_ref(), &encoded.object, insert_str)
             } else {
-                Err(
-                    CorruptionError::new(format!("Invalid term encoding {encoded:?} for {term}"))
-                        .into(),
-                )
+                Err(CorruptionError::from_encoded_term(encoded, &term).into())
             }
         }
     }