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SyncNamedGraph

terminus_store::store::sync

Struct SyncNamedGraph 

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pub struct SyncNamedGraph { /* private fields */ }
Expand description

A named graph in terminus-store.

Named graphs in terminus-store are basically just a label pointing to a layer. Opening a read transaction to a named graph is just getting hold of the layer it points at, as layers are read-only. Writing to a named graph is just making it point to a new layer.

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impl SyncNamedGraph

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pub fn name(&self) -> &str

Returns the label name itself.

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pub fn head_version(&self) -> Result<(Option<SyncStoreLayer>, u64)>

Returns the layer this database points at, as well as the label version.

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pub fn head(&self) -> Result<Option<SyncStoreLayer>>

Returns the layer this database points at.

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pub fn set_head(&self, layer: &SyncStoreLayer) -> Result<bool, Error>

Set the database label to the given layer if it is a valid ancestor, returning false otherwise.

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pub fn force_set_head(&self, layer: &SyncStoreLayer) -> Result<(), Error>

Set the database label to the given layer, even if it is not a valid ancestor.

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pub fn force_set_head_version( &self, layer: &SyncStoreLayer, version: u64, ) -> Result<bool>

Set the database label to the given layer, even if it is not a valid ancestor. Also checks given version, and if it doesn’t match, the update won’t happen and false will be returned.

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pub fn delete(&self) -> Result<()>

Trait Implementations§

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impl Clone for SyncNamedGraph

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fn clone(&self) -> SyncNamedGraph

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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