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Codec

sift_query_core

Trait Codec 

Source 
pub trait Codec:
    Send
    + Sync
    + Debug {
    // Required methods
    fn name(&self) -> &'static str;
    fn supports(&self, field: &FieldMeta) -> bool;
    fn parse(
        &self,
        field: &FieldMeta,
        input: &str,
    ) -> Result<ScalarValue, String>;

    // Provided methods
    fn format_input(
        &self,
        field: &FieldMeta,
        value: &ScalarValue,
    ) -> Result<String, String> { ... }
    fn format_result(
        &self,
        _field: &FieldMeta,
        value: RowValue,
    ) -> Result<RowValue, String> { ... }
    fn fingerprint(&self) -> u64 { ... }
}
Expand description

A server-owned input/result conversion codec.

Required Methods§

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fn name(&self) -> &'static str

Stable name used in schema and policy fingerprints.

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fn supports(&self, field: &FieldMeta) -> bool

Whether this codec handles the field.

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fn parse(&self, field: &FieldMeta, input: &str) -> Result<ScalarValue, String>

Convert one external value into the field’s validated query value.

Provided Methods§

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fn format_input( &self, field: &FieldMeta, value: &ScalarValue, ) -> Result<String, String>

Canonical RPC representation. Encoders verify that parsing this text recovers the original database value; lossy codecs must override it.

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fn format_result( &self, _field: &FieldMeta, value: RowValue, ) -> Result<RowValue, String>

Convert one decoded result value into its public representation.

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fn fingerprint(&self) -> u64

Stable identity including codec configuration.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§