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49 lines
1.6 KiB
Rust
49 lines
1.6 KiB
Rust
use crate::database::HasRawValue;
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use crate::{Database, Decode};
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pub trait Row: 'static + Send + Sync {
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type Database: Database;
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/// Returns `true` if the row contains only `NULL` values.
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fn is_null(&self) -> bool;
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/// Returns the number of columns in the row.
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fn len(&self) -> usize;
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/// Returns `true` if there are no columns in the row.
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fn is_empty(&self) -> bool {
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self.len() == 0
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}
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/// Returns a reference to the columns in the row.
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fn columns(&self) -> &[<Self::Database as Database>::Column];
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/// Returns the column name, given the ordinal (also known as index) of the column.
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fn column_name_of(&self, ordinal: usize) -> &str;
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/// Returns the column name, given the ordinal (also known as index) of the column.
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fn try_column_name_of(&self, ordinal: usize) -> crate::Result<&str>;
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/// Returns the column ordinal, given the name of the column.
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fn ordinal_of(&self, name: &str) -> usize;
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/// Returns the column ordinal, given the name of the column.
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fn try_ordinal_of(&self, name: &str) -> crate::Result<usize>;
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/// Returns the decoded value at the index.
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fn try_get<'r, T>(&'r self, index: usize) -> crate::Result<T>
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where
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T: Decode<'r, Self::Database>;
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/// Returns the raw representation of the value at the index.
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// noinspection RsNeedlessLifetimes
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fn try_get_raw<'r>(
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&'r self,
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index: usize,
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) -> crate::Result<<Self::Database as HasRawValue<'r>>::RawValue>;
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}
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// TODO: fn type_info_of(index)
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// TODO: fn try_type_info_of(index)
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// TODO: trait ColumnIndex
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