Struct ShapeResolver

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pub struct ShapeResolver { /* private fields */ }

Expand description

Resolves differences between source and target shapes.

Used when reading data that was written with an older shape version using a newer shape, or vice versa.

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impl ShapeResolver

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pub fn new(source: RowShape, target: RowShape) -> Option<Self>

Create a resolver to read data from source shape as target shape.

Returns None if the shapes are incompatible (e.g., type mismatch on same-named field without valid widening path).

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pub fn source(&self) -> &RowShape

Get the source shape

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pub fn target(&self) -> &RowShape

Get the target shape

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pub fn mappings(&self) -> &[FieldMapping]

Get the field mappings

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pub fn is_identity(&self) -> bool

Check if this is an identity mapping (source == target)

Trait Implementations§

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impl Debug for ShapeResolver

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl UnwindSafe for ShapeResolver

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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