polars_arrow_format::ipc

Struct SchemaBuilder

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pub struct SchemaBuilder<State>(/* private fields */);
Expand description

Builder for serializing an instance of the Schema type.

Can be created using the Schema::builder method.

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impl SchemaBuilder<()>

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pub fn endianness<T0>(self, value: T0) -> SchemaBuilder<(T0,)>
where T0: WriteAsDefault<Endianness, Endianness>,

Setter for the endianness field.

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pub fn endianness_as_default(self) -> SchemaBuilder<(DefaultValue,)>

Sets the endianness field to the default value.

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impl<T0> SchemaBuilder<(T0,)>

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pub fn fields<T1>(self, value: T1) -> SchemaBuilder<(T0, T1)>
where T1: WriteAsOptional<Offset<[Offset<Field>]>>,

Setter for the fields field.

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pub fn fields_as_null(self) -> SchemaBuilder<(T0, ())>

Sets the fields field to null.

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impl<T0, T1> SchemaBuilder<(T0, T1)>

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pub fn custom_metadata<T2>(self, value: T2) -> SchemaBuilder<(T0, T1, T2)>
where T2: WriteAsOptional<Offset<[Offset<KeyValue>]>>,

Setter for the custom_metadata field.

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pub fn custom_metadata_as_null(self) -> SchemaBuilder<(T0, T1, ())>

Sets the custom_metadata field to null.

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impl<T0, T1, T2> SchemaBuilder<(T0, T1, T2)>

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pub fn features<T3>(self, value: T3) -> SchemaBuilder<(T0, T1, T2, T3)>
where T3: WriteAsOptional<Offset<[Feature]>>,

Setter for the features field.

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pub fn features_as_null(self) -> SchemaBuilder<(T0, T1, T2, ())>

Sets the features field to null.

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impl<T0, T1, T2, T3> SchemaBuilder<(T0, T1, T2, T3)>

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pub fn finish(self, builder: &mut Builder) -> Offset<Schema>
where Self: WriteAsOffset<Schema>,

Finish writing the builder to get an Offset to a serialized Schema.

Trait Implementations§

Auto Trait Implementations§

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impl<State> Freeze for SchemaBuilder<State>
where State: Freeze,

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impl<State> RefUnwindSafe for SchemaBuilder<State>
where State: RefUnwindSafe,

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impl<State> Send for SchemaBuilder<State>
where State: Send,

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impl<State> Sync for SchemaBuilder<State>
where State: Sync,

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impl<State> Unpin for SchemaBuilder<State>
where State: Unpin,

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impl<State> UnwindSafe for SchemaBuilder<State>
where State: UnwindSafe,

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, U> Into<U> 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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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.