BuilderSpecificState

parquet_variant

Trait BuilderSpecificState 

Source 
pub trait BuilderSpecificState: Debug {
    // Provided methods
    fn finish(
        &mut self,
        _metadata_builder: &mut dyn MetadataBuilder,
        _value_builder: &mut ValueBuilder,
    ) { ... }
    fn rollback(&mut self) { ... }
}
Expand description

A trait for managing state specific to different builder types.

Provided Methods§

Source

fn finish( &mut self, _metadata_builder: &mut dyn MetadataBuilder, _value_builder: &mut ValueBuilder, )

Called by ParentState::finish to apply any pending builder-specific changes.

The provided implementation does nothing by default.

Parameters:

  • metadata_builder: The metadata builder that was used
  • value_builder: The value builder that was used
Source

fn rollback(&mut self)

Called by ParentState::drop to revert any changes that were eagerly applied, if ParentState::finish was never invoked.

The provided implementation does nothing by default.

The base ParentState will handle rolling back the value and metadata builders, but builder-specific state may need to revert its own changes.

Implementations on Foreign Types§

Source§

impl BuilderSpecificState for ()

Empty no-op implementation for top-level variant building

Implementors§