Struct parquet2::read::BasicDecompressor
source · [−]pub struct BasicDecompressor<I: Iterator<Item = Result<CompressedDataPage>>> { /* private fields */ }
Expand description
A FallibleStreamingIterator
that decompresses CompressedDataPage
into DataPage
.
Implementation
This decompressor uses an internal Vec<u8>
to perform decompressions which
is re-used across pages, so that a single allocation is required.
If the pages are not compressed, the internal buffer is not used.
Implementations
Returns a new BasicDecompressor
.
Returns its internal buffer, consuming itself.
Trait Implementations
impl<I> FallibleStreamingIterator for BasicDecompressor<I> where
I: Iterator<Item = Result<CompressedDataPage>>,
impl<I> FallibleStreamingIterator for BasicDecompressor<I> where
I: Iterator<Item = Result<CompressedDataPage>>,
type Error = ParquetError
type Error = ParquetError
The error type of iteration.
Advances the iterator, returning the next element. Read more
Returns bounds on the number of remaining elements in the iterator.
Determines if all elements of the iterator satisfy a predicate.
Determines if any elements of the iterator satisfy a predicate.
Returns the number of remaining elements in the iterator.
Returns an iterator which filters elements by a predicate.
Returns the first element of the iterator which satisfies a predicate.
Calls a closure on each element of an iterator.
Returns an iterator which is well-behaved at the beginning and end of iteration.
Returns an iterator which applies a transform to elements.
Returns an iterator which applies a transform to elements. Read more
Returns an iterator that applies a transform to errors.
Returns the nth
element of the iterator.
Returns the position of the first element matching a predicate.
Returns an iterator which skips the first sequence of elements matching a predicate.
Returns an iterator which only returns the first n
elements.