Struct DataArraySlice 

pub struct DataArraySlice<'a> {
    pub start: usize,
    pub end: usize,
    /* private fields */
}

Represent a slice of a DataArray that manages offsets and decoding automatically.

This does not copy the data.

Fields

start: usize

The start of the slice, in bytes

end: usize

The end of the slice, in bytes

Implementations

impl<'a> DataArraySlice<'a>

pub fn new(source: &'a DataArray, start: usize, end: usize) -> Self

Construct a new DataArraySlice

pub fn decode(&'a self) -> Result<Cow<'a, [u8]>, ArrayRetrievalError>

Decompress and base64-decode encoded bytes, and return the data.

If the data were already decoded, the existing bytes are returned. Otherwise one or more buffers may be allocated to hold the decompressed and decoded bytes.

This is a thin wrapper around DataArray::decoded_slice.

pub const fn is_ion_mobility(&self) -> bool

Test if the the array describes an ion mobility quantity.

See also

ArrayType::is_ion_mobility

pub fn source(&self) -> &'a DataArray

Get an reference to the source DataArray

Trait Implementations

impl<'transient, 'lifespan: 'transient> ByteArrayView<'transient, 'lifespan> for DataArraySlice<'lifespan>

fn view(&'lifespan self) -> Result<Cow<'lifespan, [u8]>, ArrayRetrievalError>

The core method that exposes the decoded byte array that the type must provide.

fn dtype(&self) -> BinaryDataArrayType

The real data type encoded in bytes

fn unit(&self) -> Unit

The unit of measurement each data point is in

fn name(&self) -> &ArrayType

The kind of array this is

fn data_processing_reference(&self) -> Option<&str>

Get the identifier referencing a DataProcessing

fn coerce_from<T: Pod>( buffer: Cow<'transient, [u8]>, ) -> Result<Cow<'transient, [T]>, ArrayRetrievalError>

This is a helper method for the various to_<type> methods like Self::to_f64. It should not need to be called directly. This method relies on bytemuck::try_cast_slice to do the heavy lifting.

fn coerce<T: Pod>( &'lifespan self, ) -> Result<Cow<'transient, [T]>, ArrayRetrievalError>

This is a helper method for the various to_<type> methods like Self::to_f64. It should not need to be called directly. This calls into Self::coerce_from internally after decoding.

fn convert<S: Num + Clone + AsPrimitive<D> + Pod, D: Num + Clone + Copy + 'static>( &'lifespan self, ) -> Result<Cow<'transient, [D]>, ArrayRetrievalError>

Decode the array, then copy it to a new array, converting each element from type D to to type S

fn to_f32( &'lifespan self, ) -> Result<Cow<'transient, [f32]>, ArrayRetrievalError>

Get a view of the data as f32. If the data are stored that way already, no copy is required.

fn to_f64( &'lifespan self, ) -> Result<Cow<'transient, [f64]>, ArrayRetrievalError>

Get a view of the data as f64. If the data are stored that way already, no copy is required.

fn to_i32( &'lifespan self, ) -> Result<Cow<'transient, [i32]>, ArrayRetrievalError>

Get a view of the data as i32. If the data are stored that way already, no copy is required.

fn to_i64( &'lifespan self, ) -> Result<Cow<'transient, [i64]>, ArrayRetrievalError>

Get a view of the data as i64. If the data are stored that way already, no copy is required.

fn data_len(&'lifespan self) -> Result<usize, ArrayRetrievalError>

The size of encoded array in terms of # of elements of the BinaryDataArrayType given by ByteArrayView::dtype

fn iter_type<T: Pod>( &'lifespan self, ) -> Result<DataSliceIter<'lifespan, T>, ArrayRetrievalError>

fn iter_u8( &'lifespan self, ) -> Result<DataSliceIter<'lifespan, u8>, ArrayRetrievalError>

fn iter_f32( &'lifespan self, ) -> Result<DataSliceIter<'lifespan, f32>, ArrayRetrievalError>

fn iter_f64( &'lifespan self, ) -> Result<DataSliceIter<'lifespan, f64>, ArrayRetrievalError>

fn iter_i32( &'lifespan self, ) -> Result<DataSliceIter<'lifespan, i32>, ArrayRetrievalError>

fn iter_i64( &'lifespan self, ) -> Result<DataSliceIter<'lifespan, i64>, ArrayRetrievalError>

impl<'a> Clone for DataArraySlice<'a>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for DataArraySlice<'a>

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

Formats the value using the given formatter.