Struct google_cloud_bigquery::storage::array::GenericByteArray

pub struct GenericByteArray<T>where
    T: ByteArrayType,{ /* private fields */ }

Expand description

An array of variable length byte arrays

See StringArray and LargeStringArray for storing utf8 encoded string data

See BinaryArray and LargeBinaryArray for storing arbitrary bytes

Example: From a Vec

let arr: GenericByteArray<Utf8Type> = vec!["hello", "world", ""].into();
assert_eq!(arr.value_data(), b"helloworld");
assert_eq!(arr.value_offsets(), &[0, 5, 10, 10]);
let values: Vec<_> = arr.iter().collect();
assert_eq!(values, &[Some("hello"), Some("world"), Some("")]);

Example: From an optional Vec

let arr: GenericByteArray<Utf8Type> = vec![Some("hello"), Some("world"), Some(""), None].into();
assert_eq!(arr.value_data(), b"helloworld");
assert_eq!(arr.value_offsets(), &[0, 5, 10, 10, 10]);
let values: Vec<_> = arr.iter().collect();
assert_eq!(values, &[Some("hello"), Some("world"), Some(""), None]);

Example: From an iterator of option

let arr: GenericByteArray<Utf8Type> = (0..5).map(|x| (x % 2 == 0).then(|| x.to_string())).collect();
let values: Vec<_> = arr.iter().collect();
assert_eq!(values, &[Some("0"), None, Some("2"), None, Some("4")]);

Example: Using Builder

let mut builder = GenericByteBuilder::<Utf8Type>::new();
builder.append_value("hello");
builder.append_null();
builder.append_value("world");
let array = builder.finish();
let values: Vec<_> = array.iter().collect();
assert_eq!(values, &[Some("hello"), None, Some("world")]);

Implementations§

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impl<OffsetSize> GenericByteArray<GenericBinaryType<OffsetSize>>where OffsetSize: OffsetSizeTrait,

pub const fn get_data_type() -> DataType

👎Deprecated: please use Self::DATA_TYPE instead

Get the data type of the array.

pub fn from_vec( v: Vec<&[u8], Global> ) -> GenericByteArray<GenericBinaryType<OffsetSize>>

Creates a GenericBinaryArray from a vector of byte slices

pub fn from_opt_vec( v: Vec<Option<&[u8]>, Global> ) -> GenericByteArray<GenericBinaryType<OffsetSize>>

Creates a GenericBinaryArray from a vector of Optional (null) byte slices

pub fn from_iter_values<Ptr, I>( iter: I ) -> GenericByteArray<GenericBinaryType<OffsetSize>>where Ptr: AsRef<[u8]>, I: IntoIterator<Item = Ptr>,

Creates a GenericBinaryArray based on an iterator of values without nulls

pub fn take_iter<'a>( &'a self, indexes: impl Iterator<Item = Option<usize>> + 'a ) -> impl Iterator<Item = Option<&'a [u8]>> + 'a

Returns an iterator that returns the values of array.value(i) for an iterator with each element i

pub unsafe fn take_iter_unchecked<'a>( &'a self, indexes: impl Iterator<Item = Option<usize>> + 'a ) -> impl Iterator<Item = Option<&'a [u8]>> + 'a

Returns an iterator that returns the values of array.value(i) for an iterator with each element i

Safety

caller must ensure that the indexes in the iterator are less than the array.len()

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impl<T> GenericByteArray<T>where T: ByteArrayType,

pub const DATA_TYPE: DataType = T::DATA_TYPE

Data type of the array.

pub fn new( offsets: OffsetBuffer<<T as ByteArrayType>::Offset>, values: Buffer, nulls: Option<NullBuffer> ) -> GenericByteArray<T>

Create a new GenericByteArray from the provided parts, panicking on failure

Panics

Panics if GenericByteArray::try_new returns an error

pub fn try_new( offsets: OffsetBuffer<<T as ByteArrayType>::Offset>, values: Buffer, nulls: Option<NullBuffer> ) -> Result<GenericByteArray<T>, ArrowError>

Create a new GenericByteArray from the provided parts, returning an error on failure

Errors

offsets.len() - 1 != nulls.len()
Any consecutive pair of offsets does not denote a valid slice of values

pub fn new_unchecked( offsets: OffsetBuffer<<T as ByteArrayType>::Offset>, values: Buffer, nulls: Option<NullBuffer> ) -> GenericByteArray<T>

Create a new GenericByteArray from the provided parts, without validation

pub fn new_null(len: usize) -> GenericByteArray<T>

Create a new GenericByteArray of length len where all values are null

pub fn into_parts( self ) -> (OffsetBuffer<<T as ByteArrayType>::Offset>, Buffer, Option<NullBuffer>)

Deconstruct this array into its constituent parts

pub fn value_length(&self, i: usize) -> <T as ByteArrayType>::Offset

Returns the length for value at index i.

pub fn offsets(&self) -> &OffsetBuffer<<T as ByteArrayType>::Offset>

Returns a reference to the offsets of this array

Unlike Self::value_offsets this returns the OffsetBuffer allowing for zero-copy cloning

pub fn values(&self) -> &Buffer

Returns the values of this array

Unlike Self::value_data this returns the Buffer allowing for zero-copy cloning

pub fn value_data(&self) -> &[u8] ⓘ

Returns the raw value data

pub fn is_ascii(&self) -> bool

Returns true if all data within this array is ASCII

pub fn value_offsets(&self) -> &[<T as ByteArrayType>::Offset]

Returns the offset values in the offsets buffer

pub unsafe fn value_unchecked(&self, i: usize) -> &<T as ByteArrayType>::Native

Returns the element at index i

Safety

Caller is responsible for ensuring that the index is within the bounds of the array

pub fn value(&self, i: usize) -> &<T as ByteArrayType>::Native

Returns the element at index i

pub fn iter(&self) -> ArrayIter<&GenericByteArray<T>> ⓘ

constructs a new iterator

pub fn slice(&self, offset: usize, length: usize) -> GenericByteArray<T>

Returns a zero-copy slice of this array with the indicated offset and length.

pub fn into_builder(self) -> Result<GenericByteBuilder<T>, GenericByteArray<T>>

Returns GenericByteBuilder of this byte array for mutating its values if the underlying offset and data buffers are not shared by others.

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impl<OffsetSize> GenericByteArray<GenericStringType<OffsetSize>>where OffsetSize: OffsetSizeTrait,

pub const fn get_data_type() -> DataType

👎Deprecated: please use Self::DATA_TYPE instead

Get the data type of the array.

pub fn num_chars(&self, i: usize) -> usize

Returns the number of Unicode Scalar Value in the string at index i.

This function has O(n) time complexity where n is the string length. If you can make sure that all chars in the string are in the range U+0x0000 ~ U+0x007F, please use the function value_length which has O(1) time complexity.

pub fn from_iter_values<Ptr, I>( iter: I ) -> GenericByteArray<GenericStringType<OffsetSize>>where Ptr: AsRef<str>, I: IntoIterator<Item = Ptr>,

Creates a GenericStringArray based on an iterator of values without nulls

pub fn take_iter<'a>( &'a self, indexes: impl Iterator<Item = Option<usize>> + 'a ) -> impl Iterator<Item = Option<&'a str>> + 'a

Returns an iterator that returns the values of array.value(i) for an iterator with each element i

pub unsafe fn take_iter_unchecked<'a>( &'a self, indexes: impl Iterator<Item = Option<usize>> + 'a ) -> impl Iterator<Item = Option<&'a str>> + 'a

Returns an iterator that returns the values of array.value(i) for an iterator with each element i

Safety

caller must ensure that the indexes in the iterator are less than the array.len()

pub fn try_from_binary( v: GenericByteArray<GenericBinaryType<OffsetSize>> ) -> Result<GenericByteArray<GenericStringType<OffsetSize>>, ArrowError>

Fallibly creates a GenericStringArray from a GenericBinaryArray returning an error if GenericBinaryArray contains invalid UTF-8 data

Trait Implementations§

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impl<T> Array for GenericByteArray<T>where T: ByteArrayType,

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fn as_any(&self) -> &(dyn Any + 'static)

Returns the array as Any so that it can be downcasted to a specific implementation. Read more

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fn to_data(&self) -> ArrayData

Returns the underlying data of this array

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fn into_data(self) -> ArrayData

Returns the underlying data of this array Read more

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fn data_type(&self) -> &DataType

Returns a reference to the DataType of this array. Read more

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fn slice(&self, offset: usize, length: usize) -> Arc<dyn Array, Global>

Returns a zero-copy slice of this array with the indicated offset and length. Read more

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fn len(&self) -> usize

Returns the length (i.e., number of elements) of this array. Read more

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fn is_empty(&self) -> bool

Returns whether this array is empty. Read more

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fn offset(&self) -> usize

Returns the offset into the underlying data used by this array(-slice). Note that the underlying data can be shared by many arrays. This defaults to 0. Read more

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fn nulls(&self) -> Option<&NullBuffer>

Returns the null buffers of this array if any

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fn get_buffer_memory_size(&self) -> usize

Returns the total number of bytes of memory pointed to by this array. The buffers store bytes in the Arrow memory format, and include the data as well as the validity map.

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fn get_array_memory_size(&self) -> usize

Returns the total number of bytes of memory occupied physically by this array. This value will always be greater than returned by get_buffer_memory_size() and includes the overhead of the data structures that contain the pointers to the various buffers.

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