Trait arrow::array::cast::AsArray

pub trait AsArray: Sealed {
    // Required methods
    fn as_boolean_opt(&self) -> Option<&BooleanArray>;
    fn as_primitive_opt<T>(&self) -> Option<&PrimitiveArray<T>>
       where T: ArrowPrimitiveType;
    fn as_bytes_opt<T>(&self) -> Option<&GenericByteArray<T>>
       where T: ByteArrayType;
    fn as_struct_opt(&self) -> Option<&StructArray>;
    fn as_list_opt<O>(&self) -> Option<&GenericListArray<O>>
       where O: OffsetSizeTrait;
    fn as_fixed_size_binary_opt(&self) -> Option<&FixedSizeBinaryArray>;
    fn as_fixed_size_list_opt(&self) -> Option<&FixedSizeListArray>;
    fn as_map_opt(&self) -> Option<&MapArray>;
    fn as_dictionary_opt<K>(&self) -> Option<&DictionaryArray<K>>
       where K: ArrowDictionaryKeyType;
    fn as_any_dictionary_opt(&self) -> Option<&dyn AnyDictionaryArray>;

    // Provided methods
    fn as_boolean(&self) -> &BooleanArray { ... }
    fn as_primitive<T>(&self) -> &PrimitiveArray<T>
       where T: ArrowPrimitiveType { ... }
    fn as_bytes<T>(&self) -> &GenericByteArray<T>
       where T: ByteArrayType { ... }
    fn as_string_opt<O>(
        &self,
    ) -> Option<&GenericByteArray<GenericStringType<O>>>
       where O: OffsetSizeTrait { ... }
    fn as_string<O>(&self) -> &GenericByteArray<GenericStringType<O>>
       where O: OffsetSizeTrait { ... }
    fn as_binary_opt<O>(
        &self,
    ) -> Option<&GenericByteArray<GenericBinaryType<O>>>
       where O: OffsetSizeTrait { ... }
    fn as_binary<O>(&self) -> &GenericByteArray<GenericBinaryType<O>>
       where O: OffsetSizeTrait { ... }
    fn as_struct(&self) -> &StructArray { ... }
    fn as_list<O>(&self) -> &GenericListArray<O>
       where O: OffsetSizeTrait { ... }
    fn as_fixed_size_binary(&self) -> &FixedSizeBinaryArray { ... }
    fn as_fixed_size_list(&self) -> &FixedSizeListArray { ... }
    fn as_map(&self) -> &MapArray { ... }
    fn as_dictionary<K>(&self) -> &DictionaryArray<K>
       where K: ArrowDictionaryKeyType { ... }
    fn as_any_dictionary(&self) -> &dyn AnyDictionaryArray { ... }
}

An extension trait for dyn Array that provides ergonomic downcasting

let col = Arc::new(Int32Array::from(vec![1, 2, 3])) as ArrayRef;
assert_eq!(col.as_primitive::<Int32Type>().values(), &[1, 2, 3]);

Required Methods

fn as_boolean_opt(&self) -> Option<&BooleanArray>

Downcast this to a BooleanArray returning None if not possible

fn as_primitive_opt<T>(&self) -> Option<&PrimitiveArray<T>>

where T: ArrowPrimitiveType,

Downcast this to a PrimitiveArray returning None if not possible

fn as_bytes_opt<T>(&self) -> Option<&GenericByteArray<T>>

where T: ByteArrayType,

Downcast this to a GenericByteArray returning None if not possible

fn as_struct_opt(&self) -> Option<&StructArray>

Downcast this to a StructArray returning None if not possible

fn as_list_opt<O>(&self) -> Option<&GenericListArray<O>>

where O: OffsetSizeTrait,

Downcast this to a GenericListArray returning None if not possible

fn as_fixed_size_binary_opt(&self) -> Option<&FixedSizeBinaryArray>

Downcast this to a FixedSizeBinaryArray returning None if not possible

fn as_fixed_size_list_opt(&self) -> Option<&FixedSizeListArray>

Downcast this to a FixedSizeListArray returning None if not possible

fn as_map_opt(&self) -> Option<&MapArray>

Downcast this to a MapArray returning None if not possible

fn as_dictionary_opt<K>(&self) -> Option<&DictionaryArray<K>>

where K: ArrowDictionaryKeyType,

Downcast this to a DictionaryArray returning None if not possible

fn as_any_dictionary_opt(&self) -> Option<&dyn AnyDictionaryArray>

Downcasts this to a AnyDictionaryArray returning None if not possible

Provided Methods

fn as_boolean(&self) -> &BooleanArray

Downcast this to a BooleanArray panicking if not possible

fn as_primitive<T>(&self) -> &PrimitiveArray<T>

where T: ArrowPrimitiveType,

Downcast this to a PrimitiveArray panicking if not possible

fn as_bytes<T>(&self) -> &GenericByteArray<T>

where T: ByteArrayType,

Downcast this to a GenericByteArray panicking if not possible

fn as_string_opt<O>(&self) -> Option<&GenericByteArray<GenericStringType<O>>>

where O: OffsetSizeTrait,

Downcast this to a GenericStringArray returning None if not possible

fn as_string<O>(&self) -> &GenericByteArray<GenericStringType<O>>

where O: OffsetSizeTrait,

Downcast this to a GenericStringArray panicking if not possible

fn as_binary_opt<O>(&self) -> Option<&GenericByteArray<GenericBinaryType<O>>>

where O: OffsetSizeTrait,

Downcast this to a GenericBinaryArray returning None if not possible

fn as_binary<O>(&self) -> &GenericByteArray<GenericBinaryType<O>>

where O: OffsetSizeTrait,

Downcast this to a GenericBinaryArray panicking if not possible

fn as_struct(&self) -> &StructArray

Downcast this to a StructArray panicking if not possible

fn as_list<O>(&self) -> &GenericListArray<O>

where O: OffsetSizeTrait,

Downcast this to a GenericListArray panicking if not possible

fn as_fixed_size_binary(&self) -> &FixedSizeBinaryArray

Downcast this to a FixedSizeBinaryArray panicking if not possible

fn as_fixed_size_list(&self) -> &FixedSizeListArray

Downcast this to a FixedSizeListArray panicking if not possible

fn as_map(&self) -> &MapArray

Downcast this to a MapArray panicking if not possible

fn as_dictionary<K>(&self) -> &DictionaryArray<K>

where K: ArrowDictionaryKeyType,

Downcast this to a DictionaryArray panicking if not possible

fn as_any_dictionary(&self) -> &dyn AnyDictionaryArray

Downcasts this to a AnyDictionaryArray panicking if not possible

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl AsArray for Arc<dyn Array>

fn as_boolean_opt(&self) -> Option<&BooleanArray>

fn as_primitive_opt<T>(&self) -> Option<&PrimitiveArray<T>>

where T: ArrowPrimitiveType,

fn as_bytes_opt<T>(&self) -> Option<&GenericByteArray<T>>

where T: ByteArrayType,

fn as_struct_opt(&self) -> Option<&StructArray>

fn as_list_opt<O>(&self) -> Option<&GenericListArray<O>>

where O: OffsetSizeTrait,

fn as_fixed_size_binary_opt(&self) -> Option<&FixedSizeBinaryArray>

fn as_fixed_size_list_opt(&self) -> Option<&FixedSizeListArray>

fn as_map_opt(&self) -> Option<&MapArray>

fn as_dictionary_opt<K>(&self) -> Option<&DictionaryArray<K>>

where K: ArrowDictionaryKeyType,

fn as_any_dictionary_opt(&self) -> Option<&dyn AnyDictionaryArray>

Implementors

impl AsArray for dyn Array + '_