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use super::BinaryViewArrayGeneric;
use crate::array::binview::ViewType;
use crate::array::{ArrayAccessor, ArrayValuesIter, MutableBinaryViewArray};
use crate::bitmap::utils::{BitmapIter, ZipValidity};

unsafe impl<'a, T: ViewType + ?Sized> ArrayAccessor<'a> for BinaryViewArrayGeneric<T> {
    type Item = &'a T;

    #[inline]
    unsafe fn value_unchecked(&'a self, index: usize) -> Self::Item {
        self.value_unchecked(index)
    }

    #[inline]
    fn len(&self) -> usize {
        self.views.len()
    }
}

/// Iterator of values of an [`BinaryArray`].
pub type BinaryViewValueIter<'a, T> = ArrayValuesIter<'a, BinaryViewArrayGeneric<T>>;

impl<'a, T: ViewType + ?Sized> IntoIterator for &'a BinaryViewArrayGeneric<T> {
    type Item = Option<&'a T>;
    type IntoIter = ZipValidity<&'a T, BinaryViewValueIter<'a, T>, BitmapIter<'a>>;

    fn into_iter(self) -> Self::IntoIter {
        self.iter()
    }
}

unsafe impl<'a, T: ViewType + ?Sized> ArrayAccessor<'a> for MutableBinaryViewArray<T> {
    type Item = &'a T;

    #[inline]
    unsafe fn value_unchecked(&'a self, index: usize) -> Self::Item {
        self.value_unchecked(index)
    }

    #[inline]
    fn len(&self) -> usize {
        self.views().len()
    }
}

/// Iterator of values of an [`MutableBinaryViewArray`].
pub type MutableBinaryViewValueIter<'a, T> = ArrayValuesIter<'a, MutableBinaryViewArray<T>>;