serde_arrow 0.14.0

Convert sequences of Rust objects to Arrow arrays and back again
Documentation 
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use marrow::{
    datatypes::TimeUnit,
    view::{PrimitiveView, TimeView},
};
use serde::de::Visitor;

use crate::internal::{
    chrono,
    error::{set_default, try_, Context, ContextSupport, Result},
    utils::array_view_ext::ViewAccess,
};

use super::random_access_deserializer::RandomAccessDeserializer;

pub struct DurationDeserializer<'a> {
    path: String,
    unit: TimeUnit,
    values: PrimitiveView<'a, i64>,
}

impl<'a> DurationDeserializer<'a> {
    pub fn new(path: String, view: TimeView<'a, i64>) -> Self {
        Self {
            path,
            unit: view.unit,
            values: PrimitiveView {
                validity: view.validity,
                values: view.values,
            },
        }
    }

    pub fn get_string_value(&self, idx: usize) -> Result<String> {
        let value = self.values.get_required(idx)?;
        Ok(chrono::format_arrow_duration_as_span(*value, self.unit))
    }
}

impl Context for DurationDeserializer<'_> {
    fn annotate(&self, annotations: &mut std::collections::BTreeMap<String, String>) {
        set_default(annotations, "field", &self.path);
        set_default(
            annotations,
            "data_type",
            format!("Duration({unit})", unit = self.unit),
        );
    }
}

impl<'de> RandomAccessDeserializer<'de> for DurationDeserializer<'de> {
    fn is_some(&self, idx: usize) -> Result<bool> {
        self.values.is_some(idx)
    }

    fn deserialize_any_some<V: Visitor<'de>>(&self, visitor: V, idx: usize) -> Result<V::Value> {
        self.deserialize_i64(visitor, idx)
    }

    fn deserialize_i64<V: Visitor<'de>>(&self, visitor: V, idx: usize) -> Result<V::Value> {
        try_(|| visitor.visit_i64(*self.values.get_required(idx)?)).ctx(self)
    }

    fn deserialize_str<V: Visitor<'de>>(&self, visitor: V, idx: usize) -> Result<V::Value> {
        try_(|| visitor.visit_str(self.get_string_value(idx)?.as_str())).ctx(self)
    }

    fn deserialize_string<V: Visitor<'de>>(&self, visitor: V, idx: usize) -> Result<V::Value> {
        try_(|| visitor.visit_string(self.get_string_value(idx)?)).ctx(self)
    }

    fn deserialize_bytes<V: Visitor<'de>>(&self, visitor: V, idx: usize) -> Result<V::Value> {
        try_(|| visitor.visit_bytes(self.get_string_value(idx)?.as_bytes())).ctx(self)
    }

    fn deserialize_byte_buf<V: Visitor<'de>>(&self, visitor: V, idx: usize) -> Result<V::Value> {
        try_(|| visitor.visit_byte_buf(self.get_string_value(idx)?.into_bytes())).ctx(self)
    }
}