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Original file line number | Diff line number | Diff line change |
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use crate::transforms::chain::TransformChainBuilder; | ||
use crate::transforms::{TransformBuilder, TransformConfig}; | ||
use anyhow::Result; | ||
use serde::de::{DeserializeSeed, Deserializer, MapAccess, SeqAccess, Visitor}; | ||
use serde::Deserialize; | ||
use std::fmt::{self, Debug}; | ||
use std::iter; | ||
|
||
#[derive(Deserialize, Debug)] | ||
pub struct TransformChainConfig( | ||
#[serde(rename = "TransformChain", deserialize_with = "vec_transform_config")] | ||
pub Vec<Box<dyn TransformConfig>>, | ||
); | ||
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impl TransformChainConfig { | ||
pub async fn get_builder(&self, name: String) -> Result<TransformChainBuilder> { | ||
let mut transforms: Vec<Box<dyn TransformBuilder>> = Vec::new(); | ||
for tc in &self.0 { | ||
transforms.push(tc.get_builder(name.clone()).await?) | ||
} | ||
Ok(TransformChainBuilder::new(transforms, name)) | ||
} | ||
} | ||
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fn vec_transform_config<'de, D>(deserializer: D) -> Result<Vec<Box<dyn TransformConfig>>, D::Error> | ||
where | ||
D: Deserializer<'de>, | ||
{ | ||
struct VecTransformConfigVisitor; | ||
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impl<'de> Visitor<'de> for VecTransformConfigVisitor { | ||
type Value = Vec<Box<dyn TransformConfig>>; | ||
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | ||
formatter.write_str("list of TransformConfig") | ||
} | ||
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fn visit_seq<S>(self, mut seq: S) -> Result<Self::Value, S::Error> | ||
where | ||
S: SeqAccess<'de>, | ||
{ | ||
let mut vec = Vec::new(); | ||
while let Some(item) = seq.next_element_seed(TransformConfigVisitor)? { | ||
vec.push(item); | ||
} | ||
Ok(vec) | ||
} | ||
} | ||
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struct TransformConfigVisitor; | ||
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impl<'de> Visitor<'de> for TransformConfigVisitor { | ||
type Value = Box<dyn TransformConfig>; | ||
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | ||
formatter.write_str("TransformConfig") | ||
} | ||
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fn visit_map<M>(self, map: M) -> Result<Self::Value, M::Error> | ||
where | ||
M: MapAccess<'de>, | ||
{ | ||
let de = serde::de::value::MapAccessDeserializer::new(map); | ||
Deserialize::deserialize(de) | ||
} | ||
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fn visit_str<E>(self, string: &str) -> Result<Self::Value, E> | ||
where | ||
E: serde::de::Error, | ||
{ | ||
let singleton_map = iter::once((string, ())); | ||
let de = serde::de::value::MapDeserializer::new(singleton_map); | ||
Deserialize::deserialize(de) | ||
} | ||
} | ||
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impl<'de> DeserializeSeed<'de> for TransformConfigVisitor { | ||
type Value = Box<dyn TransformConfig>; | ||
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fn deserialize<D>(self, deserializer: D) -> Result<Self::Value, D::Error> | ||
where | ||
D: Deserializer<'de>, | ||
{ | ||
deserializer.deserialize_any(self) | ||
} | ||
} | ||
|
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deserializer.deserialize_seq(VecTransformConfigVisitor) | ||
} |
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