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// Generated from definition io.k8s.api.autoscaling.v2beta2.MetricIdentifier

/// MetricIdentifier defines the name and optionally selector for a metric
#[derive(Clone, Debug, Default, PartialEq)]
pub struct MetricIdentifier {
    /// name is the name of the given metric
    pub name: String,

    /// selector is the string-encoded form of a standard kubernetes label selector for the given metric When set, it is passed as an additional parameter to the metrics server for more specific metrics scoping. When unset, just the metricName will be used to gather metrics.
    pub selector: Option<crate::apimachinery::pkg::apis::meta::v1::LabelSelector>,
}

impl<'de> serde::Deserialize<'de> for MetricIdentifier {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: serde::Deserializer<'de> {
        #[allow(non_camel_case_types)]
        enum Field {
            Key_name,
            Key_selector,
            Other,
        }

        impl<'de> serde::Deserialize<'de> for Field {
            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: serde::Deserializer<'de> {
                struct Visitor;

                impl<'de> serde::de::Visitor<'de> for Visitor {
                    type Value = Field;

                    fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        f.write_str("field identifier")
                    }

                    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> where E: serde::de::Error {
                        Ok(match v {
                            "name" => Field::Key_name,
                            "selector" => Field::Key_selector,
                            _ => Field::Other,
                        })
                    }
                }

                deserializer.deserialize_identifier(Visitor)
            }
        }

        struct Visitor;

        impl<'de> serde::de::Visitor<'de> for Visitor {
            type Value = MetricIdentifier;

            fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                f.write_str("MetricIdentifier")
            }

            fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> where A: serde::de::MapAccess<'de> {
                let mut value_name: Option<String> = None;
                let mut value_selector: Option<crate::apimachinery::pkg::apis::meta::v1::LabelSelector> = None;

                while let Some(key) = serde::de::MapAccess::next_key::<Field>(&mut map)? {
                    match key {
                        Field::Key_name => value_name = Some(serde::de::MapAccess::next_value(&mut map)?),
                        Field::Key_selector => value_selector = serde::de::MapAccess::next_value(&mut map)?,
                        Field::Other => { let _: serde::de::IgnoredAny = serde::de::MapAccess::next_value(&mut map)?; },
                    }
                }

                Ok(MetricIdentifier {
                    name: value_name.ok_or_else(|| serde::de::Error::missing_field("name"))?,
                    selector: value_selector,
                })
            }
        }

        deserializer.deserialize_struct(
            "MetricIdentifier",
            &[
                "name",
                "selector",
            ],
            Visitor,
        )
    }
}

impl serde::Serialize for MetricIdentifier {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
        let mut state = serializer.serialize_struct(
            "MetricIdentifier",
            1 +
            self.selector.as_ref().map_or(0, |_| 1),
        )?;
        serde::ser::SerializeStruct::serialize_field(&mut state, "name", &self.name)?;
        if let Some(value) = &self.selector {
            serde::ser::SerializeStruct::serialize_field(&mut state, "selector", value)?;
        }
        serde::ser::SerializeStruct::end(state)
    }
}