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#[macro_use]
mod common;
pub mod metrics;
pub mod bucket;
use std::collections::{BTreeMap, HashMap};
use serde::ser::{Serialize, Serializer};
use serde_json::Value;
use ::error::EsError;
use ::json::serialize_map_kv;
use self::bucket::BucketAggregationResult;
use self::metrics::MetricsAggregationResult;
#[derive(Debug)]
pub enum Aggregation<'a> {
Metrics(metrics::MetricsAggregation<'a>),
Bucket(bucket::BucketAggregation<'a>, Option<Aggregations<'a>>)
}
impl<'a> Serialize for Aggregation<'a> {
fn serialize<S>(&self, serializer: &mut S) -> Result<(), S::Error>
where S: Serializer {
use self::Aggregation::*;
let mut state = try!(serializer.serialize_map(Some(match self {
&Metrics(_) => 1,
&Bucket(_, ref opt_aggs) => match opt_aggs {
&Some(_) => 2,
&None => 1
}
})));
match self {
&Metrics(ref metric_agg) => {
let agg_name = metric_agg.details();
try!(serialize_map_kv(serializer, &mut state, agg_name, metric_agg));
},
&Bucket(ref bucket_agg, ref opt_aggs) => {
let agg_name = bucket_agg.details();
try!(serialize_map_kv(serializer, &mut state, agg_name, bucket_agg));
match opt_aggs {
&Some(ref other_aggs) => {
try!(serialize_map_kv(serializer, &mut state, "aggregations", other_aggs));
}
&None => ()
}
}
}
serializer.serialize_map_end(state)
}
}
#[derive(Debug, Serialize)]
pub struct Aggregations<'a>(HashMap<&'a str, Aggregation<'a>>);
impl<'a> Aggregations<'a> {
pub fn new() -> Aggregations<'a> {
Aggregations(HashMap::new())
}
pub fn add<A: Into<Aggregation<'a>>>(&mut self, key: &'a str, val: A) {
self.0.insert(key, val.into());
}
}
impl<'b> From<Vec<(&'b str, Aggregation<'b>)>> for Aggregations<'b> {
fn from(from: Vec<(&'b str, Aggregation<'b>)>) -> Aggregations<'b> {
let mut aggs = Aggregations::new();
for (name, agg) in from {
aggs.add(name, agg);
}
aggs
}
}
impl <'a, A: Into<Aggregation<'a>>> From<(&'a str, A)> for Aggregations<'a> {
fn from(from: (&'a str, A)) -> Aggregations<'a> {
let mut aggs = Aggregations::new();
aggs.add(from.0, from.1.into());
aggs
}
}
#[derive(Debug)]
pub enum AggregationResult {
Metrics(MetricsAggregationResult),
Bucket(BucketAggregationResult)
}
#[derive(Debug)]
pub struct AggregationsResult(HashMap<String, AggregationResult>);
fn object_to_result(aggs: &Aggregations,
object: &BTreeMap<String, Value>) -> Result<AggregationsResult, EsError> {
use self::Aggregation::*;
let mut ar_map = HashMap::new();
for (&key, val) in aggs.0.iter() {
let owned_key = key.to_owned();
let json = match object.get(&owned_key) {
Some(json) => json,
None => return Err(EsError::EsError(format!("No key: {}", &owned_key)))
};
ar_map.insert(owned_key, match val {
&Metrics(ref ma) => {
AggregationResult::Metrics(try!(MetricsAggregationResult::from(ma, json)))
},
&Aggregation::Bucket(ref ba, ref aggs) => {
AggregationResult::Bucket(try!(BucketAggregationResult::from(ba,
json,
aggs)))
}
});
}
info!("Processed aggs - From: {:?}. To: {:?}", object, ar_map);
Ok(AggregationsResult(ar_map))
}
impl AggregationsResult {
pub fn get<'a>(&'a self, key: &str) -> Result<&'a AggregationResult, EsError> {
match self.0.get(key) {
Some(ref agg_res) => Ok(agg_res),
None => Err(EsError::EsError(format!("No agg for key: {}",
key)))
}
}
pub fn from(aggs: &Aggregations,
json: &Value) -> Result<AggregationsResult, EsError> {
let object = match json.as_object() {
Some(o) => o,
None => return Err(EsError::EsError("Aggregations is not an object".to_owned()))
};
object_to_result(aggs, object)
}
}