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Original file line number | Diff line number | Diff line change |
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@@ -1,52 +1,97 @@ | ||
use crate::{ | ||
empty::Empty, | ||
event::Event, | ||
key::{Key, ToKey}, | ||
props::{ControlFlow, Props}, | ||
time::{Clock, Timer, Timestamp}, | ||
value::{ToValue, Value}, | ||
well_known::{TIMESTAMP_KEY, TIMESTAMP_START_KEY}, | ||
}; | ||
use core::ops::Range; | ||
|
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pub trait Extent { | ||
fn extent(&self) -> Option<Range<Timestamp>>; | ||
#[derive(Debug, Clone)] | ||
pub struct Extent(Option<Range<Timestamp>>); | ||
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impl Extent { | ||
pub fn point(ts: Timestamp) -> Self { | ||
Extent(Some(ts..ts)) | ||
} | ||
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pub fn span(ts: Range<Timestamp>) -> Self { | ||
Extent(Some(ts)) | ||
} | ||
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pub fn empty() -> Self { | ||
Extent(None) | ||
} | ||
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pub fn to_point(&self) -> Option<&Timestamp> { | ||
self.0.as_ref().map(|ts| &ts.end) | ||
} | ||
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pub fn to_span(&self) -> Option<&Range<Timestamp>> { | ||
self.0.as_ref().filter(|ts| ts.start != ts.end) | ||
} | ||
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pub fn is_empty(&self) -> bool { | ||
self.0.is_none() | ||
} | ||
} | ||
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impl<'a, T: Extent + ?Sized> Extent for &'a T { | ||
fn extent(&self) -> Option<Range<Timestamp>> { | ||
(**self).extent() | ||
impl Props for Extent { | ||
fn for_each<'kv, F: FnMut(Key<'kv>, Value<'kv>) -> ControlFlow>( | ||
&'kv self, | ||
mut for_each: F, | ||
) -> ControlFlow { | ||
if let Some(ref ts) = self.0 { | ||
if ts.start != ts.end { | ||
for_each(TIMESTAMP_START_KEY.to_key(), ts.start.to_value())?; | ||
} | ||
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for_each(TIMESTAMP_KEY.to_key(), ts.end.to_value()) | ||
} else { | ||
ControlFlow::Continue(()) | ||
} | ||
} | ||
} | ||
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impl Extent for Empty { | ||
fn extent(&self) -> Option<Range<Timestamp>> { | ||
None | ||
pub trait ToExtent { | ||
fn to_extent(&self) -> Extent; | ||
} | ||
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impl<'a, T: ToExtent + ?Sized> ToExtent for &'a T { | ||
fn to_extent(&self) -> Extent { | ||
(**self).to_extent() | ||
} | ||
} | ||
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impl<'a, P> Extent for Event<'a, P> { | ||
fn extent(&self) -> Option<Range<Timestamp>> { | ||
self.extent().cloned() | ||
impl ToExtent for Empty { | ||
fn to_extent(&self) -> Extent { | ||
Extent::empty() | ||
} | ||
} | ||
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impl Extent for Timestamp { | ||
fn extent(&self) -> Option<Range<Timestamp>> { | ||
Some(*self..*self) | ||
impl<T: ToExtent> ToExtent for Option<T> { | ||
fn to_extent(&self) -> Extent { | ||
self.as_ref() | ||
.map(|ts| ts.to_extent()) | ||
.unwrap_or_else(Extent::empty) | ||
} | ||
} | ||
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impl Extent for Range<Timestamp> { | ||
fn extent(&self) -> Option<Range<Timestamp>> { | ||
Some(self.clone()) | ||
impl ToExtent for Timestamp { | ||
fn to_extent(&self) -> Extent { | ||
Extent::point(*self) | ||
} | ||
} | ||
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impl<C: Clock> Extent for Timer<C> { | ||
fn extent(&self) -> Option<Range<Timestamp>> { | ||
self.extent() | ||
impl ToExtent for Range<Timestamp> { | ||
fn to_extent(&self) -> Extent { | ||
Extent::span(self.clone()) | ||
} | ||
} | ||
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impl<T: Extent> Extent for Option<T> { | ||
fn extent(&self) -> Option<Range<Timestamp>> { | ||
self.as_ref().and_then(|ts| ts.extent()) | ||
impl<C: Clock> ToExtent for Timer<C> { | ||
fn to_extent(&self) -> Extent { | ||
self.extent() | ||
} | ||
} |
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