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use Data;
use dataflow::channels::pact::Pipeline;
use dataflow::{Stream, Scope};
use dataflow::operators::generic::binary::Binary;
pub trait Concat<G: Scope, D: Data> {
fn concat(&self, &Stream<G, D>) -> Stream<G, D>;
}
impl<G: Scope, D: Data> Concat<G, D> for Stream<G, D> {
fn concat(&self, other: &Stream<G, D>) -> Stream<G, D> {
self.binary_stream(other, Pipeline, Pipeline, "Concat", |input1, input2, output| {
input1.for_each(|time, data| { output.session(&time).give_content(data); });
input2.for_each(|time, data| { output.session(&time).give_content(data); });
})
}
}
pub trait Concatenate<G: Scope, D: Data> {
fn concatenate(&self, Vec<Stream<G, D>>) -> Stream<G, D>;
}
impl<G: Scope, D: Data> Concatenate<G, D> for G {
fn concatenate(&self, mut sources: Vec<Stream<G, D>>) -> Stream<G, D> {
if let Some(mut result) = sources.pop() {
while let Some(next) = sources.pop() {
result = result.concat(&next);
}
result
}
else {
panic!("must pass at least one stream to concatenate");
}
}
}