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<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Hi R¨¦mi,</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
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<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Yes, this was something I was hoping to get into the preview, but I wasn't sure where that conversion should
end up.</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">There are a few different places where it might go:</span></div>
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</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Gatherer.of(Collector)</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Gatherers.collect(Collector)</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Collector.asGatherer()</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">Collectors.gather(Collector)</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
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<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">I wasn't really convinced where it should go, and I was hesitant to making any changes to existing public interfaces
as a "nice to have", so I opted to leave it out for now.</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
</span></div>
<div><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">I think people would prefer to see it on Collector as a default method, but as I said before, making changes
to Collector wasn't something I was ready to prioritize for the (first) JEP.</span></div>
<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
</span></div>
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Cheers,<br>
¡Ì</div>
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<br>
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<b><br>
</b></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<b>Viktor Klang</b></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
Software Architect, Java Platform Group<br>
Oracle</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> core-libs-dev <core-libs-dev-retn@openjdk.org> on behalf of Remi Forax <forax@univ-mlv.fr><br>
<b>Sent:</b> Wednesday, 17 January 2024 17:08<br>
<b>To:</b> core-libs-dev <core-libs-dev@openjdk.java.net><br>
<b>Subject:</b> Seing a Collector as a Gatherer</font>
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<div class="PlainText">Hello,<br>
I may have overlook that, but it seems there is no method to see a Collector as a Gatherer.<br>
<br>
A Gatherer is more general than a Collector and a Gatherer with a greedy integrator that does not call Downstream.push in the intergator and only once is the finisher is basicaly a Collector.<br>
<br>
In code:<br>
<E, A, T> Gatherer<E, A, T> asGatherer(Collector<? super E, A, ? extends T> collector) {<br>
var supplier = collector.supplier();<br>
var accumulator = collector.accumulator();<br>
var combiner = collector.combiner();<br>
var finisher = collector.finisher();<br>
return Gatherer.of(supplier,<br>
Gatherer.Integrator.ofGreedy((state, element, _) -> {<br>
accumulator.accept(state, element);<br>
return true;<br>
}),<br>
combiner,<br>
(state, downstream) -> downstream.push(finisher.apply(state)));<br>
}<br>
<br>
This is eaxctly how Gatherer.fold() works.<br>
<br>
Is there a reason why such method does not exist ?<br>
<br>
regards,<br>
R¨¦mi<br>
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