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Make EppInput.getSingleExtension() return Optional, not @Nullable

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This makes it harder to use it incorrectly by accident.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=181795813
This commit is contained in:
mcilwain 2018-01-12 14:45:46 -08:00 • committed by Ben McIlwain
parent fbdb148540
commit 315e6d57bf
21 changed files with 290 additions and 239 deletions
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18
java/google/registry/model/eppinput/EppInput.java
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@ -151,15 +151,15 @@ public class EppInput extends ImmutableObject {
}
/** Get the extension based on type, or null. If there are multiple, it chooses the first. */
@Nullable
public <E extends CommandExtension> E getSingleExtension(Class<E> clazz) {
return getCommandWrapper()
.getExtensions()
.stream()
.filter(clazz::isInstance)
.map(clazz::cast)
.findFirst()
.orElse(null);
public <E extends CommandExtension> Optional<E> getSingleExtension(Class<E> clazz) {
return Optional.ofNullable(
getCommandWrapper()
.getExtensions()
.stream()
.filter(clazz::isInstance)
.map(clazz::cast)
.findFirst()
.orElse(null));
}
/** A tag that goes inside of an EPP {@literal <command>}. */