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Switch from Guava Optionals to Java 8 Optionals

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This was a surprisingly involved change. Some of the difficulties included
java.util.Optional purposely not being Serializable (so I had to move a
few Optionals in mapreduce classes to @Nullable) and having to add the Truth
Java8 extension library for assertion support.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=171863777
This commit is contained in:
mcilwain 2017-10-11 13:09:26 -07:00 • committed by jianglai
parent 184b2b56ac
commit c0f8da0c6e
581 changed files with 1325 additions and 932 deletions
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10
java/google/registry/model/billing/RegistrarCreditBalance.java
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@ -20,7 +20,6 @@ import static com.google.common.base.Preconditions.checkState;
import static google.registry.model.ofy.ObjectifyService.ofy;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Optional;
import com.google.common.collect.ForwardingNavigableMap;
import com.google.common.collect.ImmutableSortedMap;
import com.google.common.collect.Maps;
@ -34,6 +33,7 @@ import google.registry.model.ImmutableObject;
import google.registry.model.annotations.ReportedOn;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import org.joda.money.CurrencyUnit;
import org.joda.money.Money;
import org.joda.time.DateTime;
@ -171,8 +171,8 @@ public final class RegistrarCreditBalance extends ImmutableObject implements Bui
ofy().load().type(RegistrarCreditBalance.class).ancestor(registrarCredit)) {
// Create the submap at this key if it doesn't exist already.
Map<DateTime, Money> submap =
Optional.fromNullable(map.get(balance.effectiveTime))
.or(new HashMap<DateTime, Money>());
Optional.ofNullable(map.get(balance.effectiveTime))
.orElse(new HashMap<DateTime, Money>());
submap.put(balance.writtenTime, balance.amount);
map.put(balance.effectiveTime, submap);
}
@ -212,8 +212,8 @@ public final class RegistrarCreditBalance extends ImmutableObject implements Bui
private Optional<Money> getMostRecentlyWrittenBalance(
Map.Entry<DateTime, ImmutableSortedMap<DateTime, Money>> balancesAtEffectiveTime) {
return balancesAtEffectiveTime == null
? Optional.<Money>absent()
// Don't use Optional.fromNullable() here since it's an error if there's a empty submap.
? Optional.<Money>empty()
// Don't use Optional.ofNullable() here since it's an error if there's a empty submap.
: Optional.of(balancesAtEffectiveTime.getValue().lastEntry().getValue());
}