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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.

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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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4
java/google/registry/tools/MutatingCommand.java
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@@ -27,7 +27,6 @@ import static google.registry.util.DiffUtils.prettyPrintEntityDeepDiff;
import static java.util.stream.Collectors.joining;
import com.google.common.base.MoreObjects;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
@@ -40,6 +39,7 @@ import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import javax.annotation.Nullable;
@@ -104,7 +104,7 @@ public abstract class MutatingCommand extends ConfirmingCommand implements Remot
if (type == ChangeType.UPDATE) {
String diffText = prettyPrintEntityDeepDiff(
oldEntity.toDiffableFieldMap(), newEntity.toDiffableFieldMap());
changeText = Optional.fromNullable(emptyToNull(diffText)).or("[no changes]\n");
changeText = Optional.ofNullable(emptyToNull(diffText)).orElse("[no changes]\n");
} else {
changeText = MoreObjects.firstNonNull(oldEntity, newEntity) + "\n";
}