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StorageV2ProtoUtils.java
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StorageV2ProtoUtils.java
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/*
* Copyright 2022 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.cloud.storage;
import static com.google.common.base.Preconditions.checkArgument;
import com.google.protobuf.InvalidProtocolBufferException;
import com.google.protobuf.MessageOrBuilder;
import com.google.protobuf.util.JsonFormat;
import com.google.protobuf.util.JsonFormat.Printer;
import com.google.storage.v2.ObjectAccessControl;
import com.google.storage.v2.ReadObjectRequest;
import java.util.function.Predicate;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.checker.nullness.qual.Nullable;
final class StorageV2ProtoUtils {
private static final String VALIDATION_TEMPLATE =
"offset >= 0 && limit >= 0 (%s >= 0 && %s >= 0)";
private static final Printer PROTO_PRINTER =
JsonFormat.printer().omittingInsignificantWhitespace().preservingProtoFieldNames();
private StorageV2ProtoUtils() {}
@NonNull
static ReadObjectRequest seekReadObjectRequest(
@NonNull ReadObjectRequest request, @Nullable Long offset, @Nullable Long limit) {
validate(offset, limit);
ReadObjectRequest req = request;
boolean setOffset = offset != null && (offset > 0 || offset != req.getReadOffset());
boolean setLimit = limit != null && (limit < Long.MAX_VALUE || limit != req.getReadLimit());
if (setOffset || setLimit) {
ReadObjectRequest.Builder b = req.toBuilder();
if (setOffset) {
b.setReadOffset(offset);
}
if (setLimit) {
b.setReadLimit(limit);
}
req = b.build();
}
return req;
}
private static void validate(@Nullable Long offset, @Nullable Long limit) {
boolean offsetNull = offset == null;
boolean limitNull = limit == null;
if (offsetNull && limitNull) {
return;
}
if (!offsetNull) {
checkArgument(0 <= offset, VALIDATION_TEMPLATE, offset, limit);
}
if (!limitNull) {
checkArgument(0 <= limit, VALIDATION_TEMPLATE, offset, limit);
}
}
@NonNull
static String fmtProto(@NonNull final MessageOrBuilder msg) {
try {
return PROTO_PRINTER.print(msg);
} catch (InvalidProtocolBufferException e) {
throw new RuntimeException(e);
}
}
/**
* When evaluating an {@link ObjectAccessControl} entity, look at both {@code entity} (generally
* project number format) and {@code entity_alt} (generally project id format).
*/
static Predicate<ObjectAccessControl> objectAclEntityOrAltEq(String s) {
return oAcl -> oAcl.getEntity().equals(s) || oAcl.getEntityAlt().equals(s);
}
}