pvary commented on code in PR #18198:
URL: https://github.com/apache/iceberg/pull/18198#discussion_r4063840850
##########
core/src/main/java/org/apache/iceberg/encryption/InputFilesDecryptor.java:
##########
@@ -18,51 +18,80 @@
*/
package org.apache.iceberg.encryption;
-import java.nio.ByteBuffer;
-import java.util.Collections;
+import java.util.Collection;
import java.util.Map;
-import java.util.stream.Stream;
import org.apache.iceberg.CombinedScanTask;
+import org.apache.iceberg.ContentFile;
+import org.apache.iceberg.DeleteFile;
import org.apache.iceberg.FileScanTask;
import org.apache.iceberg.io.FileIO;
import org.apache.iceberg.io.InputFile;
import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
import org.apache.iceberg.relocated.com.google.common.collect.Maps;
+/** Resolves the files referenced by scan tasks into readable, decrypted
{@link InputFile}s. */
public class InputFilesDecryptor {
- private final Map<String, InputFile> decryptedInputFiles;
+ private final Iterable<? extends ContentFile<?>> referencedFiles;
+ private final EncryptingFileIO encryptingIO;
+ private Map<String, InputFile> lazyInputFiles = null;
+ /**
+ * @deprecated since 1.12.0, will be removed in 1.13.0; use {@link
#fromTasks(Iterable,
+ * EncryptingFileIO)} instead.
+ */
+ @Deprecated
public InputFilesDecryptor(
CombinedScanTask combinedTask, FileIO io, EncryptionManager encryption) {
- Map<String, ByteBuffer> keyMetadata = Maps.newHashMap();
- combinedTask.files().stream()
- .flatMap(
- fileScanTask ->
- Stream.concat(Stream.of(fileScanTask.file()),
fileScanTask.deletes().stream()))
- .forEach(file -> keyMetadata.put(file.location(), file.keyMetadata()));
- Stream<EncryptedInputFile> encrypted =
- keyMetadata.entrySet().stream()
- .map(
- entry ->
- EncryptedFiles.encryptedInput(
- io.newInputFile(entry.getKey()), entry.getValue()));
+ this(
+ () -> referencedFiles(combinedTask.files()).iterator(),
+ EncryptingFileIO.combine(io, encryption));
+ }
+
+ public static InputFilesDecryptor fromTasks(
+ Iterable<FileScanTask> tasks, EncryptingFileIO encryptingIO) {
+ return new InputFilesDecryptor(() -> referencedFiles(tasks).iterator(),
encryptingIO);
+ }
+
+ private InputFilesDecryptor(
+ Iterable<? extends ContentFile<?>> files, EncryptingFileIO encryptingIO)
{
+ this.referencedFiles = files;
+ this.encryptingIO = encryptingIO;
+ }
+
+ private Map<String, InputFile> inputFiles() {
+ if (lazyInputFiles == null) {
+ this.lazyInputFiles = encryptingIO.bulkDecrypt(referencedFiles);
Review Comment:
Do we need to synchronize this?
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