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feat: Handle generation numbers in BlobId#{to,from}GsUtilUri #1929

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merged 3 commits into from
Apr 5, 2023
Merged

feat: Handle generation numbers in BlobId#{to,from}GsUtilUri #1929

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0a5cf6a
feat: Handle generation numbers in BlobId#{to,from}GsUtilUri
davidmandle Mar 7, 2023
ac97be6
Break gsutil URI argument resolution out to an argument per line.
davidmandle Apr 4, 2023
d9da675
Fix formatting.
davidmandle Apr 4, 2023
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20 changes: 13 additions & 7 deletions google-cloud-storage/src/main/java/com/google/cloud/storage/BlobId.java
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
import com.google.common.base.MoreObjects;
import java.io.Serializable;
import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
Expand All @@ -31,6 +32,7 @@
public final class BlobId implements Serializable {

private static final long serialVersionUID = 8201580858265557469L;
private static final Pattern gsUtilUriPattern = Pattern.compile("^gs://(.+?)/(.+?)(?:#(\\d+))?$");
private final String bucket;
private final String name;
private final Long generation;
Expand Down Expand Up @@ -58,7 +60,7 @@ public Long getGeneration() {

/** Returns this blob's Storage url which can be used with gsutil */
public String toGsUtilUri() {
return "gs://" + bucket + "/" + name;
return "gs://" + bucket + "/" + name + (generation == null ? "" : ("#" + generation));
}

@Override
Expand Down Expand Up @@ -117,14 +119,18 @@ public static BlobId of(String bucket, String name, Long generation) {
* @param gsUtilUri the Storage url to create the blob from
*/
public static BlobId fromGsUtilUri(String gsUtilUri) {
if (!Pattern.matches("gs://.*/.*", gsUtilUri)) {
Matcher m = gsUtilUriPattern.matcher(gsUtilUri);
if (!m.matches()) {
throw new IllegalArgumentException(
gsUtilUri + " is not a valid gsutil URI (i.e. \"gs://bucket/blob\")");
gsUtilUri
+ " is not a valid gsutil URI (i.e. \"gs://bucket/blob\" or \"gs://bucket/blob#generation\")");
}
int blobNameStartIndex = gsUtilUri.indexOf('/', 5);
String bucketName = gsUtilUri.substring(5, blobNameStartIndex);
String blobName = gsUtilUri.substring(blobNameStartIndex + 1);

return BlobId.of(bucketName, blobName);
String bucket = m.group(1);
String name = m.group(2);
String generationGroup = m.group(3);
Long generation = generationGroup == null ? null : Long.parseLong(generationGroup);

return BlobId.of(bucket, name, generation);
}
}
9 changes: 9 additions & 0 deletions google-cloud-storage/src/test/java/com/google/cloud/storage/BlobIdTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,15 @@ public void testToFromGsUtilUri() {
assertEquals("gs://bucket/path/to/blob", blobId.toGsUtilUri());
}

@Test
public void testToFromGsUtilUriWithGeneration() {
BlobId blobId = BlobId.fromGsUtilUri("gs://bucket/path/to/blob#1360887697105000");
assertEquals("bucket", blobId.getBucket());
assertEquals("path/to/blob", blobId.getName());
assertEquals(Long.valueOf(1360887697105000L), blobId.getGeneration());
assertEquals("gs://bucket/path/to/blob#1360887697105000", blobId.toGsUtilUri());
}

@Test
public void testEquals() {
compareBlobIds(BLOB, BlobId.of("b", "n"));
Expand Down