HDFS-17486. Unify the logic of the dumpXattrs method

[YaAYadeer]

Description of PR

For more information about this PR, please refer to the following issue：
[HDFS-17486] (https://issues.apache.org/jira/browse/HDFS-17486)
VIO: dumpXattrs logic optimization

How was this patch tested?

The test class TestOfflineImageViewer already exists.TestOfflineImageViewer.testPBImageXmlWriter() method will call dumpXattrs when input parameter of dumpXattrs has xattrs.

For code changes:

• [√] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• [×] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• [×] If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 34s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+1 💚	mvninstall	55m 38s		trunk passed
+1 💚	compile	1m 37s		trunk passed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
+1 💚	compile	1m 29s		trunk passed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
+1 💚	checkstyle	1m 25s		trunk passed
+1 💚	mvnsite	1m 43s		trunk passed
+1 💚	javadoc	1m 20s		trunk passed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
+1 💚	javadoc	1m 58s		trunk passed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
+1 💚	spotbugs	4m 6s		trunk passed
+1 💚	shadedclient	49m 20s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
-1 ❌	mvninstall	1m 0s	/patch-mvninstall-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch failed.
-1 ❌	compile	1m 5s	/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1.txt	hadoop-hdfs in the patch failed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1.
-1 ❌	javac	1m 5s	/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1.txt	hadoop-hdfs in the patch failed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1.
-1 ❌	compile	0m 59s	/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06.txt	hadoop-hdfs in the patch failed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06.
-1 ❌	javac	0m 59s	/patch-compile-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06.txt	hadoop-hdfs in the patch failed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06.
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	1m 13s	/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs-project/hadoop-hdfs: The patch generated 2 new + 6 unchanged - 0 fixed = 8 total (was 6)
-1 ❌	mvnsite	1m 5s	/patch-mvnsite-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch failed.
+1 💚	javadoc	1m 2s		the patch passed with JDK Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
+1 💚	javadoc	1m 43s		the patch passed with JDK Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
-1 ❌	spotbugs	1m 0s	/patch-spotbugs-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch failed.
-1 ❌	shadedclient	18m 4s		patch has errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	0m 59s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch failed.
+1 💚	asflicense	0m 34s		The patch does not generate ASF License warnings.
		144m 16s

Subsystem	Report/Notes
Docker	ClientAPI=1.44 ServerAPI=1.44 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6797/1/artifact/out/Dockerfile
GITHUB PR	#6797
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 08974c36b16d 5.15.0-94-generic #104-Ubuntu SMP Tue Jan 9 15:25:40 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 93b3dd0
Default Java	Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_402-8u402-ga-2ubuntu1~20.04-b06
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6797/1/testReport/
Max. process+thread count	551 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6797/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
			_ Prechecks _
+1 💚	dupname	0m 01s		No case conflicting files found.
+0 🆗	spotbugs	0m 00s		spotbugs executables are not available.
+0 🆗	codespell	0m 00s		codespell was not available.
+0 🆗	detsecrets	0m 00s		detect-secrets was not available.
+1 💚	@author	0m 01s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 00s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+1 💚	mvninstall	89m 30s		trunk passed
+1 💚	compile	5m 53s		trunk passed
+1 💚	checkstyle	4m 37s		trunk passed
+1 💚	mvnsite	6m 43s		trunk passed
+1 💚	javadoc	6m 03s		trunk passed
+1 💚	shadedclient	151m 24s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	4m 39s		the patch passed
+1 💚	compile	3m 27s		the patch passed
+1 💚	javac	3m 27s		the patch passed
+1 💚	blanks	0m 01s		The patch has no blanks issues.
+1 💚	checkstyle	2m 27s		the patch passed
+1 💚	mvnsite	4m 25s		the patch passed
+1 💚	javadoc	3m 32s		the patch passed
+1 💚	shadedclient	160m 50s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	5m 23s		The patch does not generate ASF License warnings.
		428m 18s

Subsystem	Report/Notes
GITHUB PR	#6797
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	MINGW64_NT-10.0-17763 5ae641b16f00 3.4.10-87d57229.x86_64 2024-02-14 20:17 UTC x86_64 Msys
Build tool	maven
Personality	/c/hadoop/dev-support/bin/hadoop.sh
git revision	trunk / 2f2b0c9
Default Java	Azul Systems, Inc.-1.8.0_332-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch-windows-10/job/PR-6797/2/testReport/
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch-windows-10/job/PR-6797/2/console
versions	git=2.45.0.windows.1
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.

[hiwangzhihui]

Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.

[YaAYadeer]

The test class TestOfflineImageViewer already exists.
TestOfflineImageViewer.testPBImageXmlWriter() method will call dumpXattrs when input parameter of dumpXattrs has xattrs.