Add import command for data loader CLI

[inv-jishnu]

Description

In this PR I am adding data loader import command and command options for data import.

Related issues and/or PRs

Please review this PR once the below PRs is merged and latest changes from master are merged to this branch

• Add export command for data loader CLI #2617
• Add util classes for data loader CLI #2616

Changes made

I have added the import command options and import command as a CLI command for data import

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• Tests (unit, integration, etc.) have been added for the changes.
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

This is the third PR for data loader CLI.

Release notes

NA

[Copilot]

Pull Request Overview

This PR adds a new import command to the data loader CLI, including command options, implementation, and a basic unit test.

• Introduce ImportCommandOptions with various CLI flags for importing
• Implement ImportCommand to wire options into ImportManager and handle validation/logging
• Add ImportCommandTest to verify behavior when required inputs are missing

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
ImportCommandOptions.java	Defined new PicoCLI options for the import command
ImportCommand.java	Implemented import command logic, validation, and wiring to core import APIs
ImportCommandTest.java	Added a test for missing/invalid config and import file

Comments suppressed due to low confidence (2)

data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataimport/ImportCommand.java:148

• Typo in variable name scalarDbStorageManger (should be scalarDbStorageManager).

ScalarDbStorageManager scalarDbStorageManger =

data-loader/cli/src/test/java/com/scalar/db/dataloader/cli/command/dataimport/ImportCommandTest.java:50

• The test expects IllegalArgumentException, but the command may throw a ParameterException or other exception type. Update the assertion to expect the correct exception or add more precise error checking.

assertThrows(IllegalArgumentException.class, () -> importCommand.call());

[Copilot]

The short option '-h' typically maps to help; consider choosing a different short flag to avoid clashing with PicoCLI's default help option.

Suggested change

	names = {"--header", "-h"},
	names = {"--header", "-hdr"},

[Copilot]

parseControlFileFromPath only checks for null but not blank strings; an empty "" path will cause ObjectMapper to try reading a non-existent file. Consider using StringUtils.isBlank(controlFilePath).

Suggested change

	if (controlFilePath == null) {
	if (StringUtils.isBlank(controlFilePath)) {

[Copilot]

The splitLogMode flag is only used to set SINGLE_FILE mode; when true, you never set LogMode.SPLIT_BY_DATA_CHUNK. Add an else block to set the split-chunk mode.

Suggested change

	builder.logMode(LogMode.SINGLE_FILE);
	builder.logMode(LogMode.SINGLE_FILE);
	} else {
	builder.logMode(LogMode.SPLIT_BY_DATA_CHUNK);

[Copilot]

[nitpick] The command description was changed to start with a lowercase letter; for consistency with other commands, consider capitalizing the first word.

Suggested change

	@CommandLine.Command(name = "import", description = "import data into a ScalarDB table")
	@CommandLine.Command(name = "import", description = "Import data into a ScalarDB table")