7091: JOverflow Instance View table should be sortable by clicking headers

[aptmac]

This PR addresses JMC-7091 [0], in which the tree viewer in the JOverflow instances tab does not allow the table to be sorted via the column headers. Currently the viewer column headers do not perform any action when clicked. Now a comparator have been added to the viewer which sorts based on the column header (String comparison for the Name & Value columns, Integer for the Size column).

Screenshot:

Gif:

[0] https://bugs.openjdk.java.net/browse/JMC-7091

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Progress

• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JMC-7091: JOverflow Instance View table should be sortable by clicking headers

Reviewers

• Marcus Hirt (@thegreystone - Reviewer)

Reviewing

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$ git fetch https://git.openjdk.java.net/jmc pull/322/head:pull/322
$ git checkout pull/322

Update a local copy of the PR:
$ git checkout pull/322
$ git pull https://git.openjdk.java.net/jmc pull/322/head

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Checkout this PR locally:
$ git pr checkout 322

View PR using the GUI difftool:
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Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jmc/pull/322.diff

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[mlbridge]

Webrevs

• 00: Full (67db8263)

[openjdk]

@aptmac This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

7091: JOverflow Instance View table should be sortable by clicking headers

Reviewed-by: hirt

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[aptmac]

/integrate

[openjdk]

Going to push as commit 5787b9a.

[openjdk]

@aptmac Pushed as commit 5787b9a.

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