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https://issues.apache.org/jira/browse/HADOOP-1579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Izaak Rubin updated HADOOP-1579:
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Attachment: HADOOP-1579-v2.patch
I've made the changes suggested by James, making WhileMatchRowFilter a wrapper
on other filters. StopRowFilter has also been changed such that it no longer
remembers whether or not it has filtered a row (and needs to continue to do
so); instead, the prior functionality of StopRowFilter can be replicated by
wrapping the new StopRowFilter in a WhileMatchRowFilter.
Thanks again James. I haven't made the changes you suggested in your second
email yet, so expect another patch in the near future. For the time being,
however, this one is an improvement.
> [hbase] Add new WhileMatchRowFilter and StopRowFilter filters
> -------------------------------------------------------------
>
> Key: HADOOP-1579
> URL: https://issues.apache.org/jira/browse/HADOOP-1579
> Project: Hadoop
> Issue Type: New Feature
> Components: contrib/hbase
> Reporter: Izaak Rubin
> Priority: Minor
> Attachments: HADOOP-1579-v2.patch, HADOOP-1579.patch
>
>
> I've created two additional filters for HBase: WhileMatchRowFilter and
> StopRowFilter. WhileMatchRowFilter is an extension of RegExpRowFilter; it
> also filters rows based on whether they match a specified regex. However,
> unlike its parent, WhileMatchRowFilter filters everything after it's first
> filtered row - once a row fails to match regex or column specifications,
> filterAllRemaining() always returns true. This type of functionality will be
> useful when filtering for a set of adjacent rows that match a certain regex
> (as opposed to every row that matches that regex).
> StopRowFilter filters out every row greater than or equal to a specified
> rowKey (the stopRow). The filter assumes that the rowKeys it receives are in
> alphabetical order, so once a key greater than the stopRow is encountered
> filterAllRemaining() will return true. StopRowFilter will be useful for
> alphabetical filtering.
> Both filters come with JUnit tests, namely TestWhileMatchRowFilter and
> TestStopRowFilter.
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