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https://issues.apache.org/jira/browse/COLLECTIONS-673?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gary Gregory resolved COLLECTIONS-673.
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Resolution: Fixed
Fix Version/s: 4.2
Thank you for your patch, please verify and close.
> ListUtils.partition potential integer overflow
> ----------------------------------------------
>
> Key: COLLECTIONS-673
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-673
> Project: Commons Collections
> Issue Type: Bug
> Components: List
> Affects Versions: 4.1
> Reporter: John Mark
> Priority: Major
> Fix For: 4.2
>
>
> When calling {{ListUtils.partition()}} with a large size and large list, it
> is possible that an integer overflow will occur in the {{size()}} method that
> causes incorrect behavior. This will occur when using a size that, when added
> to list.size() will be larger than {{Integer.MAX_VALUE}}
> Current version of Guava's {{Lists.partition()}} handle this correctly, so
> perhaps the code for {{ListUtils.partition()}} needs to be updated based on
> the latest Guava code.
> A simple illustration of this:
> {code}
> List<String> aList = Arrays.asList("1", "2", "3", "4", "5");
> List<List<String>> partitioned = ListUtils.partition(aList,
> Integer.MAX_VALUE);
> System.out.println("Number of partitions: " + partitioned.size());
> for(List<String> l : partitioned) {
> System.out.println(l);
> }
> {code}
> The above code works correctly when using Guava's {{Lists.partition()}}
> instead.
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