|Represents an issue change history.
This class is deprecated.
since v6.2 This class is redundant, and not used by JIRA.
ChangeHistoryGroup together to try and reduce org.apache.lucene.document.Document proliferation.
|A simple holder for change items
In 4.4 the behaviour of this domain object was changed to add support for changes that can can have multi value states
for instance an affectedVersion could change from the state "4.4 4.4.1" -> "4.4 4.4.1 4.4.2"
To this end end extra methods are added getFroms(), getTos() that return a map of all the changes in a single change item
getFrom and getTo will return the first change in this list, this will not break behaviour for any of the supported
single value fields.
|jql clause names do not always map well to the value stored in the change item table - fore instance fixVersions is stored as FIX Version
Although SystemSearchConstants provides these values, it's a little overkill for what we need.