dawidwys commented on issue #7110: [FLINK-8159] [cep] Pattern(Flat)SelectFunctions should support RichFunction interface URL: https://github.com/apache/flink/pull/7110#issuecomment-441666754 Hi @dianfu, Just a few comments, before we are ready to go with this PR: 1. Let's deprecate `OrCondition`, `AndCondition`, `NotCondition` with a comment that they exist only for backwards compatibility and advice to use the rich versions. (Agreed, let's do this in a separate PR/issue: https://issues.apache.org/jira/browse/FLINK-10113) 2. Mark all the conditions in `conditions` package `@Internal` 3. I would be in favor of unifying the null handling in the new classes in a way that we do not allow nulls there. We can change the `getCondition` method in `Pattern` to return `BooleanConditions#trueFunction` if nothing was set. This will make the whole logic more explicit IMHO. Let's leave the old classes as they are, as we want to drop them anyway.
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