Github user dawidwys commented on a diff in the pull request:
https://github.com/apache/flink/pull/4153#discussion_r125005277
--- Diff:
flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/pattern/Pattern.java
---
@@ -430,6 +431,54 @@ public Quantifier getQuantifier() {
return this;
}
+ /**
+ * Starts a new pattern sequence. The provided pattern is the initial
pattern
+ * of the new sequence.
+ *
+ * @param group the pattern to begin with
+ * @return the first pattern of a pattern sequence
+ */
+ public static <T, F extends T> GroupPattern<T, F> begin(Pattern<T, F>
group) {
+ return new GroupPattern<>(null, group);
+ }
+
+ /**
+ * Appends a new pattern to the existing one. The new pattern enforces
non-strict
--- End diff --
I would update the docs, to put more stress that this method is used for
appending a group pattern.
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