Github user kl0u commented on a diff in the pull request: https://github.com/apache/flink/pull/3963#discussion_r118297586 --- Diff: flink-libraries/flink-cep-scala/src/main/scala/org/apache/flink/cep/scala/conditions/Context.scala --- @@ -0,0 +1,33 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.flink.cep.scala.conditions + +import java.io.Serializable + +/** + * The context used when evaluating the {@link IterativeCondition condition}. + */ +trait Context[T] extends Serializable { + /** + * @return An { @link Iterable} over the already accepted elements + * for a given pattern. Elements are iterated in the order they were + * inserted in the pattern. + * @param name The name of the pattern. + */ + def apply(name: String): Iterable[T] +} --- End diff -- Why having different method names between Java and Scala? In Java this method is called `getEventsForPattern()`. We could rename both to sth like `getEventsForState()` if you agree, but I would suggest that same methods should have the same name and also, specifically for this, writing `context(stateName)` does not really seem nice. If you agree I can change it and then merge.
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