group-coordinator/src/test/java/org/apache/kafka/coordinator/group/NoOpPartitionAssignor.java

/*
 * 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.kafka.coordinator.group;

import org.apache.kafka.coordinator.group.assignor.GroupSpec;
import org.apache.kafka.coordinator.group.assignor.GroupAssignment;
import org.apache.kafka.coordinator.group.assignor.MemberAssignment;
import org.apache.kafka.coordinator.group.assignor.PartitionAssignor;
import org.apache.kafka.coordinator.group.assignor.SubscribedTopicDescriber;

import java.util.Map;
import java.util.stream.Collectors;

public class NoOpPartitionAssignor implements PartitionAssignor {
    static final String NAME = "no-op";

    @Override
    public String name() {
        return NAME;
    }

    @Override
    public GroupAssignment assign(GroupSpec groupSpec, SubscribedTopicDescriber subscribedTopicDescriber) {
        return new GroupAssignment(groupSpec.members().entrySet()
            .stream()
            .collect(Collectors.toMap(
                Map.Entry::getKey,
                entry -> new MemberAssignment(entry.getValue().assignedPartitions())
            )));
    }
}