content: /*
   * 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.calcite.plan.visualizer;
  
  import com.google.common.collect.ImmutableList;
  import com.google.common.collect.ImmutableMap;
  
  import java.util.List;
  import java.util.Map;
  
  /**
   * A step in the visualizer represents one rule call of the planner.
   */
  class StepInfo {
    private final String id;
    private final Map<String, Object> updates;
    private final List<String> matchedRels;
  
    StepInfo(final String id,
        final Map<String, Object> updates,
        final List<String> matchedRels) {
      this.id = id;
      this.updates = ImmutableMap.copyOf(updates);
      this.matchedRels = ImmutableList.copyOf(matchedRels);
    }
  
    public String getId() {
      return id;
    }
  
    public Map<String, Object> getUpdates() {
      return updates;
    }
  
    public List<String> getMatchedRels() {
      return matchedRels;
    }
  }
  