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/*
 * 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.solr.search.facet;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.apache.solr.common.util.SimpleOrderedMap;

public class FacetDebugInfo {
  String processor;
  long elapse = -1;
  String filter;
  Map info; // additional information
  final List children;

  Map reqDescription;

  public FacetDebugInfo() {
    children = new ArrayList<>();
    info = new LinkedHashMap<>();
  }

  public void addChild(FacetDebugInfo child) {
    children.add(child);
  }

  public void setProcessor(String processor) {
    this.processor = processor;
  }

  public void setElapse(long elapse) {
    this.elapse = elapse;
  }

  public void setReqDescription(Map reqDescription) {
    this.reqDescription = reqDescription;
  }

  public void setFilter(String filter) {
    this.filter = filter;
  }

  public void putInfoItem(String key, Object value) {
    info.put(key, value);
  }

  public Map getInfo() {
    return info;
  }

  public SimpleOrderedMap getFacetDebugInfo() {
    SimpleOrderedMap info = new SimpleOrderedMap<>();

    if (filter != null) info.add("filter", filter);
    if (processor != null) info.add("processor", processor);
    if (elapse != -1) info.add("elapse", elapse);
    if (reqDescription != null) {
      info.addAll(reqDescription);
    }
    info.addAll(this.info);

    if (children != null && children.size() > 0) {
      List subfacet = new ArrayList<>();
      info.add("sub-facet", subfacet);
      for (FacetDebugInfo child : children) {
        subfacet.add(child.getFacetDebugInfo());
      }
    }
    return info;
  }

  @Override
  public String toString() {
    return "facet debug info: processor " + processor + " elapse " + elapse + "ms";
  }
}