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A web service test double for all occasions - standalone edition

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/*
 * Copyright (C) 2011-2023 Thomas Akehurst
 *
 * Licensed 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 com.github.tomakehurst.wiremock.stubbing;

import static com.google.common.collect.Iterables.removeIf;

import java.util.Comparator;
import java.util.Iterator;
import java.util.concurrent.ConcurrentSkipListSet;
import java.util.concurrent.atomic.AtomicLong;
import java.util.stream.Stream;

public class SortedConcurrentMappingSet implements Iterable {

  private final AtomicLong insertionCount;
  private final ConcurrentSkipListSet mappingSet;

  public SortedConcurrentMappingSet() {
    insertionCount = new AtomicLong();
    mappingSet = new ConcurrentSkipListSet<>(sortedByPriorityThenReverseInsertionOrder());
  }

  private Comparator sortedByPriorityThenReverseInsertionOrder() {
    return (one, two) -> {
      int priorityComparison = one.comparePriorityWith(two);
      if (priorityComparison != 0) {
        return priorityComparison;
      }

      return Long.compare(two.getInsertionIndex(), one.getInsertionIndex());
    };
  }

  @Override
  public Iterator iterator() {
    return mappingSet.iterator();
  }

  public Stream stream() {
    return mappingSet.stream();
  }

  public void add(StubMapping mapping) {
    mapping.setInsertionIndex(insertionCount.getAndIncrement());
    mappingSet.add(mapping);
  }

  public boolean remove(final StubMapping mappingToRemove) {
    boolean removedByUuid =
        removeIf(
            mappingSet,
            mapping ->
                mappingToRemove.getUuid() != null
                    && mapping.getUuid() != null
                    && mappingToRemove.getUuid().equals(mapping.getUuid()));

    boolean removedByRequestPattern =
        !removedByUuid
            && removeIf(
                mappingSet, mapping -> mappingToRemove.getRequest().equals(mapping.getRequest()));

    return removedByUuid || removedByRequestPattern;
  }

  public boolean replace(StubMapping existingStubMapping, StubMapping newStubMapping) {

    if (mappingSet.remove(existingStubMapping)) {
      mappingSet.add(newStubMapping);
      return true;
    }
    return false;
  }

  public void clear() {
    mappingSet.clear();
  }

  @Override
  public String toString() {
    return mappingSet.toString();
  }
}