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A web service test double for all occasions
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/*
 * Copyright (C) 2016-2022 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.matching;

import static java.util.Collections.min;
import static java.util.Collections.singletonList;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonValue;
import com.github.tomakehurst.wiremock.client.WireMock;
import com.github.tomakehurst.wiremock.http.MultiValue;
import com.google.common.base.Function;
import com.google.common.base.Objects;
import com.google.common.collect.Lists;
import java.util.Comparator;
import java.util.List;

public class MultiValuePattern implements NamedValueMatcher {

  private final StringValuePattern valuePattern;

  public MultiValuePattern(StringValuePattern valuePattern) {
    this.valuePattern = valuePattern;
  }

  @JsonCreator
  public static MultiValuePattern of(StringValuePattern valuePattern) {
    return new MultiValuePattern(valuePattern);
  }

  public static MultiValuePattern absent() {
    return new MultiValuePattern(WireMock.absent());
  }

  @Override
  public MatchResult match(MultiValue multiValue) {
    List values = multiValue.isPresent() ? multiValue.values() : singletonList(null);
    return getBestMatch(valuePattern, values);
  }

  @JsonValue
  public StringValuePattern getValuePattern() {
    return valuePattern;
  }

  @Override
  public String getName() {
    return valuePattern.getName();
  }

  @Override
  public String getExpected() {
    return valuePattern.getExpected();
  }

  private static MatchResult getBestMatch(
      final StringValuePattern valuePattern, List values) {
    List allResults =
        Lists.transform(
            values,
            new Function() {
              public MatchResult apply(String input) {
                return valuePattern.match(input);
              }
            });

    return min(
        allResults,
        new Comparator() {
          public int compare(MatchResult o1, MatchResult o2) {
            return Double.compare(o1.getDistance(), o2.getDistance());
          }
        });
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;
    MultiValuePattern that = (MultiValuePattern) o;
    return Objects.equal(valuePattern, that.valuePattern);
  }

  @Override
  public int hashCode() {
    return Objects.hashCode(valuePattern);
  }
}