guava

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/*
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 * Copyright (C) 2008 The Guava Authors
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 * http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.google.common.collect.testing.features;
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import com.google.common.annotations.GwtCompatible;
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import com.google.common.collect.testing.Helpers;
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import java.util.Collections;
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import java.util.Set;
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import org.checkerframework.checker.nullness.qual.Nullable;
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/**
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 * Encapsulates the constraints that a class under test must satisfy in order for a tester method to
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 * be run against that class.
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 *
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 * @author George van den Driessche
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 */
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@GwtCompatible
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public final class TesterRequirements {
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  private final Set<Feature<?>> presentFeatures;
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  private final Set<Feature<?>> absentFeatures;
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  public TesterRequirements(Set<Feature<?>> presentFeatures, Set<Feature<?>> absentFeatures) {
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    this.presentFeatures = Helpers.copyToSet(presentFeatures);
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    this.absentFeatures = Helpers.copyToSet(absentFeatures);
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  }
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  public TesterRequirements(TesterRequirements tr) {
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    this(tr.getPresentFeatures(), tr.getAbsentFeatures());
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  }
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  public TesterRequirements() {
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    this(Collections.<Feature<?>>emptySet(), Collections.<Feature<?>>emptySet());
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  }
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  public final Set<Feature<?>> getPresentFeatures() {
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    return presentFeatures;
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  }
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  public final Set<Feature<?>> getAbsentFeatures() {
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    return absentFeatures;
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  }
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  @Override
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  public boolean equals(@Nullable Object object) {
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    if (object == this) {
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      return true;
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    }
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    if (object instanceof TesterRequirements) {
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      TesterRequirements that = (TesterRequirements) object;
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      return this.presentFeatures.equals(that.presentFeatures)
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          && this.absentFeatures.equals(that.absentFeatures);
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    }
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    return false;
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  }
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  @Override
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  public int hashCode() {
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    return presentFeatures.hashCode() * 31 + absentFeatures.hashCode();
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  }
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  @Override
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  public String toString() {
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    return "{TesterRequirements: present=" + presentFeatures + ", absent=" + absentFeatures + "}";
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  }
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  private static final long serialVersionUID = 0;
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}
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