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/*
 * Copyright (C) 2006 Google Inc.
 *
 * 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 shaded.shaded.com.google.inject.matcher;

import java.io.Serializable;

/**
 * Implements {@code and()} and {@code or()}.
 *
 * @author [email protected] (Bob Lee)
 */
public abstract class AbstractMatcher implements Matcher {

  @Override
  public Matcher and(final Matcher other) {
    return new AndMatcher(this, other);
  }

  @Override
  public Matcher or(Matcher other) {
    return new OrMatcher(this, other);
  }

  private static class AndMatcher extends AbstractMatcher implements Serializable {
    private final Matcher a, b;

    public AndMatcher(Matcher a, Matcher b) {
      this.a = a;
      this.b = b;
    }

    @Override
    public boolean matches(T t) {
      return a.matches(t) && b.matches(t);
    }

    @Override
    public boolean equals(Object other) {
      return other instanceof AndMatcher
          && ((AndMatcher) other).a.equals(a)
          && ((AndMatcher) other).b.equals(b);
    }

    @Override
    public int hashCode() {
      return 41 * (a.hashCode() ^ b.hashCode());
    }

    @Override
    public String toString() {
      return "and(" + a + ", " + b + ")";
    }

    private static final long serialVersionUID = 0;
  }

  private static class OrMatcher extends AbstractMatcher implements Serializable {
    private final Matcher a, b;

    public OrMatcher(Matcher a, Matcher b) {
      this.a = a;
      this.b = b;
    }

    @Override
    public boolean matches(T t) {
      return a.matches(t) || b.matches(t);
    }

    @Override
    public boolean equals(Object other) {
      return other instanceof OrMatcher
          && ((OrMatcher) other).a.equals(a)
          && ((OrMatcher) other).b.equals(b);
    }

    @Override
    public int hashCode() {
      return 37 * (a.hashCode() ^ b.hashCode());
    }

    @Override
    public String toString() {
      return "or(" + a + ", " + b + ")";
    }

    private static final long serialVersionUID = 0;
  }
}