/*
    * Copyright (C) 2011 The Guava Authors
    *
    * 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.google.common.collect;
  
  import javax.annotation.Nullable;
  
  /**
   * A skeletal implementation of {@code RangeSet}.
   *
   * @author Louis Wasserman
   */
  abstract class AbstractRangeSet<C extends Comparable> implements RangeSet<C> {
    AbstractRangeSet() {}
  
    @Override
    public boolean contains(C value) {
      return rangeContaining(value) != null;
    }
  
    @Override
    public abstract Range<C> rangeContaining(C value);
  
    @Override
    public boolean isEmpty() {
      return asRanges().isEmpty();
    }
  
    @Override
    public void add(Range<C> range) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public void remove(Range<C> range) {
      throw new UnsupportedOperationException();
    }
    
    @Override
    public void clear() {
      remove(Range.<C>all());
    }
  
    @Override
    public boolean enclosesAll(RangeSet<C> other) {
      for (Range<C> range : other.asRanges()) {
        if (!encloses(range)) {
          return false;
        }
      }
      return true;
    }
  
    @Override
    public void addAll(RangeSet<C> other) {
      for (Range<C> range : other.asRanges()) {
        add(range);
      }
    }
  
    @Override
    public void removeAll(RangeSet<C> other) {
      for (Range<C> range : other.asRanges()) {
        remove(range);
      }
    }
  
    @Override
    public abstract boolean encloses(Range<C> otherRange);
  
    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj == this) {
        return true;
      } else if (obj instanceof RangeSet) {
        RangeSet<?> other = (RangeSet<?>) obj;
        return this.asRanges().equals(other.asRanges());
      }
      return false;
    }
  
    @Override
    public final int hashCode() {
      return asRanges().hashCode();
    }
  
    @Override
    public final String toString() {
     return asRanges().toString();
   }
 }