1/*
2 * Copyright (C) 2011 The Guava Authors
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the
10 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
11 * express or implied. See the License for the specific language governing permissions and
12 * limitations under the License.
13 */
14
15package com.google.common.collect;
16
17import javax.annotation.Nullable;
18
19/**
20 * A skeletal implementation of {@code RangeSet}.
21 *
22 * @author Louis Wasserman
23 */
24abstract class AbstractRangeSet<C extends Comparable> implements RangeSet<C> {
25  AbstractRangeSet() {}
26
27  @Override
28  public boolean contains(C value) {
29    return rangeContaining(value) != null;
30  }
31
32  @Override
33  public abstract Range<C> rangeContaining(C value);
34
35  @Override
36  public boolean isEmpty() {
37    return asRanges().isEmpty();
38  }
39
40  @Override
41  public void add(Range<C> range) {
42    throw new UnsupportedOperationException();
43  }
44
45  @Override
46  public void remove(Range<C> range) {
47    throw new UnsupportedOperationException();
48  }
49
50  @Override
51  public void clear() {
52    remove(Range.<C>all());
53  }
54
55  @Override
56  public boolean enclosesAll(RangeSet<C> other) {
57    for (Range<C> range : other.asRanges()) {
58      if (!encloses(range)) {
59        return false;
60      }
61    }
62    return true;
63  }
64
65  @Override
66  public void addAll(RangeSet<C> other) {
67    for (Range<C> range : other.asRanges()) {
68      add(range);
69    }
70  }
71
72  @Override
73  public void removeAll(RangeSet<C> other) {
74    for (Range<C> range : other.asRanges()) {
75      remove(range);
76    }
77  }
78
79  @Override
80  public abstract boolean encloses(Range<C> otherRange);
81
82  @Override
83  public boolean equals(@Nullable Object obj) {
84    if (obj == this) {
85      return true;
86    } else if (obj instanceof RangeSet) {
87      RangeSet<?> other = (RangeSet<?>) obj;
88      return this.asRanges().equals(other.asRanges());
89    }
90    return false;
91  }
92
93  @Override
94  public final int hashCode() {
95    return asRanges().hashCode();
96  }
97
98  @Override
99  public final String toString() {
100    return asRanges().toString();
101  }
102}
103