Coverage Summary for Class: AbstractGraph (com.google.common.graph)

1 /*
2  * Copyright (C) 2016 The Guava Authors
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.google.common.graph;
18 
19 import com.google.common.annotations.Beta;
20 import javax.annotation.CheckForNull;
21 
22 /**
23  * This class provides a skeletal implementation of {@link Graph}. It is recommended to extend this
24  * class rather than implement {@link Graph} directly.
25  *
26  * @author James Sexton
27  * @param <N> Node parameter type
28  * @since 20.0
29  */
30 @Beta
31 @ElementTypesAreNonnullByDefault
32 public abstract class AbstractGraph<N> extends AbstractBaseGraph<N> implements Graph<N> {
33 
34   @Override
35   public final boolean equals(@CheckForNull Object obj) {
36     if (obj == this) {
37       return true;
38     }
39     if (!(obj instanceof Graph)) {
40       return false;
41     }
42     Graph<?> other = (Graph<?>) obj;
43 
44     return isDirected() == other.isDirected()
45         && nodes().equals(other.nodes())
46         && edges().equals(other.edges());
47   }
48 
49   @Override
50   public final int hashCode() {
51     return edges().hashCode();
52   }
53 
54   /** Returns a string representation of this graph. */
55   @Override
56   public String toString() {
57     return "isDirected: "
58         + isDirected()
59         + ", allowsSelfLoops: "
60         + allowsSelfLoops()
61         + ", nodes: "
62         + nodes()
63         + ", edges: "
64         + edges();
65   }
66 }