1/*
2 * Copyright 2012, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.base.reference;
33
34import com.google.common.collect.Ordering;
35import org.jf.dexlib2.iface.reference.MethodReference;
36import org.jf.util.CharSequenceUtils;
37import org.jf.util.CollectionUtils;
38
39import javax.annotation.Nonnull;
40import javax.annotation.Nullable;
41
42public abstract class BaseMethodReference implements MethodReference {
43    @Override
44    public int hashCode() {
45        int hashCode = getDefiningClass().hashCode();
46        hashCode = hashCode*31 + getName().hashCode();
47        hashCode = hashCode*31 + getReturnType().hashCode();
48        return hashCode*31 + getParameterTypes().hashCode();
49    }
50
51    @Override
52    public boolean equals(@Nullable Object o) {
53        if (o != null && o instanceof MethodReference) {
54            MethodReference other = (MethodReference)o;
55            return getDefiningClass().equals(other.getDefiningClass()) &&
56                   getName().equals(other.getName()) &&
57                   getReturnType().equals(other.getReturnType()) &&
58                   CharSequenceUtils.listEquals(getParameterTypes(), other.getParameterTypes());
59        }
60        return false;
61    }
62
63    @Override
64    public int compareTo(@Nonnull MethodReference o) {
65        int res = getDefiningClass().compareTo(o.getDefiningClass());
66        if (res != 0) return res;
67        res = getName().compareTo(o.getName());
68        if (res != 0) return res;
69        res = getReturnType().compareTo(o.getReturnType());
70        if (res != 0) return res;
71        return CollectionUtils.compareAsIterable(Ordering.usingToString(), getParameterTypes(), o.getParameterTypes());
72    }
73}
74