blob: 55e8dde1087efd48086e3fa2c0bc0ca91dc6fe66 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/*
* Copyright (C) 2014 The Android Open Source Project
*
* 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.android.apps.common.testing.ui.espresso.matcher;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
import org.hamcrest.BaseMatcher;
/**
* Some matcher sugar that lets you create a matcher for a given type
* but only process items of a specific subtype of that matcher.
*
* @param <T> The desired type of the Matcher.
* @param <S> the subtype of T that your matcher applies safely to.
*/
public abstract class BoundedMatcher<T, S extends T> extends BaseMatcher<T> {
private final Class<?> expectedType;
private final Class<?>[] interfaceTypes;
public BoundedMatcher(Class<? extends S> expectedType) {
this.expectedType = checkNotNull(expectedType);
this.interfaceTypes = new Class[0];
}
public BoundedMatcher(Class<?> expectedType, Class<?> interfaceType1,
Class<?>... otherInterfaces) {
this.expectedType = checkNotNull(expectedType);
checkNotNull(otherInterfaces);
int interfaceCount = otherInterfaces.length + 1;
this.interfaceTypes = new Class[interfaceCount];
interfaceTypes[0] = checkNotNull(interfaceType1);
checkArgument(interfaceType1.isInterface());
int interfaceTypeIdx = 1;
for (Class<?> intfType : otherInterfaces) {
interfaceTypes[interfaceTypeIdx] = checkNotNull(intfType);
checkArgument(intfType.isInterface());
interfaceTypeIdx++;
}
}
protected abstract boolean matchesSafely(S item);
@Override
@SuppressWarnings({"unchecked"})
public final boolean matches(Object item) {
if (item == null) {
return false;
}
if (expectedType.isInstance(item)) {
for (Class<?> intfType : interfaceTypes) {
if (!intfType.isInstance(item)) {
return false;
}
}
return matchesSafely((S) item);
}
return false;
}
}
|
