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
|
/*
* Copyright (C) 2015 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.android.statementservice.retriever;
/**
* A handle representing the identity and address of some digital asset. An asset is an online
* entity that typically provides some service or content. Examples of assets are websites, Android
* apps, Twitter feeds, and Plus Pages.
*
* <p> Asset can be represented by a JSON string. For example, the web site https://www.google.com
* can be represented by
* <pre>
* {"namespace": "web", "site": "https://www.google.com"}
* </pre>
*
* <p> The Android app with package name com.google.test that is signed by a certificate with sha256
* fingerprint 11:22:33 can be represented by
* <pre>
* {"namespace": "android_app",
* "package_name": "com.google.test",
* "sha256_cert_fingerprints": ["11:22:33"]}
* </pre>
*
* <p>Given a signed APK, Java 7's commandline keytool can compute the fingerprint using:
* {@code keytool -list -printcert -jarfile signed_app.apk}
*/
public abstract class AbstractAsset {
/**
* Returns a JSON string representation of this asset. The strings returned by this function are
* normalized -- they can be used for equality testing.
*/
public abstract String toJson();
/**
* Returns a key that can be used by {@link AbstractAssetMatcher} to lookup the asset.
*
* <p> An asset will match an {@code AssetMatcher} only if the value of this method is equal to
* {@code AssetMatcher.getMatchedLookupKey()}.
*/
public abstract int lookupKey();
/**
* Creates a new Asset from its JSON string representation.
*
* @throws AssociationServiceException if the assetJson is not well formatted.
*/
public static AbstractAsset create(String assetJson)
throws AssociationServiceException {
return AssetFactory.create(assetJson);
}
/**
* If this is the source asset of a statement file, should the retriever follow
* any insecure (non-HTTPS) include statements made by the asset.
*/
public abstract boolean followInsecureInclude();
}
|
