1/*
2 * Copyright (C) 2015 The Android Open Source Project
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
17package com.android.statementservice.retriever;
18
19import java.util.HashSet;
20import java.util.Set;
21
22/**
23 * Match assets that have the same 'package_name' field and have at least one common certificate
24 * fingerprint in 'sha256_cert_fingerprints' field.
25 */
26/* package private */ final class AndroidAppAssetMatcher extends AbstractAssetMatcher {
27
28    private final AndroidAppAsset mQuery;
29
30    public AndroidAppAssetMatcher(AndroidAppAsset query) {
31        mQuery = query;
32    }
33
34    @Override
35    public boolean matches(AbstractAsset asset) {
36        if (asset instanceof AndroidAppAsset) {
37            AndroidAppAsset androidAppAsset = (AndroidAppAsset) asset;
38            if (!androidAppAsset.getPackageName().equals(mQuery.getPackageName())) {
39                return false;
40            }
41
42            Set<String> certs = new HashSet<String>(mQuery.getCertFingerprints());
43            for (String cert : androidAppAsset.getCertFingerprints()) {
44                if (certs.contains(cert)) {
45                    return true;
46                }
47            }
48        }
49        return false;
50    }
51
52    @Override
53    public int getMatchedLookupKey() {
54        return mQuery.lookupKey();
55    }
56}
57