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 org.json.JSONException;
20import org.json.JSONObject;
21
22/**
23 * Factory to create asset matcher from JSON string.
24 */
25/* package private */ final class AssetMatcherFactory {
26
27    private static final String FIELD_NOT_STRING_FORMAT_STRING = "Expected %s to be string.";
28    private static final String NAMESPACE_NOT_SUPPORTED_STRING = "Namespace %s is not supported.";
29
30    public static AbstractAssetMatcher create(String query) throws AssociationServiceException,
31            JSONException {
32        JSONObject queryObject = new JSONObject(query);
33
34        String namespace = queryObject.optString(Utils.NAMESPACE_FIELD, null);
35        if (namespace == null) {
36            throw new AssociationServiceException(String.format(
37                    FIELD_NOT_STRING_FORMAT_STRING, Utils.NAMESPACE_FIELD));
38        }
39
40        if (namespace.equals(Utils.NAMESPACE_WEB)) {
41            return new WebAssetMatcher(WebAsset.create(queryObject));
42        } else if (namespace.equals(Utils.NAMESPACE_ANDROID_APP)) {
43            return new AndroidAppAssetMatcher(AndroidAppAsset.create(queryObject));
44        } else {
45            throw new AssociationServiceException(
46                    String.format(NAMESPACE_NOT_SUPPORTED_STRING, namespace));
47        }
48    }
49}
50