1 files changed, 49 insertions, 0 deletions
diff --git a/packages/StatementService/src/com/android/statementservice/retriever/AssetMatcherFactory.java b/packages/StatementService/src/com/android/statementservice/retriever/AssetMatcherFactory.java
new file mode 100644
index 0000000..1a50757
--- /dev/null
+++ b/packages/StatementService/src/com/android/statementservice/retriever/AssetMatcherFactory.java
@@ -0,0 +1,49 @@
+/*
+ * 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;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+/**
+ * Factory to create asset matcher from JSON string.
+ */
+/* package private */ final class AssetMatcherFactory {
+
+    private static final String FIELD_NOT_STRING_FORMAT_STRING = "Expected %s to be string.";
+    private static final String NAMESPACE_NOT_SUPPORTED_STRING = "Namespace %s is not supported.";
+
+    public static AbstractAssetMatcher create(String query) throws AssociationServiceException,
+            JSONException {
+        JSONObject queryObject = new JSONObject(query);
+
+        String namespace = queryObject.optString(Utils.NAMESPACE_FIELD, null);
+        if (namespace == null) {
+            throw new AssociationServiceException(String.format(
+                    FIELD_NOT_STRING_FORMAT_STRING, Utils.NAMESPACE_FIELD));
+        }
+
+        if (namespace.equals(Utils.NAMESPACE_WEB)) {
+            return new WebAssetMatcher(WebAsset.create(queryObject));
+        } else if (namespace.equals(Utils.NAMESPACE_ANDROID_APP)) {
+            return new AndroidAppAssetMatcher(AndroidAppAsset.create(queryObject));
+        } else {
+            throw new AssociationServiceException(
+                    String.format(NAMESPACE_NOT_SUPPORTED_STRING, namespace));
+        }
+    }
+}