1 files changed, 74 insertions, 0 deletions
diff --git a/runtime/src/main/java/org/onap/policy/clamp/clds/config/CldsUserJsonDecoder.java b/runtime/src/main/java/org/onap/policy/clamp/clds/config/CldsUserJsonDecoder.java
new file mode 100644
index 000000000..20d7143fb
--- /dev/null
+++ b/runtime/src/main/java/org/onap/policy/clamp/clds/config/CldsUserJsonDecoder.java
@@ -0,0 +1,74 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP CLAMP
+ * ================================================================================
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights
+ *                             reserved.
+ * ================================================================================
+ * Modifications Copyright (c) 2019 Samsung
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END============================================
+ * ===================================================================
+ *
+ */
+
+package org.onap.policy.clamp.clds.config;
+
+import com.google.gson.JsonParseException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import org.apache.commons.io.IOUtils;
+import org.onap.policy.clamp.authorization.CldsUser;
+import org.onap.policy.clamp.clds.exception.CldsUsersException;
+import org.onap.policy.clamp.clds.util.JsonUtils;
+
+public class CldsUserJsonDecoder {
+
+    private CldsUserJsonDecoder() {
+    }
+
+    /**
+     * This method decodes the JSON file provided to a CldsUser Array. The stream is
+     * closed after this call, this is not possible to reuse it.
+     *
+     * @param cldsUsersFile
+     *        The inputStream containing the users json file
+     * @return CldsUser[] Array containing a list of the user defined in the JSON
+     *         file
+     */
+    public static CldsUser[] decodeJson(InputStream cldsUsersFile) {
+        try {
+            return decodeJson(IOUtils.toString(cldsUsersFile, StandardCharsets.UTF_8.name()));
+        } catch (IOException e) {
+            throw new CldsUsersException("Exception occurred during the decoding of the clds-users.json", e);
+        }
+    }
+
+    /**
+     * This method decodes the JSON string to a CldsUser Array.
+     *
+     * @param cldsUsersString JSON string
+     * @return CldsUser[] Array containing a list of the user defined in the JSON
+     */
+    public static CldsUser[] decodeJson(String cldsUsersString) {
+        try {
+            // the ObjectMapper readValue method closes the stream no need to do
+            // it
+            return JsonUtils.GSON.fromJson(cldsUsersString, CldsUser[].class);
+        } catch (JsonParseException e) {
+            throw new CldsUsersException("Exception occurred during the decoding of the clds-users.json", e);
+        }
+    }
+}