Initial TCA commit into DCAEGEN2

[dcaegen2/analytics/tca.git] / dcae-analytics-model / src / main / java / org / openecomp / dcae / apod / analytics / model / util / AnalyticsModelJsonUtils.java

diff --git a/dcae-analytics-model/src/main/java/org/openecomp/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java b/dcae-analytics-model/src/main/java/org/openecomp/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java
new file mode 100644 (file)
index 0000000..f6b9dc9
--- /dev/null
+++ b/dcae-analytics-model/src/main/java/org/openecomp/dcae/apod/analytics/model/util/AnalyticsModelJsonUtils.java
@@ -0,0 +1,104 @@
+/*
+ * ===============================LICENSE_START======================================
+ *  dcae-analytics
+ * ================================================================================
+ *    Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ *  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.openecomp.dcae.apod.analytics.model.util;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.base.Suppliers;
+import org.openecomp.dcae.apod.analytics.model.util.json.AnalyticsModelObjectMapperSupplier;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ *
+ * @author Rajiv Singla . Creation Date: 11/7/2016.
+ */
+public abstract class AnalyticsModelJsonUtils {
+
+    /**
+     * Object mapper to be used for all TCA Json Parsing
+     */
+    protected static final ObjectMapper ANALYTICS_MODEL_OBJECT_MAPPER =
+            Suppliers.memoize(new AnalyticsModelObjectMapperSupplier()).get();
+
+
+    /**
+     * Converts Input Stream to given type reference object
+     *
+     * @param inputStream input stream
+     * @param valueTypeRef type reference
+     * @param <T> type of type reference
+     *
+     * @return parsed json object
+     *
+     * @throws IOException IO Exception
+     */
+    public static <T> T readValue(InputStream inputStream, TypeReference<T> valueTypeRef) throws IOException {
+        return ANALYTICS_MODEL_OBJECT_MAPPER.readValue(inputStream, valueTypeRef);
+    }
+
+
+    /**
+     * Converts Input Stream to given target class object
+     *
+     * @param inputStream input stream
+     * @param targetClass target class type
+     * @param <T> type of class
+     *
+     * @return parsed json object
+     *
+     * @throws IOException IO Exception
+     */
+    public static <T> T readValue(InputStream inputStream, Class<T> targetClass) throws IOException {
+        return ANALYTICS_MODEL_OBJECT_MAPPER.readValue(inputStream, targetClass);
+    }
+
+
+    /**
+     * Converts given object to JSON string
+     *
+     * @param value object that needs to converted to json string
+     *
+     * @return json string
+     * @throws JsonProcessingException Json Processing exception
+     */
+    public static String writeValueAsString(Object value) throws JsonProcessingException {
+        return ANALYTICS_MODEL_OBJECT_MAPPER.writeValueAsString(value);
+    }
+
+
+    /**
+     *  Method to deserialize JSON content from given JSON content String.
+     *
+     * @param jsonString JSON String
+     * @param objectClass target object class
+     * @param <T> object class type
+     *
+     * @return converted Object from JSON String
+     *
+     * @throws IOException IO Exception
+     */
+    public static <T> T readValue(final String jsonString, final Class<T> objectClass) throws IOException {
+        return ANALYTICS_MODEL_OBJECT_MAPPER.readValue(jsonString, objectClass);
+    }
+}