Add JsonUtil and use it

Get rid of org.openecomp.core.utilities.json.JsonUtil

Change-Id: I1dff97931dd76dde80c383baca9ff9e28e23d8ad
Issue-ID: SDC-1606
Signed-off-by: talig <talig@amdocs.com>

3 files changed, 97 insertions, 28 deletions

diff --git a/workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/InternalEmptyObject.java b/workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/InternalEmptyObject.java
deleted file mode 100644
index efbd4400..00000000
--- a/workflow-designer-be/src/main/java/org/onap/sdc/workflow/api/types/activityspec/InternalEmptyObject.java
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * Copyright © 2016-2018 European Support Limited
- *
- * 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 org.onap.sdc.workflow.api.types.activityspec;
-
-import org.codehaus.jackson.annotate.JsonAutoDetect;
-
-/**
- * Object of this class can be used to create empty Response body like "{}".
- */
-@JsonAutoDetect
-public class InternalEmptyObject {
-
-}
diff --git a/workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ActivitySpecRepositoryImpl.java b/workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ActivitySpecRepositoryImpl.java
index 05f2031b..726e831c 100644
--- a/workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ActivitySpecRepositoryImpl.java
+++ b/workflow-designer-be/src/main/java/org/onap/sdc/workflow/persistence/impl/ActivitySpecRepositoryImpl.java
@@ -34,7 +34,7 @@ import org.onap.sdc.workflow.persistence.impl.types.ActivitySpecData;
 import org.onap.sdc.workflow.persistence.impl.types.ActivitySpecElementType;
 import org.onap.sdc.workflow.persistence.types.ActivitySpecEntity;
 import org.onap.sdc.workflow.services.ActivitySpecConstant;
-import org.openecomp.core.utilities.json.JsonUtil;
+import org.onap.sdc.workflow.services.utilities.JsonUtil;
 import org.openecomp.core.zusammen.api.ZusammenAdaptor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Repository;
diff --git a/workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/utilities/JsonUtil.java b/workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/utilities/JsonUtil.java
new file mode 100644
index 00000000..3e197a9f
--- /dev/null
+++ b/workflow-designer-be/src/main/java/org/onap/sdc/workflow/services/utilities/JsonUtil.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * 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 org.onap.sdc.workflow.services.utilities;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonIOException;
+import com.google.gson.JsonSyntaxException;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.StringReader;
+
+public class JsonUtil {
+
+    private static final Gson gson = new Gson();
+
+    private JsonUtil() {
+    }
+
+    /**
+     * Object 2 json string.
+     *
+     * @param obj the obj
+     * @return the string
+     */
+    public static String object2Json(Object obj) {
+        return sbObject2Json(obj).toString();
+
+    }
+
+    /**
+     * Sb object 2 json string builder.
+     *
+     * @param obj the obj
+     * @return the string builder
+     */
+    public static StringBuilder sbObject2Json(Object obj) {
+        return new StringBuilder(new GsonBuilder().setPrettyPrinting().create().toJson(obj));
+    }
+
+    /**
+     * Json 2 object t.
+     *
+     * @param <T>      the type parameter
+     * @param json     the json
+     * @param classOfT the class of t
+     * @return the t
+     */
+    public static <T> T json2Object(String json, Class<T> classOfT) {
+        T typ;
+        try {
+            try (Reader br = new StringReader(json)) {
+                typ = gson.fromJson(br, classOfT);
+            }
+        } catch (JsonIOException | JsonSyntaxException | IOException exception) {
+            throw new RuntimeException(exception);
+        }
+        return typ;
+    }
+
+    /**
+     * Json 2 object t.
+     *
+     * @param <T>      the type parameter
+     * @param is       the is
+     * @param classOfT the class of t
+     * @return the t
+     */
+    public static <T> T json2Object(InputStream is, Class<T> classOfT) {
+        T type;
+        try (Reader br = new BufferedReader(new InputStreamReader(is))) {
+            type = new Gson().fromJson(br, classOfT);
+        } catch (JsonIOException | JsonSyntaxException | IOException exception) {
+            throw new RuntimeException(exception);
+        }
+        return type;
+    }
+
+}