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+/*-
+ * ============LICENSE_START=======================================================
+ * PROJECT
+ * ================================================================================
+ * Copyright (C) 2018 Nokia Networks 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.onap.dcae.common;
+
+import io.vavr.collection.List;
+import io.vavr.collection.Set;
+import io.vavr.control.Option;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.util.stream.StreamSupport;
+
+import static io.vavr.API.Set;
+
+/**
+ * This class is a wrapper for 2 most used entities of org.json lib: JSONArray and JSONObject and comprises utility
+ * methods for fast access of json structures without need to explicitly coerce between them. While using this, bear in
+ * mind it does not contain exception handling - it is assumed that when using, the parsed json structure is known.
+ *
+ * @author koblosz
+ */
+public class AnyNode {
+
+ private Object obj;
+
+ private AnyNode(Object object) {
+ this.obj = object;
+ }
+
+ public static AnyNode fromString(String content) {
+ return new AnyNode(new JSONObject(content));
+ }
+
+ /**
+ * Returns key set of underlying object. It is assumed that underlying object is of type org.json.JSONObject.
+ */
+ public Set<String> keys() {
+ return Set(asJsonObject().keySet().toArray(new String[]{}));
+ }
+
+ /**
+ * Returns value associated with specified key wrapped with AnyValue object. It is assumed that this is of type
+ * org.json.JSONObject.
+ */
+ public AnyNode get(String key) {
+ return new AnyNode(asJsonObject().get(key));
+ }
+
+ /**
+ * Returns string representation of this. If it happens to have null, the value is treated as
+ * org.json.JSONObject.NULL and "null" string is returned then.
+ */
+ public String toString() {
+ return this.obj.toString();
+ }
+
+ /**
+ * Returns optional of object under specified key, wrapped with AnyNode object.
+ * If underlying object is not of type org.json.JSONObject
+ * or underlying object has no given key
+ * or given key is null
+ * then Optional.empty will be returned.
+ */
+ public Option<AnyNode> getAsOption(String key) {
+ try {
+ AnyNode value = get(key);
+ if (value.toString().equals("null")) {
+ return Option.none();
+ }
+ return Option.some(value);
+ } catch (JSONException ex) {
+ return Option.none();
+ }
+ }
+
+ /**
+ * Converts underlying object to map representation with map values wrapped with AnyNode object. It is assumed that
+ * underlying object is of type org.json.JSONObject.
+ */
+ public List<AnyNode> toList() {
+ return List.ofAll(StreamSupport.stream(((JSONArray) this.obj).spliterator(), false).map(AnyNode::new));
+ }
+
+ /**
+ * Checks if specified key is present in this. It is assumed that this is of type JSONObject.
+ */
+ public boolean has(String key) {
+ return !getAsOption(key).isEmpty();
+ }
+
+ private JSONObject asJsonObject() {
+ return (JSONObject) this.obj;
+ }
+
+}