Initial commit for AAI-UI(sparky-backend)

[aai/sparky-be.git] / src / main / java / org / openecomp / sparky / util / TreeWalker.java

diff --git a/src/main/java/org/openecomp/sparky/util/TreeWalker.java b/src/main/java/org/openecomp/sparky/util/TreeWalker.java
new file mode 100644 (file)
index 0000000..c9a804d
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+++ b/src/main/java/org/openecomp/sparky/util/TreeWalker.java
@@ -0,0 +1,137 @@
+/**
+ * ============LICENSE_START===================================================
+ * SPARKY (AAI UI service)
+ * ============================================================================
+ * Copyright © 2017 AT&T Intellectual Property.
+ * Copyright © 2017 Amdocs
+ * 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=====================================================
+ *
+ * ECOMP and OpenECOMP are trademarks
+ * and service marks of AT&T Intellectual Property.
+ */
+
+package org.openecomp.sparky.util;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.Lists;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * The Class TreeWalker.
+ */
+public class TreeWalker {
+
+  /**
+   * Convert json to node.
+   *
+   * @param json the json
+   * @return the json node
+   * @throws JsonProcessingException the json processing exception
+   * @throws IOException Signals that an I/O exception has occurred.
+   */
+  public JsonNode convertJsonToNode(String json) throws JsonProcessingException, IOException {
+    ObjectMapper mapper = new ObjectMapper();
+
+    if (json == null) {
+      return null;
+    }
+
+    return mapper.readTree(json);
+
+  }
+
+  /**
+   * Walk tree.
+   *
+   * @param paths the paths
+   * @param root the root
+   */
+  public void walkTree(List<String> paths, JsonNode root) {
+    walker(paths, null, root);
+  }
+
+  /**
+   * Walker.
+   *
+   * @param paths the paths
+   * @param nodename the nodename
+   * @param node the node
+   */
+  private void walker(List<String> paths, String nodename, JsonNode node) {
+
+    if (node == null) {
+      return;
+    }
+
+    /*
+     * if ( nodename != null ) { paths.add(nodename); }
+     */
+
+    // System.out.println("path: " + nameToPrint);
+    if (node.isObject()) {
+      Iterator<Map.Entry<String, JsonNode>> iterator = node.fields();
+
+      ArrayList<Map.Entry<String, JsonNode>> nodesList = Lists.newArrayList(iterator);
+      // System.out.println("Walk Tree - root:" + node + ", elements
+      // keys:" + nodesList);
+
+      if (nodesList.isEmpty()) {
+
+        if (nodename != null) {
+          paths.add(nodename);
+        }
+
+      } else {
+
+        for (Map.Entry<String, JsonNode> nodEntry : nodesList) {
+          String name = nodEntry.getKey();
+          JsonNode newNode = nodEntry.getValue();
+
+          if (newNode.isValueNode()) {
+            if (nodename == null) {
+              paths.add(name + "=" + newNode.asText());
+            } else {
+              paths.add(nodename + "." + name + "=" + newNode.asText());
+            }
+          } else {
+
+            if (nodename == null) {
+              walker(paths, name, newNode);
+            } else {
+              walker(paths, nodename + "." + name, newNode);
+            }
+          }
+
+        }
+      }
+    } else if (node.isArray()) {
+      Iterator<JsonNode> arrayItemsIterator = node.elements();
+      ArrayList<JsonNode> arrayItemsList = Lists.newArrayList(arrayItemsIterator);
+      for (JsonNode arrayNode : arrayItemsList) {
+        walker(paths, nodename, arrayNode);
+      }
+    } else if (node.isValueNode()) {
+      paths.add(nodename + "=" + node.asText());
+    }
+  }
+}