ibessonov commented on a change in pull request #72:
URL: https://github.com/apache/ignite-3/pull/72#discussion_r598708174
##########
File path:
modules/rest/src/main/java/org/apache/ignite/rest/presentation/json/JsonConverter.java
##########
@@ -35,6 +52,213 @@
return gson.toJson(obj);
}
+ /** */
+ public static ConfigurationVisitor<JsonElement> jsonVisitor() {
+ return new ConfigurationVisitor<JsonElement>() {
+ /** */
+ private final Deque<JsonObject> jsonObjectsStack = new
ArrayDeque<>();
+
+ /** {@inheritDoc} */
+ @Override public JsonElement visitLeafNode(String key,
Serializable val) {
+ JsonElement jsonLeaf = toJsonLeaf(val);
+
+ if (!jsonObjectsStack.isEmpty())
+ jsonObjectsStack.peek().add(key, jsonLeaf);
+
+ return jsonLeaf;
+ }
+
+ /** {@inheritDoc} */
+ @Override public JsonElement visitInnerNode(String key, InnerNode
node) {
+ JsonObject innerJsonNode = new JsonObject();
+
+ jsonObjectsStack.push(innerJsonNode);
+
+ node.traverseChildren(this);
+
+ jsonObjectsStack.pop();
+
+ if (!jsonObjectsStack.isEmpty())
+ jsonObjectsStack.peek().add(key, innerJsonNode);
+
+ return innerJsonNode;
+ }
+
+ /** {@inheritDoc} */
+ @Override public <N extends InnerNode> JsonElement
visitNamedListNode(String key, NamedListNode<N> node) {
+ JsonObject namedListJsonNode = new JsonObject();
+
+ jsonObjectsStack.push(namedListJsonNode);
+
+ for (String subkey : node.namedListKeys())
+ node.get(subkey).accept(subkey, this);
+
+ jsonObjectsStack.pop();
+
+ if (!jsonObjectsStack.isEmpty())
+ jsonObjectsStack.peek().add(key, namedListJsonNode);
+
+ return namedListJsonNode;
+ }
+
+ /** */
+ @NotNull private JsonElement toJsonLeaf(Serializable val) {
+ if (val == null)
+ return JsonNull.INSTANCE;
+
+ Class<? extends Serializable> valClass = val.getClass();
+
+ if (!valClass.isArray())
+ return toJsonPrimitive(val);
+
+ JsonArray jsonArray = new JsonArray();
+
+ for (int i = 0; i < Array.getLength(val); i++)
+ jsonArray.add(toJsonPrimitive(Array.get(val, i)));
+
+ return jsonArray;
+ }
+
+ /** */
+ @NotNull private JsonElement toJsonPrimitive(Object val) {
+ if (val == null)
+ return JsonNull.INSTANCE;
+
+ if (val instanceof Boolean)
+ return new JsonPrimitive((Boolean)val);
+
+ if (val instanceof String)
+ return new JsonPrimitive((String)val);
+
+ if (val instanceof Number)
+ return new JsonPrimitive((Number)val);
+
+ assert false : val;
Review comment:
The difference is that "assert false" explicitly says that this code
branch is not valid
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