sergey-chugunov-1985 commented on a change in pull request #72:
URL: https://github.com/apache/ignite-3/pull/72#discussion_r600229646
##########
File path:
modules/rest/src/main/java/org/apache/ignite/rest/presentation/json/JsonConverter.java
##########
@@ -35,6 +52,221 @@
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);
+
+ addToParent(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();
+
+ addToParent(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();
+
+ addToParent(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;
+
+ throw new
IllegalArgumentException(val.getClass().getCanonicalName());
+ }
+
+ /**
+ * Add subelement to the paretn JSON object if it exists.
+ *
+ * @param key Key for the passed JSON element.
+ * @param jsonElement JSON element to add to the parent.
+ */
+ private void addToParent(String key, JsonElement jsonElement) {
+ if (!jsonObjectsStack.isEmpty())
+ jsonObjectsStack.peek().add(key, jsonElement);
+ }
+ };
+ }
+
+ /** */
+ public static ConfigurationSource jsonSource(JsonElement jsonElement) {
+ //TODO IGNITE-14372 Finish this implementation.
+ return null;
+ }
+
+ private static class JsonObjectConfigurationSource implements
ConfigurationSource {
+ /** Shared. */
+ private final List<String> path;
+
+ /** */
+ private final JsonObject jsonObject;
+
+ private JsonObjectConfigurationSource(List<String> path, JsonObject
jsonObject) {
+ this.path = path;
+ this.jsonObject = jsonObject;
+ }
+
+ @Override public <T> T unwrap(Class<T> clazz) {
+ throw new IllegalArgumentException(""); //TODO IGNITE-14372
Implement.
+ }
+
+ @Override public void descend(ConstructableTreeNode node) {
+ for (Map.Entry<String, JsonElement> entry : jsonObject.entrySet())
{
+ String key = entry.getKey();
+
+ path.add(key);
+
+ JsonElement jsonElement = entry.getValue();
+
+ try {
+ if (jsonElement.isJsonArray() ||
jsonElement.isJsonPrimitive())
+ node.construct(key, new
JsonPrimitiveConfigurationSource(path, jsonElement));
+ else if (jsonElement.isJsonNull()) {
+ node.construct(key, null);
+ }
+ else {
+ assert jsonElement.isJsonObject();
+
+ List<String> path = new ArrayList<>(this.path.size() +
1);
+ path.addAll(this.path);
+ path.add(key);
+
+ node.construct(key, new
JsonObjectConfigurationSource(path, jsonElement.getAsJsonObject()));
+ }
+ }
+ catch (NoSuchElementException e) {
+ throw new IllegalArgumentException(""); //TODO
IGNITE-14372 Update comment.
+ }
+
+ path.remove(path.size() - 1);
+ }
+ }
+ }
+
+ private static class JsonPrimitiveConfigurationSource implements
ConfigurationSource {
+ private final List<String> path;
+
+ private final JsonElement jsonLeaf;
+
+ private JsonPrimitiveConfigurationSource(List<String> path,
JsonElement jsonLeaf) {
+ this.path = path;
+ this.jsonLeaf = jsonLeaf;
+ }
+
+ @Override public <T> T unwrap(Class<T> clazz) {
+ if (clazz.isArray() != jsonLeaf.isJsonArray())
+ throw new IllegalArgumentException(""); //TODO IGNITE-14372
Update comment.
+
+ return null;
+ }
+
+ @Override public void descend(ConstructableTreeNode node) {
+ throw new IllegalArgumentException(""); //TODO IGNITE-14372 Update
comment.
+ }
+
+ private <T> T unwrap(JsonPrimitive jsonPrimitive, Class<T> clazz) {
+ assert !clazz.isArray();
+
+ if (clazz == String.class) {
+ if (!jsonPrimitive.isString())
+ throw new IllegalArgumentException("");
+
+ return clazz.cast(jsonPrimitive.getAsString());
+ }
+
+ if (Number.class.isAssignableFrom(clazz)) {
+ if (!jsonPrimitive.isNumber())
+ throw new IllegalArgumentException("");
+
+ if (clazz == Double.class)
+ return clazz.cast(jsonPrimitive.getAsDouble());
+
+ if (clazz == Long.class)
+ return clazz.cast(jsonPrimitive.getAsLong());
+
+ if (clazz == Integer.class) {
+ long longValue = jsonPrimitive.getAsLong();
+
+ if (longValue < Integer.MIN_VALUE || longValue >
Integer.MAX_VALUE)
+ throw new IllegalArgumentException("");
Review comment:
TODO needed.
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