Feature/json array add methods (#301)

* [json-node] Add extract() methods to assist filtering and mapping

* [json-node] Add helper add() methods to JsonArray

Author: rbygrave

json-node/src/main/java/io/avaje/json/node/JsonArray.java

@@ -83,4 +83,32 @@ public JsonArray add(JsonNode element) {
     return this;
   }
 
+  /**
+   * Add a String value.
+   */
+  public JsonArray add(String value) {
+    return add(JsonString.of(value));
+  }
+
+  /**
+   * Add a boolean value.
+   */
+  public JsonArray add(boolean value) {
+    return add(JsonBoolean.of(value));
+  }
+
+  /**
+   * Add a int value.
+   */
+  public JsonArray add(int value) {
+    return add(JsonInteger.of(value));
+  }
+
+  /**
+   * Add a long value.
+   */
+  public JsonArray add(long value) {
+    return add(JsonLong.of(value));
+  }
+
 }

json-node/src/test/java/io/avaje/json/node/JsonArrayTest.java

@@ -69,4 +69,22 @@ void text() {
     assertThat(JsonArray.create().text()).isEqualTo("[]");
     assertThat(basicArray.text()).isEqualTo("[42, foo]");
   }
+
+  @Test
+  void add() {
+    JsonArray array = JsonArray.create()
+      .add("string")
+      .add(1).add(99L)
+      .add(true)
+      .add(JsonObject.create());
+
+    List<JsonNode> elements = array.elements();
+    assertThat(elements).hasSize(5);
+    assertThat(elements.get(0)).isInstanceOf(JsonString.class);
+    assertThat(elements.get(1)).isInstanceOf(JsonInteger.class);
+    assertThat(elements.get(2)).isInstanceOf(JsonLong.class);
+    assertThat(elements.get(3)).isInstanceOf(JsonBoolean.class);
+    assertThat(elements.get(4)).isInstanceOf(JsonObject.class);
+  }
+
 }

json-node/src/test/java/io/avaje/json/node/adapter/JsonNodeAdaptersTest.java

@@ -98,8 +98,8 @@ void create_JsonString_expect_sameInstance() {
   @Test
   void arrayCreateOfMixed_defaultStream() {
     JsonArray jsonArray = JsonArray.create()
-      .add(JsonInteger.of(42))
-      .add(JsonString.of("foo"));
+      .add(42)
+      .add("foo");
 
     var asJson = node.toJson(jsonArray);
     assertThat(asJson).isEqualTo("[42,\"foo\"]");