Add JsonToPdxConverter interface implementation to convert JSON to PDX using Apache Geode's o.a.g.pdx.JSONFormatter class.

Resolves gh-67.

spring-geode/src/main/java/org/springframework/geode/data/json/converter/support/JSONFormatterJsonToPdxConverter.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * 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
+ *
+ *     https://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.
+ */
+package org.springframework.geode.data.json.converter.support;
+
+import org.apache.geode.pdx.JSONFormatter;
+import org.apache.geode.pdx.PdxInstance;
+
+import org.springframework.geode.data.json.converter.JsonToPdxConverter;
+import org.springframework.lang.NonNull;
+
+/**
+ * A {@link JsonToPdxConverter} implementation using the Apache Geode {@link JSONFormatter} to convert
+ * from a {@literal JSON} {@link String} to a {@link PdxInstance}.
+ *
+ * @author John Blum
+ * @see org.apache.geode.pdx.JSONFormatter
+ * @see org.apache.geode.pdx.PdxInstance
+ * @see org.springframework.geode.data.json.converter.JsonToPdxConverter
+ * @since 1.3.0
+ */
+public class JSONFormatterJsonToPdxConverter implements JsonToPdxConverter {
+
+	/**
+	 * @inheritDoc
+	 */
+	@Override
+	public final @NonNull PdxInstance convert(@NonNull String json) {
+		return convertJsonToPdx(json);
+	}
+
+	/**
+	 * Converts the given JSON to {@link PdxInstance PDX}.
+	 *
+	 * @param json {@link String} containing JSON to convert to PDX; must not be {@literal null}.
+	 * @return JSON for the given {@link PdxInstance PDX}.
+	 * @see org.apache.geode.pdx.JSONFormatter#fromJSON(String)
+	 * @see org.apache.geode.pdx.PdxInstance
+	 */
+	protected @NonNull PdxInstance convertJsonToPdx(@NonNull String json) {
+		return JSONFormatter.fromJSON(json);
+	}
+}