feature: add OptimizelyJSON

core-api/src/main/java/com/optimizely/ab/config/parser/ConfigParser.java

@@ -16,6 +16,10 @@
  */
 package com.optimizely.ab.config.parser;
 
+import com.google.gson.JsonElement;
+import com.google.gson.JsonIOException;
+import com.google.gson.JsonSyntaxException;
+import com.google.gson.stream.JsonWriter;
 import com.optimizely.ab.config.ProjectConfig;
 
 import javax.annotation.Nonnull;
@@ -38,4 +42,10 @@ public interface ConfigParser {
  * @throws ConfigParseException when there's an issue parsing the provided project config
  */
  ProjectConfig parseProjectConfig(@Nonnull String json) throws ConfigParseException;
+
+ /**
+ * OptimizelyJSON parsing
+ */
+ String toJson(Object src) throws ConfigParseException;
+ <T> T fromJson(String json, Class<T> clazz) throws ConfigParseException;
 }

core-api/src/main/java/com/optimizely/ab/config/parser/GsonConfigParser.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2016-2017, 2019, Optimizely and contributors
+ * Copyright 2016-2017, 2019-2020, Optimizely and contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,7 @@
 
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
+import com.google.gson.JsonSyntaxException;
 import com.optimizely.ab.config.*;
 import com.optimizely.ab.config.audience.Audience;
 import com.optimizely.ab.config.audience.TypedAudience;
@@ -27,7 +28,7 @@
 /**
  * {@link Gson}-based config parser implementation.
  */
-final class GsonConfigParser implements ConfigParser {
+final public class GsonConfigParser implements ConfigParser {
 
  @Override
  public ProjectConfig parseProjectConfig(@Nonnull String json) throws ConfigParseException {
@@ -52,4 +53,17 @@ public ProjectConfig parseProjectConfig(@Nonnull String json) throws ConfigParse
  throw new ConfigParseException("Unable to parse datafile: " + json, e);
  }
  }
+
+ public String toJson(Object src) {
+ return new Gson().toJson(src);
+ }
+
+ public <T> T fromJson(String json, Class<T> clazz) throws ConfigParseException {
+ try {
+ return new Gson().fromJson(json, clazz);
+ } catch (Exception e) {
+ throw new ConfigParseException("Unable to parse JSON string: " + e.toString());
+ }
+ }
+
 }

core-api/src/main/java/com/optimizely/ab/config/parser/JacksonConfigParser.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2016-2018, Optimizely and contributors
+ * Copyright 2016-2018, 2020, Optimizely and contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
  */
 package com.optimizely.ab.config.parser;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.module.SimpleModule;
 import com.optimizely.ab.config.DatafileProjectConfig;
@@ -25,11 +26,12 @@
 import com.optimizely.ab.config.audience.TypedAudience;
 
 import javax.annotation.Nonnull;
+import java.io.IOException;
 
 /**
  * {@code Jackson}-based config parser implementation.
  */
-final class JacksonConfigParser implements ConfigParser {
+final public class JacksonConfigParser implements ConfigParser {
  private ObjectMapper objectMapper;
 
  public JacksonConfigParser() {
@@ -61,4 +63,23 @@ public ProjectConfigModule() {
  addDeserializer(Condition.class, new ConditionJacksonDeserializer(objectMapper));
  }
  }
+
+ @Override
+ public String toJson(Object src) throws ConfigParseException {
+ try {
+ return objectMapper.writeValueAsString(src);
+ } catch (JsonProcessingException e) {
+ throw new ConfigParseException("Serialization failed: " + e.toString());
+ }
+ }
+
+ @Override
+ public <T> T fromJson(String json, Class<T> clazz) throws ConfigParseException {
+ try {
+ return objectMapper.readValue(json, clazz);
+ } catch (IOException e) {
+ throw new ConfigParseException("Unable to parse JSON string: " + e.toString());
+ }
+ }
+
 }

core-api/src/main/java/com/optimizely/ab/config/parser/JsonConfigParser.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2016-2019, Optimizely and contributors
+ * Copyright 2016-2019, 2020, Optimizely and contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,17 +28,12 @@
 import org.json.JSONTokener;
 
 import javax.annotation.Nonnull;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
 
 /**
  * {@code org.json}-based config parser implementation.
  */
-final class JsonConfigParser implements ConfigParser {
+final public class JsonConfigParser implements ConfigParser {
 
  @Override
  public ProjectConfig parseProjectConfig(@Nonnull String json) throws ConfigParseException {
@@ -385,4 +380,22 @@ private List<Rollout> parseRollouts(JSONArray rolloutsJson) {
 
  return rollouts;
  }
+
+ @Override
+ public String toJson(Object src) {
+ JSONObject json = (JSONObject)JsonHelpers.convertToJsonObject(src);
+ return json.toString();
+ }
+
+ @Override
+ public <T> T fromJson(String json, Class<T> clazz) throws ConfigParseException {
+ if (Map.class.isAssignableFrom(clazz)) {
+ JSONObject obj = new JSONObject(json);
+ return (T)JsonHelpers.jsonObjectToMap(obj);
+ }
+
+ // org.json parser does not support parsing to user objects
+ throw new ConfigParseException("Parsing fails with a unsupported type");
+ }
+
 }

core-api/src/main/java/com/optimizely/ab/config/parser/JsonHelpers.java

@@ -0,0 +1,81 @@
+/**
+ *
+ * Copyright 2020, Optimizely and contributors
+ *
+ * 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.
+ */
+package com.optimizely.ab.config.parser;
+
+import org.json.JSONArray;
+import org.json.JSONObject;
+
+import java.util.*;
+
+final class JsonHelpers {
+
+ static Object convertToJsonObject(Object obj) {
+ if (obj instanceof Map) {
+ Map<Object, Object> map = (Map)obj;
+ JSONObject jObj = new JSONObject();
+ for (Map.Entry entry : map.entrySet()) {
+ jObj.put(entry.getKey().toString(), convertToJsonObject(entry.getValue()));
+ }
+ return jObj;
+ } else if (obj instanceof List) {
+ List list = (List)obj;
+ JSONArray jArray = new JSONArray();
+ for (Object value : list) {
+ jArray.put(convertToJsonObject(value));
+ }
+ return jArray;
+ } else {
+ return obj;
+ }
+ }
+
+ static Map<String, Object> jsonObjectToMap(JSONObject jObj) {
+ Map<String, Object> map = new HashMap<>();
+
+ Iterator<String> keys = jObj.keys();
+ while(keys.hasNext()) {
+ String key = keys.next();
+ Object value = jObj.get(key);
+
+ if (value instanceof JSONArray) {
+ value = jsonArrayToList((JSONArray)value);
+ } else if (value instanceof JSONObject) {
+ value = jsonObjectToMap((JSONObject)value);
+ }
+
+ map.put(key, value);
+ }
+
+ return map;
+ }
+
+ static List<Object> jsonArrayToList(JSONArray array) {
+ List<Object> list = new ArrayList<>();
+ for(Object value : array) {
+ if (value instanceof JSONArray) {
+ value = jsonArrayToList((JSONArray)value);
+ } else if (value instanceof JSONObject) {
+ value = jsonObjectToMap((JSONObject)value);
+ }
+
+ list.add(value);
+ }
+
+ return list;
+ }
+
+}

core-api/src/main/java/com/optimizely/ab/config/parser/JsonSimpleConfigParser.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2016-2019, Optimizely and contributors
+ * Copyright 2016-2019, 2020, Optimizely and contributors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,6 +26,7 @@
 import com.optimizely.ab.internal.ConditionUtils;
 import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
+import org.json.simple.JSONValue;
 import org.json.simple.parser.JSONParser;
 import org.json.simple.parser.ParseException;
 
@@ -41,7 +42,7 @@
 /**
  * {@code json-simple}-based config parser implementation.
  */
-final class JsonSimpleConfigParser implements ConfigParser {
+final public class JsonSimpleConfigParser implements ConfigParser {
 
  @Override
  public ProjectConfig parseProjectConfig(@Nonnull String json) throws ConfigParseException {
@@ -371,5 +372,22 @@ private List<Rollout> parseRollouts(JSONArray rolloutsJson) {
 
  return rollouts;
  }
+
+ @Override
+ public String toJson(Object src) {
+ return JSONValue.toJSONString(src);
+ }
+
+ @Override
+ public <T> T fromJson(String json, Class<T> clazz) throws ConfigParseException {
+ if (Map.class.isAssignableFrom(clazz)) {
+ org.json.JSONObject obj = new org.json.JSONObject(json);
+ return (T)JsonHelpers.jsonObjectToMap(obj);
+ }
+
+ // org.json.simple does not support parsing to user objects
+ throw new ConfigParseException("Parsing fails with a unsupported type");
+ }
+
 }
 

core-api/src/main/java/com/optimizely/ab/config/parser/UnsupportedOperationException.java

@@ -0,0 +1,27 @@
+/**
+ *
+ * Copyright 2020, Optimizely and contributors
+ *
+ * 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.
+ */
+package com.optimizely.ab.config.parser;
+
+public final class UnsupportedOperationException extends Exception {
+ public UnsupportedOperationException(String message) {
+ super(message);
+ }
+
+ public UnsupportedOperationException(String message, Throwable cause) {
+ super(message, cause);
+ }
+}