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package com.smartdevicelink.marshal;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.smartdevicelink.proxy.RPCMessage;
import com.smartdevicelink.proxy.RPCStruct;
import com.smartdevicelink.trace.*;
import com.smartdevicelink.trace.enums.InterfaceActivityDirection;
import com.smartdevicelink.util.DebugTool;
/*
* Responsible for marshalling and unmarshing between RPC Objects and byte streams that are sent
* over transmission
*/
public class JsonRPCMarshaller {
private static final String SDL_LIB_PRIVATE_KEY = "42baba60-eb57-11df-98cf-0800200c9a66";
public static byte[] marshall(RPCMessage msg, byte version) {
byte[] jsonBytes = null;
try {
JSONObject jsonObject = msg.serializeJSON(version);
jsonBytes = jsonObject.toString().getBytes();
SdlTrace.logMarshallingEvent(InterfaceActivityDirection.Transmit, jsonBytes, SDL_LIB_PRIVATE_KEY);
} catch (JSONException e) {
DebugTool.logError("Failed to encode messages to JSON.", e);
}
return jsonBytes;
}
public static Hashtable<String, Object> unmarshall(byte[] message) {
SdlTrace.logMarshallingEvent(InterfaceActivityDirection.Receive, message, SDL_LIB_PRIVATE_KEY);
Hashtable<String, Object> ret = null;
try {
String jsonString = new String(message);
JSONObject jsonObject = new JSONObject(jsonString);
ret = deserializeJSONObject(jsonObject);
} catch (JSONException e) {
DebugTool.logError("Failed to parse JSON", e);
}
return ret;
}
@SuppressWarnings("unchecked")
public static Hashtable<String, Object> deserializeJSONObject(JSONObject jsonObject)
throws JSONException {
Hashtable<String, Object> ret = new Hashtable<String, Object>();
Iterator<String> it = jsonObject.keys();
String key = null;
while (it.hasNext()) {
key = it.next();
Object value = jsonObject.get(key);
if (value instanceof JSONObject) {
ret.put(key, deserializeJSONObject((JSONObject)value));
} else if (value instanceof JSONArray) {
JSONArray arrayValue = (JSONArray) value;
List<Object> putList = new ArrayList<Object>(arrayValue.length());
for (int i = 0; i < arrayValue.length(); i++) {
Object anObject = arrayValue.get(i);
if (anObject instanceof JSONObject) {
Hashtable<String, Object> deserializedObject = deserializeJSONObject((JSONObject)anObject);
putList.add(deserializedObject);
} else {
putList.add(anObject);
}
}
ret.put(key, putList);
} else {
ret.put(key, value);
}
}
return ret;
}
@SuppressWarnings("unchecked")
private static JSONArray serializeList(List<?> list) throws JSONException{
JSONArray toPut = new JSONArray();
Iterator<Object> valueIterator = (Iterator<Object>) list.iterator();
while(valueIterator.hasNext()){
Object anObject = valueIterator.next();
if (anObject instanceof RPCStruct) {
RPCStruct toSerialize = (RPCStruct) anObject;
toPut.put(toSerialize.serializeJSON());
} else if(anObject instanceof Hashtable){
Hashtable<String, Object> toSerialize = (Hashtable<String, Object>)anObject;
toPut.put(serializeHashtable(toSerialize));
} else {
toPut.put(anObject);
}
}
return toPut;
}
@SuppressWarnings({"unchecked" })
public static JSONObject serializeHashtable(Hashtable<String, Object> hash) throws JSONException{
JSONObject obj = new JSONObject();
Iterator<String> hashKeyIterator = hash.keySet().iterator();
while (hashKeyIterator.hasNext()){
String key = (String) hashKeyIterator.next();
Object value = hash.get(key);
if (value instanceof RPCStruct) {
obj.put(key, ((RPCStruct) value).serializeJSON());
} else if (value instanceof List<?>) {
obj.put(key, serializeList((List<?>) value));
} else if (value instanceof Hashtable) {
obj.put(key, serializeHashtable((Hashtable<String, Object>)value));
} else {
obj.put(key, value);
}
}
return obj;
}
}
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