| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.pirk.querier.wideskies; |
| |
| import com.google.gson.Gson; |
| import com.google.gson.JsonDeserializationContext; |
| import com.google.gson.JsonDeserializer; |
| import com.google.gson.JsonElement; |
| import com.google.gson.JsonObject; |
| import com.google.gson.JsonParseException; |
| import com.google.gson.reflect.TypeToken; |
| import org.apache.pirk.encryption.Paillier; |
| import org.apache.pirk.query.wideskies.Query; |
| |
| import java.lang.reflect.Type; |
| import java.math.BigInteger; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Custom deserializer for Querier class for Gson. |
| */ |
| public class QuerierDeserializer implements JsonDeserializer<Querier> |
| { |
| |
| private static final Gson gson = new Gson(); |
| |
| @Override public Querier deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException |
| { |
| JsonObject jsonObject = jsonElement.getAsJsonObject(); |
| // Check the version number. |
| long querierVersion = jsonObject.get("querierVersion").getAsLong(); |
| if (querierVersion != Querier.querierSerialVersionUID) |
| { |
| throw new JsonParseException( |
| "Attempt to deserialize unsupported query version. Supported: " + Querier.querierSerialVersionUID + "; Received: " + querierVersion); |
| } |
| // Then deserialize the Query Info |
| Query query = gson.fromJson(jsonObject.get("query").toString(), Query.class); |
| |
| // Now Paillier |
| Paillier paillier = deserializePaillier(jsonObject.get("paillier").getAsJsonObject()); |
| |
| List<String> selectors = gson.fromJson(jsonObject.get("selectors").toString(), new TypeToken<List<String>>() |
| { |
| }.getType()); |
| Map<Integer,String> embedSelectorMap = gson.fromJson(jsonObject.get("embedSelectorMap").toString(), new TypeToken<Map<Integer,String>>() |
| { |
| }.getType()); |
| |
| return new Querier(selectors, paillier, query, embedSelectorMap); |
| } |
| |
| /** |
| * Deserializes a Paillier JsonObject. |
| * |
| * @param paillier A JsonObject at the root of a serialied Paillier object. |
| * @return A Paillier object of the deserialized Json. |
| */ |
| private Paillier deserializePaillier(JsonObject paillier) |
| { |
| BigInteger p = new BigInteger(paillier.get("p").getAsString()); |
| BigInteger q = new BigInteger(paillier.get("q").getAsString()); |
| int bitLength = paillier.get("bitLength").getAsInt(); |
| return new Paillier(p, q, bitLength); |
| } |
| |
| } |