/*
* Copyright (C) 2011 Alastair R. Beresford.
*
* 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.google.nigori.common;
import java.lang.reflect.Type;
import org.apache.commons.codec.binary.Base64;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.google.protobuf.ByteString;
public class TypeAdapterByteString implements JsonSerializer<ByteString>,
JsonDeserializer<ByteString> {
@Override
public JsonElement serialize(ByteString src, Type typeOfSrc,
JsonSerializationContext context) {
return context.serialize(new String(Base64.encodeBase64(src.toByteArray())));
}
@SuppressWarnings("deprecation")// see comment below
@Override
public ByteString deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
throws JsonParseException {
byte[] jsonBytes = json.getAsString().getBytes();
// (drt24) Since android ships with an ancient version of org.apache.commons.codec which
// overrides any version we ship we have to use old deprecated methods.
if (Base64.isArrayByteBase64(jsonBytes)) {
return ByteString.copyFrom(Base64.decodeBase64(jsonBytes));
} else {
throw new JsonParseException("JSON element is not correctly base64 encoded.");
}
}
}