/* * MIT License * * NiFi Protobuf Processor * Copyright (c) 2017 William Hiver * https://github.com/whiver/nifi-protobuf-processor * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.github.whiver.nifi.mapper; import com.google.protobuf.InvalidProtocolBufferException; import com.google.protobuf.Message; import com.google.protobuf.util.JsonFormat; import java.io.IOException; import java.io.Reader; public class JSONMapper { /** * Format a Protocol Buffers Message to a JSON string * @param data The Message to be formatted * @return A JSON String representing the data * @throws InvalidProtocolBufferException Thrown in case of invalid Message data */ public static String toJSON(Message data) throws InvalidProtocolBufferException { JsonFormat.Printer printer = JsonFormat.printer(); return printer.print(data); } /** * Extract data from a JSON String and use them to construct a Protocol Buffers Message. * @param jsonReader A reader providing the JSON data to parse * @param builder A Message builder to use to construct the resulting Message * @return the constructed Message * @throws InvalidProtocolBufferException Thrown in case of invalid Message data */ public static Message fromJSON(Reader jsonReader, Message.Builder builder) throws IOException { JsonFormat.Parser parser = JsonFormat.parser(); parser.merge(jsonReader, builder); return builder.build(); } }