| /* |
| * Copyright (C) 2017, David Pursehouse <david.pursehouse@gmail.com> and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.lfs.server.internal; |
| |
| import java.io.Reader; |
| |
| import com.google.gson.FieldNamingPolicy; |
| import com.google.gson.Gson; |
| import com.google.gson.GsonBuilder; |
| import com.google.gson.JsonIOException; |
| import com.google.gson.JsonSyntaxException; |
| |
| /** |
| * Wrapper for {@link com.google.gson.Gson} used by LFS servlets. |
| */ |
| public class LfsGson { |
| private static final Gson gson = new GsonBuilder() |
| .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES) |
| .disableHtmlEscaping() |
| .create(); |
| |
| /** |
| * Wrapper class only used for serialization of error messages. |
| */ |
| // TODO(ms): rename this class in next major release |
| @SuppressWarnings("JavaLangClash") |
| static class Error { |
| String message; |
| |
| Error(String m) { |
| this.message = m; |
| } |
| } |
| |
| /** |
| * Serializes the specified object into its equivalent Json representation. |
| * |
| * @param src |
| * the object for which Json representation is to be created. If |
| * this is a String, it is wrapped in an instance of |
| * {@link org.eclipse.jgit.lfs.server.internal.LfsGson.Error}. |
| * @param writer |
| * Writer to which the Json representation needs to be written |
| * @throws com.google.gson.JsonIOException |
| * if there was a problem writing to the writer |
| * @see Gson#toJson(Object, Appendable) |
| */ |
| public static void toJson(Object src, Appendable writer) |
| throws JsonIOException { |
| if (src instanceof String) { |
| gson.toJson(new Error((String) src), writer); |
| } else { |
| gson.toJson(src, writer); |
| } |
| } |
| |
| /** |
| * Deserializes the Json read from the specified reader into an object of |
| * the specified type. |
| * |
| * @param json |
| * reader producing json from which the object is to be |
| * deserialized |
| * @param classOfT |
| * specified type to deserialize |
| * @return an Object of type T |
| * @throws com.google.gson.JsonIOException |
| * if there was a problem reading from the Reader |
| * @throws com.google.gson.JsonSyntaxException |
| * if json is not a valid representation for an object of type |
| * @see Gson#fromJson(Reader, java.lang.reflect.Type) |
| * @param <T> |
| * a T object. |
| */ |
| public static <T> T fromJson(Reader json, Class<T> classOfT) |
| throws JsonSyntaxException, JsonIOException { |
| return gson.fromJson(json, classOfT); |
| } |
| } |