| /* |
| * Copyright (C) 2017, David Pursehouse <david.pursehouse@gmail.com> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| 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. |
| * |
| * @since 4.10.0 |
| */ |
| 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. |
| */ |
| 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); |
| } |
| } |