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LfsProtocolServlet and FileLfsServlet both implement the same setup of the Gson object. Factor it out to a common class and reuse it. Change-Id: I5696404fad140cbff1b712ebb04a7e8bba60e4b4 Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>stable-4.10
David Pursehouse
7 years ago
3 changed files with 123 additions and 46 deletions
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/* |
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* Copyright (C) 2017, David Pursehouse <david.pursehouse@gmail.com> |
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* and other copyright owners as documented in the project's IP log. |
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* |
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* This program and the accompanying materials are made available |
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* under the terms of the Eclipse Distribution License v1.0 which |
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* accompanies this distribution, is reproduced below, and is |
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* available at http://www.eclipse.org/org/documents/edl-v10.php
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* |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials provided |
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* with the distribution. |
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* |
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* - Neither the name of the Eclipse Foundation, Inc. nor the |
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* names of its contributors may be used to endorse or promote |
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* products derived from this software without specific prior |
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* written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package org.eclipse.jgit.lfs.server.internal; |
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import java.io.Reader; |
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import com.google.gson.FieldNamingPolicy; |
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import com.google.gson.Gson; |
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import com.google.gson.GsonBuilder; |
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import com.google.gson.JsonIOException; |
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import com.google.gson.JsonSyntaxException; |
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/** |
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* Wrapper for {@link Gson} used by LFS servlets. |
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* |
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*/ |
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public class LfsGson { |
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private static final Gson gson = new GsonBuilder() |
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.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES) |
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.disableHtmlEscaping() |
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.create(); |
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/** |
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* Wrapper class only used for serialization of error messages. |
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*/ |
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static class Error { |
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String message; |
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Error(String m) { |
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this.message = m; |
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} |
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} |
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/** |
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* Serializes the specified object into its equivalent Json representation. |
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* |
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* @param src |
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* the object for which Json representation is to be created. If |
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* this is a String, it is wrapped in an instance of |
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* {@link Error}. |
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* @param writer |
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* Writer to which the Json representation needs to be written |
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* @throws JsonIOException |
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* if there was a problem writing to the writer |
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* @see Gson#toJson(Object, Appendable) |
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*/ |
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public static void toJson(Object src, Appendable writer) |
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throws JsonIOException { |
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if (src instanceof String) { |
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gson.toJson(new Error((String) src), writer); |
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} else { |
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gson.toJson(src, writer); |
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} |
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} |
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/** |
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* Deserializes the Json read from the specified reader into an object of |
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* the specified type. |
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* |
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* @param json |
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* reader producing json from which the object is to be |
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* deserialized |
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* @param classOfT |
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* specified type to deserialize |
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* @return an Object of type T |
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* @throws JsonIOException |
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* if there was a problem reading from the Reader |
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* @throws JsonSyntaxException |
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* if json is not a valid representation for an object of type |
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* @see Gson#fromJson(Reader, java.lang.reflect.Type) |
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*/ |
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public static <T> T fromJson(Reader json, Class<T> classOfT) |
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throws JsonSyntaxException, JsonIOException { |
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return gson.fromJson(json, classOfT); |
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} |
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} |
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