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- /*
- * 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);
- }
- }
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