com.thoughtworks.go.server.web.JsonRenderer.java Source code

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Here is the source code for com.thoughtworks.go.server.web.JsonRenderer.java

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/*
 * Copyright 2019 ThoughtWorks, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.thoughtworks.go.server.web;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializer;
import com.thoughtworks.go.util.json.JsonAware;
import com.thoughtworks.go.util.json.JsonFakeMap;
import com.thoughtworks.go.util.json.JsonUrl;
import org.springframework.context.MessageSourceResolvable;

import java.io.StringWriter;
import java.io.Writer;

public class JsonRenderer {

    public static String render(Object o) {
        return render(o, null);
    }

    public static String render(Object o, GoRequestContext context) {
        StringWriter writer = new StringWriter();
        render(o, context, writer);
        return writer.toString();
    }

    public static void render(Object o, GoRequestContext context, Writer writer) {
        if (o instanceof JsonAware) {
            o = ((JsonAware) o).toJson();
        } else if (o instanceof JsonFakeMap) {
            o = ((JsonFakeMap) o).get("json");
        }
        gsonBuilder(context).toJson(o, writer);
    }

    private static Gson gsonBuilder(final GoRequestContext requestContext) {
        GsonBuilder builder = new GsonBuilder();
        builder.registerTypeAdapter(JsonUrl.class, (JsonSerializer<JsonUrl>) (src, typeOfSrc, context) -> {
            if (requestContext == null) {
                return new JsonPrimitive(src.getUrl());
            } else {
                return new JsonPrimitive(requestContext.getFullRequestPath() + src.getUrl());
            }
        });

        builder.registerTypeHierarchyAdapter(MessageSourceResolvable.class,
                (JsonSerializer<MessageSourceResolvable>) (src, typeOfSrc, context) -> {
                    if (requestContext == null) {
                        return new JsonPrimitive(src.getDefaultMessage());
                    } else {
                        return new JsonPrimitive(requestContext.getMessage(src));
                    }
                });

        builder.serializeNulls();
        return builder.create();
    }
}