org.structr.rest.servlet.ThreadLocalGson.java Source code

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Here is the source code for org.structr.rest.servlet.ThreadLocalGson.java

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/**
 * Copyright (C) 2010-2016 Structr GmbH
 *
 * This file is part of Structr <http://structr.org>.
 *
 * Structr is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * Structr is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Structr.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.structr.rest.servlet;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.structr.common.error.FrameworkException;
import org.structr.core.IJsonInput;
import org.structr.core.Result;
import org.structr.core.Value;
import org.structr.core.app.StructrApp;
import org.structr.rest.JsonInputGSONAdapter;
import org.structr.rest.adapter.FrameworkExceptionGSONAdapter;
import org.structr.rest.adapter.ResultGSONAdapter;

/**
 *
 */
public class ThreadLocalGson extends ThreadLocal<Gson> {

    private int outputNestingDepth = 3;
    private Value<String> propertyView = null;

    public ThreadLocalGson(final Value<String> propertyView, final int outputNestingDepth) {

        this.propertyView = propertyView;
        this.outputNestingDepth = outputNestingDepth;
    }

    @Override
    protected Gson initialValue() {

        ResultGSONAdapter resultGsonAdapter = new ResultGSONAdapter(propertyView, outputNestingDepth);
        JsonInputGSONAdapter jsonInputAdapter = new JsonInputGSONAdapter();

        // create GSON serializer
        final GsonBuilder gsonBuilder = new GsonBuilder().setPrettyPrinting().serializeNulls()
                .registerTypeHierarchyAdapter(FrameworkException.class, new FrameworkExceptionGSONAdapter())
                .registerTypeAdapter(IJsonInput.class, jsonInputAdapter)
                .registerTypeAdapter(Result.class, resultGsonAdapter);

        final boolean lenient = Boolean.parseBoolean(StructrApp.getConfigurationValue("json.lenient", "false"));
        if (lenient) {

            // Serializes NaN, -Infinity, Infinity, see http://code.google.com/p/google-gson/issues/detail?id=378
            gsonBuilder.serializeSpecialFloatingPointValues();

        }

        return gsonBuilder.create();
    }
}