com.helion3.safeguard.util.DataUtil.java Source code

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Here is the source code for com.helion3.safeguard.util.DataUtil.java

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/**
 * This file is part of SafeGuard, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2016 Helion3 http://helion3.com/
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.helion3.safeguard.util;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Optional;
import java.util.Set;

import org.spongepowered.api.data.DataContainer;
import org.spongepowered.api.data.DataQuery;
import org.spongepowered.api.data.DataView;
import org.spongepowered.api.data.MemoryDataContainer;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import com.helion3.safeguard.SafeGuard;

public class DataUtil {
    private DataUtil() {
    }

    /**
     * Checks an object against known primitive object types.
     *
     * @param object
     * @return boolean If object is a primitive type
     */
    public static boolean isPrimitiveType(Object object) {
        return (object instanceof Boolean || object instanceof Byte || object instanceof Character
                || object instanceof Double || object instanceof Float || object instanceof Integer
                || object instanceof Long || object instanceof Short || object instanceof String);
    }

    /**
     * Converts a DataView object into a JsonObject.
     *
     * @param view DataView
     * @return JsonObject JsonObject representation of the DataView
     */
    public static JsonObject jsonFromDataView(DataView view) {
        JsonObject json = new JsonObject();

        Set<DataQuery> keys = view.getKeys(false);
        for (DataQuery query : keys) {
            Optional<Object> optional = view.get(query);
            if (optional.isPresent()) {
                String key = query.asString(".");

                if (optional.get() instanceof List) {
                    List<?> list = (List<?>) optional.get();
                    Iterator<?> iterator = list.iterator();
                    while (iterator.hasNext()) {
                        Object object = iterator.next();

                        if (object instanceof DataView) {
                            json.add(key, jsonFromDataView((DataView) object));
                        } else if (DataUtil.isPrimitiveType(object)) {
                            Gson gson = new GsonBuilder().create();
                            JsonArray array = gson.toJsonTree(optional.get()).getAsJsonArray();
                            json.add(key, array);
                            break;
                        } else {
                            SafeGuard.getLogger()
                                    .error("Unsupported list data type: " + object.getClass().getName());
                        }
                    }
                } else if (optional.get() instanceof DataView) {
                    json.add(key, jsonFromDataView((DataView) optional.get()));
                } else {
                    Object obj = optional.get();

                    if (obj instanceof String) {
                        json.addProperty(key, (String) obj);
                    } else if (obj instanceof Number) {
                        json.addProperty(key, (Number) obj);
                    } else if (obj instanceof Boolean) {
                        json.addProperty(key, (Boolean) obj);
                    } else if (obj instanceof Character) {
                        json.addProperty(key, (Character) obj);
                    }
                }
            }
        }

        return json;
    }

    /**
     * Convert JSON to a DataContainer.
     * @param json JsonObject
     * @return DataContainer
     */
    public static DataContainer jsonToDataContainer(JsonObject json) {
        DataContainer result = new MemoryDataContainer();

        for (Entry<String, JsonElement> entry : json.entrySet()) {
            DataQuery keyQuery = DataQuery.of(entry.getKey());
            Object object = entry.getValue();

            if (object instanceof JsonObject) {
                result.set(keyQuery, jsonToDataContainer((JsonObject) object));
            } else if (object instanceof JsonArray) {
                JsonArray array = (JsonArray) object;
                Iterator<JsonElement> iterator = array.iterator();

                List<Object> list = new ArrayList<Object>();
                while (iterator.hasNext()) {
                    Object child = iterator.next();

                    if (child instanceof JsonPrimitive) {
                        JsonPrimitive primitive = (JsonPrimitive) child;

                        if (primitive.isString()) {
                            list.add(primitive.getAsString());
                        } else if (primitive.isNumber()) {
                            // @todo may be wrong format. how do we handle?
                            list.add(primitive.getAsInt());
                        } else if (primitive.isBoolean()) {
                            list.add(primitive.getAsBoolean());
                        } else {
                            SafeGuard.getLogger()
                                    .error("Unhandled list JsonPrimitive data type: " + primitive.toString());
                        }
                    }
                }

                result.set(keyQuery, list);
            } else {
                if (object instanceof JsonPrimitive) {
                    JsonPrimitive primitive = (JsonPrimitive) object;

                    if (primitive.isString()) {
                        result.set(keyQuery, primitive.getAsString());
                    } else if (primitive.isNumber()) {
                        // @todo may be wrong format. how do we handle?
                        result.set(keyQuery, primitive.getAsInt());
                    } else if (primitive.isBoolean()) {
                        result.set(keyQuery, primitive.getAsBoolean());
                    } else {
                        SafeGuard.getLogger().error("Unhandled JsonPrimitive data type: " + primitive.toString());
                    }
                }
            }
        }

        return result;
    }
}