com.skysql.manager.api.SystemTypes.java Source code

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Here is the source code for com.skysql.manager.api.SystemTypes.java

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/*
 * This file is distributed as part of the MariaDB Manager.  It 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,
 * version 2.
 *
 * This program 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
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Copyright 2012-2014 SkySQL Corporation Ab
 */

package com.skysql.manager.api;

import java.lang.reflect.Type;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map.Entry;
import java.util.Set;

import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.skysql.manager.ui.ErrorDialog;

/**
 * The Class SystemTypes.
 */
public class SystemTypes {

    /**
     * System types supported by the API.
     */
    public enum Type {
        aws, galera;
    }

    public static String DEFAULT_SYSTEMTYPE = Type.galera.name();

    private static SystemTypes systemTypes;
    private static LinkedHashMap<String, String> typesList;

    /**
     * Gets the list.
     *
     * @return the list
     */
    public static LinkedHashMap<String, String> getList() {
        GetSystemTypes();
        return SystemTypes.typesList;
    }

    /**
     * Sets the list.
     *
     * @param typesList the types list
     */
    protected void setList(LinkedHashMap<String, String> typesList) {
        SystemTypes.typesList = typesList;
    }

    /**
     * Attempts to load system types and returns true if successful.
     *
     * @return true, if successful
     */
    public static boolean load() {
        GetSystemTypes();
        return (systemTypes != null);
    }

    /**
     * Gets the system types from the API.
     */
    private static void GetSystemTypes() {
        if (systemTypes == null) {
            APIrestful api = new APIrestful();
            if (api.get("systemtype")) {
                try {
                    systemTypes = APIrestful.getGson().fromJson(api.getResult(), SystemTypes.class);
                } catch (NullPointerException e) {
                    new ErrorDialog(e, "API did not return expected result for:" + api.errorString());
                    throw new RuntimeException("API response");
                } catch (JsonParseException e) {
                    new ErrorDialog(e, "JSON parse error in API results for:" + api.errorString());
                    throw new RuntimeException("API response");
                }
            }
        }
    }

}

// {"systemtypes":{"aws":"Amazon AWS based System","galera":"Galera multi-master System"},"warnings":["Caching directory \/usr\/local\/skysql\/cache\/api is not writeable, cannot write cache, please check existence, permissions, SELinux"]}

/**
 * The Class SystemTypesDeserializer.
 */
class SystemTypesDeserializer implements JsonDeserializer<SystemTypes> {
    public SystemTypes deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException, NullPointerException {

        SystemTypes systemTypes = new SystemTypes();

        JsonElement jsonElement = json.getAsJsonObject().get("systemtypes");
        if (jsonElement == null || jsonElement.isJsonNull()) {
            systemTypes.setList(null);
        } else {
            LinkedHashMap<String, String> types = new LinkedHashMap<String, String>();
            Set<Entry<String, JsonElement>> set = jsonElement.getAsJsonObject().entrySet();
            Iterator<Entry<String, JsonElement>> iter = set.iterator();
            while (iter.hasNext()) {
                Entry<String, JsonElement> entry = iter.next();
                String type = entry.getKey();
                String description = entry.getValue().getAsString();
                types.put(type, description);
            }
            systemTypes.setList(types);
        }
        return systemTypes;

    }

}