com.intellectualcrafters.plot.uuid.NameFetcher.java Source code

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Here is the source code for com.intellectualcrafters.plot.uuid.NameFetcher.java

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////////////////////////////////////////////////////////////////////////////////////////////////////
// PlotSquared - A plot manager and world generator for the Bukkit API                             /
// Copyright (c) 2014 IntellectualSites/IntellectualCrafters                                       /
//                                                                                                 /
// This program 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.                                                             /
//                                                                                                 /
// 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                               /
//                                                                                                 /
// You can contact us via: support@intellectualsites.com                                           /
////////////////////////////////////////////////////////////////////////////////////////////////////

package com.intellectualcrafters.plot.uuid;

import com.google.common.collect.ImmutableList;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;

import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.Callable;

/**
 * Name Fetcher Class From Bukkit
 */
public class NameFetcher implements Callable<Map<UUID, String>> {
    private static final String PROFILE_URL = "https://sessionserver.mojang.com/session/minecraft/profile/";
    private final JSONParser jsonParser = new JSONParser();
    private final List<UUID> uuids;

    public NameFetcher(final List<UUID> uuids) {
        this.uuids = ImmutableList.copyOf(uuids);
    }

    @Override
    public Map<UUID, String> call() throws Exception {
        final Map<UUID, String> uuidStringMap = new HashMap<>();
        for (final UUID uuid : this.uuids) {
            if (uuidStringMap.containsKey(uuid)) {
                continue;
            }
            final HttpURLConnection connection = (HttpURLConnection) new URL(
                    PROFILE_URL + uuid.toString().replace("-", "")).openConnection();
            final JSONObject response = (JSONObject) this.jsonParser
                    .parse(new InputStreamReader(connection.getInputStream()));
            final String name = (String) response.get("name");
            if (name == null) {
                continue;
            }
            final String cause = (String) response.get("cause");
            final String errorMessage = (String) response.get("errorMessage");
            if ((cause != null) && (cause.length() > 0)) {
                throw new IllegalStateException(errorMessage);
            }
            uuidStringMap.put(uuid, name);
        }
        return uuidStringMap;
    }
}