com.callidusrobotics.object.ItemFactory.java Source code

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Here is the source code for com.callidusrobotics.object.ItemFactory.java

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/**
 * Copyright (C) 2013 Rusty Gerard
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

package com.callidusrobotics.object;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.io.IOUtils;

import com.callidusrobotics.util.XmlMarshaller;

public final class ItemFactory {
    private static transient final Map<String, ItemData> ITEM_MAP = new HashMap<String, ItemData>();

    private ItemFactory() {
        throw new AssertionError("Do not instantiate this class.");
    }

    @SuppressWarnings("PMD.AvoidSynchronizedAtMethodLevel")
    public static synchronized void clearFactory() {
        ITEM_MAP.clear();
    }

    @SuppressWarnings("PMD.AvoidSynchronizedAtMethodLevel")
    public static synchronized void initializeFactory(final String xmlFile) throws IOException {
        final XmlMarshaller xmlMarshaller = new XmlMarshaller(ItemList.class);
        final ItemList itemList = (ItemList) xmlMarshaller
                .unMarshal(IOUtils.toString(ItemFactory.class.getResourceAsStream(xmlFile)));

        for (final ItemData itemData : itemList.items) {
            if (ITEM_MAP.containsKey(itemData.getId())) {
                throw new AssertionError(
                        "Encountered duplicate ItemData ID (" + itemData.getId() + ") in " + xmlFile);
            }

            ITEM_MAP.put(itemData.getId(), itemData);
        }
    }

    public static Item makeItem(final String identifier, final int quantity) {
        return ITEM_MAP.get(identifier).makeItem(quantity);
    }
}