XMLLoader.java

/*
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser 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
 * Lesser General Public License along with this program. If not, see
 * <http://www.gnu.org/licenses/>
 */
package net.slimevoid.library.util.xml;

import net.slimevoid.library.core.lib.CoreLib;
import net.slimevoid.library.data.Logger;
import net.slimevoid.library.data.LoggerSlimevoidLib;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.io.File;
import java.io.FilenameFilter;
import java.util.HashMap;
import java.util.Map;

public abstract class XMLLoader {
    /**
     * Variable mapping.
     */
    protected static Map<String, Integer> xmlVariables = new HashMap<String, Integer>();

    /**
     * Filename filter. Used for filtering out other files than XML files.
     */
    protected static FilenameFilter filter = new FilenameFilter() {
        @Override
        public boolean accept(File dir, String name) {
            return name.substring(name.length() - 4,
                    name.length()).equals(".xml");
        }
    };

    private static int getInteger(String value) {
        int returns;
        try {
            returns = Integer.parseInt(value);
        } catch (NumberFormatException e) {
            return -1;
        }
        return returns;
    }

    /**
     * Add a XML variable mapping. Variable name can be used in XML files
     * instead of IDs.
     *
     * @param var Variable name.
     * @param val Variable value.
     * @return
     */
    public static void addXmlVariable(String var, int val) {
        if (xmlVariables.containsKey(var)) {
            for (int i = 1; i < 4096; i++) {
                String tempVar = var + i;
                if (!xmlVariables.containsKey(tempVar)) {
                    var += i;
                    break;
                }
            }
        }
        Integer flag = xmlVariables.put(var,
                val);

        if (flag != null) {
            LoggerSlimevoidLib.getInstance(CoreLib.MOD_NAME).write(
                    false,
                    "XML Variable replaced ID [" + flag
                            + "] with ID [" + val
                            + "] and mapped to ",
                    Logger.LogLevel.DEBUG);
        } else {
            LoggerSlimevoidLib.getInstance(CoreLib.MOD_NAME).write(
                    false,
                    "XML Variable loaded for [" + var + "] @ID ["
                            + val + "]",
                    Logger.LogLevel.DEBUG);
        }
    }

    /**
     * Fetches a value with set tag from a element node.
     *
     * @param tag     Tag name.
     * @param element Element node.
     * @return The tag's value.
     */
    protected static String getValue(String tag, Element element) {
        NodeList nodes = element.getElementsByTagName(tag).item(0).getChildNodes();
        Node node = nodes.item(0);
        return node.getNodeValue();
    }
}