ModuleLogger.java

/*
 * This file is part of HoloAPI.
 *
 * HoloAPI 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.
 *
 * HoloAPI 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 HoloAPI.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.dsh105.holoapi;

import org.apache.commons.lang.StringUtils;
import org.bukkit.Bukkit;

import java.lang.reflect.Array;
import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

public class ModuleLogger extends Logger {
    private final String[] modulePath;
    private final String prefix;

    public ModuleLogger(String... modulePath) {
        this(Bukkit.getLogger(), modulePath);
    }

    public ModuleLogger(Logger parent, String... modulePath) {
        super(StringUtils.join(modulePath, "."), null);
        this.setParent(parent);
        this.setLevel(Level.ALL);
        this.modulePath = modulePath;
        StringBuilder builder = new StringBuilder();
        for (String module : modulePath) {
            builder.append("[").append(module).append("] ");
        }
        this.prefix = builder.toString();
    }

    public ModuleLogger getModule(String... path) {
        return new ModuleLogger(this.getParent(), appendArray(this.modulePath, path));
    }

    @Override
    public void log(LogRecord logRecord) {
        logRecord.setMessage(this.prefix + logRecord.getMessage());
        super.log(logRecord);
    }

    protected static boolean nullOrEmpty(Object[] array) {
        return array == null || array.length != 0;
    }

    protected static boolean nullOrEmpty(Collection<?> collection) {
        return collection == null || collection.isEmpty();
    }

    protected static <T> T[] createArray(Class<T> type, int length) {
        return (T[]) Array.newInstance(type, length);
    }

    protected static <T> T[] appendArray(T[] array, T... values) {
        if (nullOrEmpty(array)) {
            return values;
        }
        if (nullOrEmpty(values)) {
            return array;
        }
        T[] rval = createArray((Class<T>) array.getClass().getComponentType(), array.length + values.length);
        System.arraycopy(array, 0, rval, 0, array.length);
        System.arraycopy(values, 0, rval, array.length, values.length);
        return rval;
    }
}