com.griefcraft.util.Closer.java Source code

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Here is the source code for com.griefcraft.util.Closer.java

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/**
 * SwornAPI - common API for MineSworn and Shadowvolt plugins
 * Copyright (C) 2015 dmulloy2
 *
 * 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.griefcraft.util;

import java.io.Closeable;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.lang.Validate;

/**
 * Automatically closes a collection of closeable objects.
 * 
 * @author dmulloy2
 */

public class Closer implements Closeable {
    private final List<AutoCloseable> list = new ArrayList<>();

    /**
     * Registers a closeable object.
     *
     * @param closeable Object to register
     * @return The object
     */
    public final <C extends AutoCloseable> C register(C closeable) {
        Validate.notNull(closeable, "closeable cannot be null!");

        list.add(closeable);
        return closeable;
    }

    @Override
    public final void close() {
        if (list.isEmpty())
            return;

        Iterator<AutoCloseable> iter = list.iterator();
        while (iter.hasNext()) {
            closeQuietly(iter.next());
            iter.remove();
        }
    }

    /**
     * Quietly closes a closeable object, ignoring all exceptions.
     * 
     * @param closeable Object to close
     */
    public static void closeQuietly(AutoCloseable closeable) {
        try {
            if (closeable != null)
                closeable.close();
        } catch (Throwable ex) {
        }
    }
}