/*
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,  
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.switchyard.common.io;

import java.io.BufferedInputStream;

/**
 * Buffer utilities.
 *
 * @author David Ward &lt;<a href="mailto:dward@jboss.org">dward@jboss.org</a>&gt; &copy; 2012 Red Hat Inc.
 */
public final class Buffers {

    /**
     * The platform-default buffer size.
     */
    public static final int DEFAULT_SIZE = new DefaultSize().get();

    private Buffers() {};

    private static final class DefaultSize extends BufferedInputStream {
        private DefaultSize() {
            super(null);
        }
        private int get() {
            return super.buf.length;
        }
    }

    /**
     * Creates an empty byte array for buffering purposes, using the platform-default buffer size.
     * @return the empty byte array
     */
    public static byte[] newDefaultBuffer() {
        return new byte[DEFAULT_SIZE];
    }

    /**
     * Prints defaults.
     * @param args ignored
     */
    public static void main(String... args) {
        System.out.println("DEFAULT_SIZE = " + DEFAULT_SIZE);
    }

}
