/*
 * Copyright (c) 2010, Sven Gothel
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Sven Gothel nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Sven Gothel BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Created on Saturday, March 27 2010 11:55
 */
package com.jogamp.common.nio;

import com.jogamp.common.os.*;

import java.nio.ByteBuffer;
import java.nio.Buffer;
import java.util.HashMap;

/**
 * @author Michael Bien
 * @author Sven Gothel
 */
public abstract class AbstractBuffer implements NativeBuffer {

    protected final ByteBuffer bb;
    protected int capacity;
    protected int position;

    static {
        NativeLibrary.ensureNativeLibLoaded();
    }

    protected AbstractBuffer(ByteBuffer bb, int elementSize) {
        this.bb = bb;

        capacity = bb.capacity() / elementSize;
        position = 0;
    }

    public final int limit() {
        return capacity;
    }

    public final int capacity() {
        return capacity;
    }

    public final int position() {
        return position;
    }

    public final NativeBuffer position(int newPos) {
        if (0 > newPos || newPos >= capacity) {
            throw new IndexOutOfBoundsException("Sorry to interrupt, but the position "+newPos+" was out of bounds. " +
                                                "My capacity is "+capacity()+".");
        }
        position = newPos;
        return this;
    }

    public final int remaining() {
        return capacity - position;
    }

    public final boolean hasRemaining() {
        return position < capacity;
    }

    public final NativeBuffer rewind() {
        position = 0;
        return this;
    }

    public boolean hasArray() {
        return false;
    }

    public int arrayOffset() {
        return 0;
    }

    public final ByteBuffer getBuffer() {
        return bb;
    }

    public final boolean isDirect() {
        return bb.isDirect();
    }

    public String toString() {
        return "AbstractBuffer[capacity "+capacity+", position "+position+", elementSize "+(bb.capacity()/capacity)+", ByteBuffer.capacity "+bb.capacity()+"]";
    }

}