/**
 * @author Dalton (Palidino)
 */
package com.palidino.nio;

import java.nio.ByteBuffer;

public class WriteEvent {
    private ByteBuffer buffer;
    private WriteEventHandler handler;

    public WriteEvent(byte[] original, int offset, int length, WriteEventHandler handler) {
        if (original == null) {
            throw new NullPointerException("original can't be null");
        }
        if (offset < 0 || length < 0) {
            throw new NegativeArraySizeException("offset and length must be greater than 0");
        }
        if (offset > original.length || length + offset > original.length) {
            throw new ArrayIndexOutOfBoundsException("length + offset can't be greater than original.length");
        }
        if (original.length == 0 || length == 0) {
            throw new IllegalArgumentException("length must be greater than 0");
        }
        buffer = ByteBuffer.allocateDirect(length);
        buffer.put(original, offset, length);
        buffer.flip();
        buffer = buffer.asReadOnlyBuffer();
        this.handler = handler;
    }

    public WriteEvent(ByteBuffer original, WriteEventHandler handler) {
        buffer = ByteBuffer.allocateDirect(original.capacity());
        ByteBuffer readOnlyCopy = original.asReadOnlyBuffer();
        readOnlyCopy.flip();
        buffer.put(readOnlyCopy);
        buffer.flip();
        buffer = buffer.asReadOnlyBuffer();
        this.handler = handler;
    }

    ByteBuffer getBuffer() {
        return buffer;
    }

    WriteEventHandler getHandler() {
        return handler;
    }
}