/*
 * Copyright (c) 2014, grossmann
 * 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 the jo-widgets.org 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 jo-widgets.org 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.
 */

package org.jowidgets.spi.impl.image;

import org.jowidgets.spi.image.IImageSpi;
import org.jowidgets.util.Assert;

public abstract class AbstractImageSpiImpl<IMAGE_TYPE> implements IImageSpi {

    private ImageHandle<? extends IMAGE_TYPE> imageHandle;
    private boolean disposed;

    public AbstractImageSpiImpl(final ImageHandle<? extends IMAGE_TYPE> imageHandle) {

        Assert.paramNotNull(imageHandle, "imageHandle");

        this.imageHandle = imageHandle;
        this.disposed = false;
    }

    @Override
    public void dispose() {
        checkDisposed();
        if (!disposed && !imageHandle.isDisposed()) {
            imageHandle.dispose();
            imageHandle = null;
        }
        disposed = true;
    }

    @SuppressWarnings("unchecked")
    @Override
    public ImageHandle<IMAGE_TYPE> getImageHandle() {
        checkDisposed();
        return (ImageHandle<IMAGE_TYPE>) imageHandle;
    }

    protected void checkDisposed() {
        if (disposed) {
            throw new IllegalStateException("Image is disposed");
        }
    }
}