name.martingeisse.wicket.component.sprite.SpriteAtlas.java Source code

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Here is the source code for name.martingeisse.wicket.component.sprite.SpriteAtlas.java

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/**
 * Copyright (c) 2010 Martin Geisse
 *
 * This file is distributed under the terms of the MIT license.
 */

package name.martingeisse.wicket.component.sprite;

import org.apache.wicket.Application;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.request.resource.ByteArrayResource;
import org.apache.wicket.request.resource.ResourceReference;

/**
 * The atlas that contains a number of sprites.
 */
public final class SpriteAtlas {

    /**
     * the name
     */
    private final String name;

    /**
     * the resource
     */
    private final ByteArrayResource resource;

    /**
     * Constructor. This also registers a shared resource for the atlas using the
     * {@link SpriteAtlas} class and provided name.
     */
    SpriteAtlas(String name, String contentType, byte[] data) {
        this.name = name;
        this.resource = new ByteArrayResource(contentType, data);
        Application.get().getSharedResources().add(SpriteAtlas.class, name, null, null, null, resource);
    }

    /**
     * Getter method for the resource.
     * @return the resource
     */
    public ByteArrayResource getResource() {
        return resource;
    }

    /**
     * Returns the URL for the atlas image, using the application associated with the calling thread.
     * @return the URL
     */
    public CharSequence getUrl() {
        ResourceReference resourceReference = Application.get().getSharedResources().get(SpriteAtlas.class, name,
                null, null, null, true);
        return RequestCycle.get().urlFor(resourceReference, null);
    }

}