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

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Here is the source code for name.martingeisse.wicket.component.sprite.ApplicationSpriteSupport.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.MetaDataKey;

/**
 * Glue code between the CSS sprite code and the Wicket application.
 */
public final class ApplicationSpriteSupport {

    /**
     * The metadata key for this object.
     */
    public static final MetaDataKey<ApplicationSpriteSupport> KEY = new MetaDataKey<ApplicationSpriteSupport>() {
    };

    /**
     * Initializes sprite support for the specified application.
     * @param application the Wicket application
     */
    public static void initialize(Application application) {
        application.setMetaData(KEY, new ApplicationSpriteSupport());
    }

    /**
     * Returns the sprite support object for the application of the calling thread,
     * or null if none is associated with that application.
     * 
     * @return the sprite support object
     */
    public static ApplicationSpriteSupport get() {
        return get(Application.get());
    }

    /**
     * Returns the sprite support object for the specified application, or null if none
     * is associated with the application.
     * 
     * @param application the Wicket application
     * @return the sprite support object
     */
    public static ApplicationSpriteSupport get(Application application) {
        return application.getMetaData(KEY);
    }

    /**
     * the spriteRegistry
     */
    private final SpriteRegistry spriteRegistry;

    /**
     * Prevent instantiation.
     */
    private ApplicationSpriteSupport() {
        this.spriteRegistry = new SpriteRegistry();
    }

    /**
     * Getter method for the spriteRegistry.
     * @return the spriteRegistry
     */
    public SpriteRegistry getSpriteRegistry() {
        return spriteRegistry;
    }

}