iconfactory.java

ULCeclipse的插件集成的swing的框架

package com.canoo.ulc.onlineshop.util;

import com.ulcjava.base.application.ApplicationContext;
import com.ulcjava.base.application.util.ULCIcon;

import java.net.URL;
import java.util.HashMap;
import java.util.Map;

/**
 * This class provides icons. The icons are reused within each session.
 * <p/>
 * Note: This class is not synchronized and should only be called from the ULC Thread.
 *
 * @author [e-mail]
 */
abstract public class IconFactory {
    private static final String ICON_MAP = "SESSION_LOCAL_ICON_MAP";

    public static ULCIcon getIcon(String name) {
        if(!name.startsWith("/")) {
            name = "/" + name;
        }

        if (!containsIcon(name)) {
            URL resource = IconFactory.class.getResource(name);

            if (resource != null) {
                putIcon(name, new ULCIcon(resource));
            }
        }

        return (ULCIcon)getIcons().get(name);
    }


    private static void putIcon(String name, ULCIcon icon) {
        getIcons().put(name, icon);
    }

    private static boolean containsIcon(String name) {
        return getIcons().containsKey(name);
    }

    private static Map getIcons() {
        Map icons = (Map)ApplicationContext.getAttribute(ICON_MAP);
        if (icons == null) {
            icons = new HashMap();
            ApplicationContext.setAttribute(ICON_MAP, icons);
        }
        return icons;
    }


    private IconFactory() {
    }
}