taverna-uibuilder/src/main/java/org/apache/taverna/lang/uibuilder/Icons.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.taverna.lang.uibuilder;

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

import javax.swing.ImageIcon;

import org.apache.log4j.Logger;

/**
 * Manage icons for the UIBuilder
 * 
 * @author Tom Oinn
 * 
 */
public abstract class Icons {

	private static Logger logger = Logger
	.getLogger(Icons.class);

	private static Map<String, ImageIcon> icons;

	static {
		icons = new HashMap<String, ImageIcon>();
	}

	static synchronized ImageIcon getIcon(String iconName) {
		String iconNameLC = iconName.toLowerCase();
		if (!icons.containsKey(iconNameLC)) {
			try {
				URL iconURL = Icons.class.getResource(iconName + ".png");
				icons.put(iconNameLC, new ImageIcon(iconURL));
			} catch (Exception ex) {
				logger.error("Unable to get icon resource", ex);
			}
		}
		return icons.get(iconNameLC);
	}

}