taverna-xpath-activity-ui/src/main/java/org/apache/taverna/activities/xpath/ui/servicedescription/XPathActivityIcon.java

package org.apache.taverna.activities.xpath.ui.servicedescription;
/*
 * 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.
 */

import java.awt.Color;
import java.net.URI;

import javax.swing.Icon;
import javax.swing.ImageIcon;

import org.apache.taverna.workbench.activityicons.ActivityIconSPI;
import org.apache.taverna.workbench.configuration.colour.ColourManager;

/**
 * @author Sergejs Aleksejevs
 */
public class XPathActivityIcon implements ActivityIconSPI {
	private static final Color PROCESSOR_COLOUR = Color.decode("#E6FF5E");

	// --- LOCATIONS OF ICONS USED IN THE XPath ACTIVITY ---

	/* from famfamfam-silk webjar
	 * http://www.famfamfam.com/lab/icons/silk/
	 */
	private static final String FAMFAMFAM_SILK_PATH = "/META-INF/resources/webjars/famfamfam-silk/1.3/icons/";

	public static final String XPATH_ACTIVITY_ICON = FAMFAMFAM_SILK_PATH + "page_white_code.png";
	public static final String XPATH_ACTIVITY_CONFIGURATION_PARSE_XML_ICON = FAMFAMFAM_SILK_PATH + "arrow_right.png";

	public static final String XML_TREE_ROOT_ICON = FAMFAMFAM_SILK_PATH + "page_white_code.png";
	public static final String XML_TREE_NODE_ICON = FAMFAMFAM_SILK_PATH + "tag.png";
	public static final String XML_TREE_ATTRIBUTE_ICON = FAMFAMFAM_SILK_PATH +  "textfield.png";

	public static final String XML_TREE_EXPAND_ALL_ICON = FAMFAMFAM_SILK_PATH
			+ "folder_explore.png";
	public static final String XML_TREE_COLLAPSE_ALL_ICON = FAMFAMFAM_SILK_PATH
			+ "folder.png"; 

	public static final String XPATH_STATUS_OK_ICON = FAMFAMFAM_SILK_PATH + "accept.png";
	public static final String XPATH_STATUS_ERROR_ICON = FAMFAMFAM_SILK_PATH + "exclamation.png";
	public static final String XPATH_STATUS_UNKNOWN_ICON = FAMFAMFAM_SILK_PATH + "help.png";

	public static final String FOLD_ICON = FAMFAMFAM_SILK_PATH + "text_indent.png";
	public static final String UNFOLD_ICON = FAMFAMFAM_SILK_PATH + "text_indent_remove.png";

	// ------

	private static ImageIcon icon;

	public int canProvideIconScore(URI activityType) {
		if (XPathTemplateService.ACTIVITY_TYPE.equals(activityType))
			return DEFAULT_ICON + 1;
		else
			return NO_ICON;
	}

	public Icon getIcon(URI activityType) {
		return getXPathActivityIcon();
	}

	public static Icon getXPathActivityIcon() {
		if (icon == null) {
			synchronized (XPathActivityIcon.class) {
				if (icon == null) {
					try {
						icon = new ImageIcon(
								XPathActivityIcon.class.getResource(XPATH_ACTIVITY_ICON));
					} catch (NullPointerException e) {
						/* icon wasn't found - do nothing, but no icon will be available */
					}
				}
			}
		}
		return (icon);
	}

	public static Icon getIconById(String iconID) {
		try {
			return (new ImageIcon(XPathActivityIcon.class.getResource(iconID)));
		} catch (NullPointerException e) {
			// requested icon wasn't found - just return null
			return (null);
		}
	}

	public void setColourManager(ColourManager colourManager) {
		colourManager.setPreferredColour(XPathTemplateService.ACTIVITY_TYPE.toString(), PROCESSOR_COLOUR);
	}

}