taverna-renderers-impl/src/main/java/org/apache/taverna/renderers/impl/TextXMLRenderer.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.renderers.impl;

import static org.apache.taverna.renderers.impl.RendererConstants.SEE_LOG_MSG;

import java.nio.file.Path;
import java.util.regex.Pattern;

import javax.swing.JComponent;
import javax.swing.JTextArea;

import org.apache.taverna.renderers.RendererUtils;

/**
 * Viewer to display XML as a tree.
 * 
 * @author Matthew Pocock
 * @auhor Ian Dunlop
 * @author David Withers
 */
public class TextXMLRenderer extends AbstractRenderer {
	private static final String UNREADABLE_MSG = "Reference Service failed to render data as string " + SEE_LOG_MSG;
	private static final String RENDERER_FAILED_MSG = "Failed to create XML renderer " + SEE_LOG_MSG;
	private Pattern pattern;

	public TextXMLRenderer() {
		pattern = Pattern.compile(".*text/xml.*");
	}

	public boolean isTerminal() {
		return true;
	}

	@Override
	public boolean canHandle(String mimeType) {
		return pattern.matcher(mimeType).matches();
	}

	@Override
	public String getType() {
		return "XML tree";
	}

	@Override
	protected String getSizeQueryTitle() {
		return "Render this as XML?";
	}

	@Override
	public JComponent getRendererComponent(Path path) {
		String resolve = null;
		try {
			// Resolve it as a string
			resolve = RendererUtils.getString(path);
		} catch (Exception ex) {
			logger.error("unrenderable: Reference Service failed to render data as string",
					ex);
			return new JTextArea(UNREADABLE_MSG + ex.getMessage());
		}
		try {
			return new XMLTree(resolve);
		} catch (Exception e) {
			logger.error("unrenderable: failed to create XML renderer", e);
			return new JTextArea(RENDERER_FAILED_MSG + e.getMessage());
		}
	}
}