/* 
 * Copyright 2003,2004,2005 Colin Crist
 *
 * Licensed 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 hermes.renderers;

import hermes.swing.MyTextArea;
import hermes.util.DumpUtils;
import hermes.util.MessageUtils;

import java.awt.Font;

import javax.jms.BytesMessage;
import javax.jms.Message;
import javax.swing.JComponent;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

import org.apache.log4j.Logger;

/**
 * A renderer that converts the message into hex for viewing.
 * 
 * @author colincrist@hermesjms.com
 * @version $Id: HexMessageRenderer.java,v 1.3 2007/02/18 16:13:41 colincrist
 *          Exp $
 */

public class HexMessageRenderer extends AbstractMessageRenderer {
	private static final Logger log = Logger.getLogger(HexMessageRenderer.class);

	public HexMessageRenderer() {
		super();
	}

	@Override
	public JComponent render(JScrollPane parent, Message m) {
		final JTextArea textArea = new MyTextArea();

		textArea.setEditable(false);
		textArea.setFont(Font.decode("Monospaced-PLAIN-12"));

		byte[] bytes = null;

		try {
			bytes = MessageUtils.asBytes(m);
			textArea.setText(DumpUtils.dumpBinary(bytes, DumpUtils.DUMP_AS_HEX_AND_ALPHA));
		} catch (Throwable e) {
			textArea.setText(e.getMessage());

			log.error("exception converting message to byte[]: ", e);
		}

		textArea.setCaretPosition(0);

		return textArea;
	}

	/**
	 * BytesMessages are handled by the DefaultMessageRenderer so no point in
	 * doing it twice.
	 */
	@Override
	public boolean canRender(Message message) {
		return !(message instanceof BytesMessage);
	}

	@Override
	public String getDisplayName() {
		return "Hex";
	}
}