EBCDICMessageRenderer.java

package hermes.renderers;

import hermes.util.DumpUtils;
import hermes.util.MessageUtils;

import java.awt.Font;
import java.io.StringWriter;

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

import org.apache.log4j.Logger;

/**
 * A renderer that displays EBCDIC Data in ASCII Format on a JMS message in a
 * text area.
 * 
 * @author sxchapma@yahoo.com
 * @version $Id: EBCDICRenderer.java,v 1.0 2008/10/03 15:59:54
 */

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

	private static String MAX_MESSAGE_SIZE = "maxMessageSize";
	private static String MAX_MESSAGE_SIZE_INFO = "Maximum message size";
	private static String UNDISPLAYABLE_CHAR = ".";
	private static String ROW_LENGTH = "rowLength";
	private static String ROW_LENGTH_INFO = "Row length to display on screen";
	private static String UNDISPLAYABLE_CHAR_INFO = "Character to display when the EBCDIC character cannot be represented in ASCII";

	public static final int DUMP_AS_EBCDIC = 5;
	public char[] chart = null;

	public MyConfig config = new MyConfig();

	static {

	}

	public class MyConfig extends AbstractMessageRenderer.BasicConfig {
		private int maxMessageSize = 5 * 1024 * 1024;;
		private int rowLength = 16;
		private boolean active = false;
		private String name = "EBCDIC";
		private String undisplayableChar = ".";

		@Override
		public String getName() {
			return name;
		}

		@Override
		public String getPropertyDescription(String propertyName) {
			if (MAX_MESSAGE_SIZE.equals(propertyName)) {
				return MAX_MESSAGE_SIZE_INFO;
			}

			if (ROW_LENGTH.equals(propertyName)) {
				return ROW_LENGTH_INFO;
			}

			if (UNDISPLAYABLE_CHAR.equals(propertyName)) {
				return UNDISPLAYABLE_CHAR_INFO;
			}

			return propertyName;
		}

		public String getUndisplayableChar() {
			return undisplayableChar;
		}

		public void setUndisplayableChar(String undisplayableChar) {
			this.undisplayableChar = undisplayableChar;
		}

		@Override
		public boolean isActive() {
			return active;
		}

		@Override
		public void setActive(boolean active) {
			this.active = active;
		}

		@Override
		public void setName(String name) {
			this.name = name;
		}

		public int getMaxMessageSize() {
			return maxMessageSize;
		}

		public void setMaxMessageSize(int maxMessageSize) {
			this.maxMessageSize = maxMessageSize;
		}

		public int getRowLength() {
			return rowLength;
		}

		public void setRowLength(int rowLength) {
			this.rowLength = rowLength;
		}

	}

	public EBCDICMessageRenderer() {
		super();

	}

	@Override
	public Config createConfig() {
		return new MyConfig();
	}

	@Override
	public void setConfig(Config config) {
		this.config = (MyConfig) config;

		updateMappings();

		super.setConfig(config);
	}

	private void updateMappings() {
		chart = new char[255];

		for (int i = 0; i < 255; i++) {
			chart[i] = config.getUndisplayableChar().charAt(0);
		}
		chart[64] = ' ';
		chart[76] = '<';
		chart[77] = '(';
		chart[78] = '+';
		chart[79] = '|';
		chart[80] = '&';
		chart[90] = '!';
		chart[91] = '$';
		chart[92] = '*';
		chart[93] = ')';
		chart[94] = ';';
		chart[95] = '_';
		chart[96] = '-';
		chart[97] = '/';
		chart[107] = ',';
		chart[108] = '%';
		chart[109] = '_';
		chart[110] = '>';
		chart[111] = '?';
		chart[122] = ':';
		chart[123] = '#';
		chart[124] = '@';
		chart[125] = '`';
		chart[126] = '=';
		chart[127] = '\"';
		chart[129] = 'a';
		chart[130] = 'b';
		chart[131] = 'c';
		chart[132] = 'd';
		chart[133] = 'e';
		chart[134] = 'f';
		chart[135] = 'g';
		chart[136] = 'h';
		chart[137] = 'i';
		chart[145] = 'j';
		chart[146] = 'k';
		chart[147] = 'l';
		chart[148] = 'm';
		chart[149] = 'n';
		chart[150] = 'o';
		chart[151] = 'p';
		chart[152] = 'q';
		chart[153] = 'r';
		chart[162] = 's';
		chart[163] = 't';
		chart[164] = 'u';
		chart[165] = 'v';
		chart[166] = 'w';
		chart[167] = 'x';
		chart[168] = 'y';
		chart[169] = 'z';
		chart[193] = 'A';
		chart[194] = 'B';
		chart[195] = 'C';
		chart[196] = 'D';
		chart[197] = 'E';
		chart[198] = 'F';
		chart[199] = 'G';
		chart[200] = 'H';
		chart[201] = 'I';
		chart[209] = 'J';
		chart[210] = 'K';
		chart[211] = 'L';
		chart[212] = 'M';
		chart[213] = 'N';
		chart[214] = 'O';
		chart[215] = 'P';
		chart[216] = 'Q';
		chart[217] = 'R';
		chart[226] = 'S';
		chart[227] = 'T';
		chart[228] = 'U';
		chart[229] = 'V';
		chart[230] = 'W';
		chart[231] = 'X';
		chart[232] = 'Y';
		chart[233] = 'Z';
		chart[240] = '0';
		chart[241] = '1';
		chart[242] = '2';
		chart[243] = '3';
		chart[244] = '4';
		chart[245] = '5';
		chart[246] = '6';
		chart[247] = '7';
		chart[248] = '8';
		chart[249] = '9';
	}

	@Override
	public JComponent render(JScrollPane parent, Message m) {

		final JTextArea myRender = new JTextArea();

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

		byte[] messagebytes = null;

		try {
			messagebytes = MessageUtils.asBytes(m);
		} catch (Exception j) {
			log.error(j.getMessage(), j);
		}

		try {
			myRender.setText(dumpBinaryEx(messagebytes, DUMP_AS_EBCDIC, config.getMaxMessageSize()));
			myRender.setCaretPosition(0);
		} catch (Exception e) {
			log.error(e.getMessage(), e);
		}

		return myRender;
	}

	private String dumpBinaryEx(byte[] data, int mode, int maxSize) {
		StringWriter b = new StringWriter();

		int c = 0;

		if (data != null) {
			while (c < data.length) {
				int max = Math.min(config.getRowLength(), data.length - c);

				byte[] row = new byte[max];
				for (int i = 0; i < row.length; i++)
					row[i] = data[c + i];

				switch (mode) {
				case DUMP_AS_EBCDIC:
					DumpUtils.dumpBinaryLineAsHexAndEBCDIC(b, c, chart, row, config.getRowLength());
					break;
				}
				c += config.getRowLength();

				if (c > maxSize) {
					b.append("Message too big");
					break;
				}
			}
		} else {
			b.append("No payload.");
		}

		return b.toString();
	}

	/**
	 * Any JMS message is readable.
	 */
	@Override
	public boolean canRender(Message message) {
		return true;
	}

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