org.xBaseJ.Message Maven / Gradle / Ivy

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/**
 * eobjects.org MetaModel
 * Copyright (C) 2010 eobjects.org
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */

package org.xBaseJ;


import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.util.Vector;

/**
 * This class is courtesy of the xBaseJ project: http://xbasej.sourceforge.net/
 * 
 * Copyright 1997-2007 - American Coders, LTD - Raleigh NC USA
 * 
 *  * American Coders, Ltd
 * P. O. Box 97462
 * Raleigh, NC  27615  USA
 * 1-919-846-2014
 * http://www.americancoders.com
 * 
 * 
 * @author Joe McVerry, American Coders Ltd.
 */
public class Message {

	private Vector idVector;
	private Vector dataVector;

	/**
	 * creates a message class used by the client/server objects
	 */

	public Message() {
		idVector = new Vector();
		dataVector = new Vector();
	}

	/**
	 * creates a message class used by the client/server objects
	 * 
	 * @param InStream
	 *            data input
	 * @throws IOException
	 *             communication line error
	 * @throws xBaseJException
	 *             error conversing with server
	 */

	public Message(DataInputStream InStream) throws IOException,
			xBaseJException {
		int dataLen, j, i;
		int waitLen;
		String inString;
		dataLen = 0;

		do {
			waitLen = InStream.available();
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
			} finally {
			}
		} while (waitLen < 4);

		try {
			dataLen = InStream.readInt();
		} catch (EOFException e) {
			System.out.println("caught a " + e.getMessage());
		}

		finally {
		}

		byte DataIn[] = new byte[dataLen];
		waitLen = dataLen;

		InStream.readFully(DataIn, 0, dataLen);

		idVector = new Vector();
		dataVector = new Vector();

		for (i = 0; i < dataLen;) {
			for (j = i; j < dataLen && DataIn[j] != 0; j++)
				;
			// 1.0inString = new String(DataIn, 0, i, j-i);
			inString = new String(DataIn, i, j - i);
			idVector.addElement(inString);
			i = j + 1;
			for (j = i; j < dataLen && DataIn[j] != 0; j++)
				;
			// 1.0 inString = new String(DataIn, 0, i, j-i);
			inString = new String(DataIn, i, j - i);
			dataVector.addElement(inString);
			i = j + 1;
		}

		inString = (String) idVector.elementAt(0);
		if (inString.compareTo("Exception") == 0) {
			inString = (String) dataVector.elementAt(0);
			throw new xBaseJException(inString);
		}
		if (inString.compareTo("xBaseJException") == 0) {
			inString = (String) dataVector.elementAt(0);
			throw new xBaseJException(inString);
		}

	}

	/**
	 * writes to the queue
	 * 
	 * @param OutStream
	 *            data output
	 * @throws IOException
	 *             communication line error
	 */
	public void write(DataOutputStream OutStream) throws IOException {

		String tString;
		int i, outLength = 0;
		byte dataByteOut[];
		for (i = 0; i < idVector.size(); i++) {
			tString = (String) idVector.elementAt(i);
			outLength += tString.length();
			tString = (String) dataVector.elementAt(i);
			outLength += tString.length();
			outLength += 2;
		}

		OutStream.writeInt(outLength);

		for (i = 0; i < idVector.size(); i++) {

			tString = (String) idVector.elementAt(i);
			dataByteOut = new byte[tString.length()];

			// 1.0 tString.getBytes(0, tString.length(), dataByteOut, 0);
			dataByteOut = tString.getBytes();

			// 1.0tString.getBytes(0, tString.length(), dataByteOut, 0);
			dataByteOut = tString.getBytes();

			OutStream.write(dataByteOut, 0, tString.length());
			OutStream.writeByte(0);
			tString = (String) dataVector.elementAt(i);
			dataByteOut = new byte[tString.length()];

			// 1.0 tString.getBytes(0, tString.length(), dataByteOut, 0);
			dataByteOut = tString.getBytes();

			OutStream.write(dataByteOut, 0, tString.length());
			OutStream.writeByte(0);
		}

		OutStream.flush();

	}

	/**
	 * set header information
	 */
	public void setHeader(String ID, String DBFName) {
		if (idVector.size() == 0) {
			idVector.addElement(ID);
			dataVector.addElement(DBFName);
		} else {
			idVector.setElementAt(ID, 0);
			dataVector.setElementAt(DBFName, 0);
		}
		return;
	}

	public void setField(String ID, String FieldData) {
		int i;
		String idt;
		for (i = 1; i < idVector.size(); i++) {
			idt = (String) idVector.elementAt(i);
			if (idt.compareTo(ID) == 0) {
				dataVector.setElementAt(FieldData, i);
				return;
			}
		}
		idVector.addElement(ID);
		dataVector.addElement(FieldData);
		return;
	}

	public void setException(String ID, String FieldData) {
		idVector.removeAllElements();
		dataVector.removeAllElements();
		idVector.addElement(ID);
		dataVector.addElement(FieldData);
		return;
	}

	public String getID(int i) {
		return (String) idVector.elementAt(i);
	}

	public String getField(String ID) throws xBaseJException {
		int i;
		String idt;
		for (i = 0; i < idVector.size(); i++) {
			idt = (String) idVector.elementAt(i);
			if (idt.compareTo(ID) == 0) {
				return (String) dataVector.elementAt(i);
			}
		}

		throw new xBaseJException("Field " + ID + " not found");

	}

	public String getField(int pos) throws xBaseJException {
		return (String) dataVector.elementAt(pos);

	}

	public int getCount() {
		return dataVector.size();
	}

}