This is the mavenized version of the project, and it's the one I'll be working with from now on.

git-svn-id: https://j8583.svn.sourceforge.net/svnroot/j8583/j8583@52 db60a039-f72e-0410-b1d2-baa000846441
2010-11-26 00:30:40 +00:00
commit 1b07cf9a32
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+/*
+j8583 A Java implementation of the ISO8583 protocol
+Copyright (C) 2007 Enrique Zamudio Lopez
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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 library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+*/
+package com.solab.iso8583.impl;
+
+import com.solab.iso8583.TraceNumberGenerator;
+
+/** Simple implementation of a TraceNumberGenerator with an internal
+ * number that is increased in memory but is not stored anywhere.
+ * 
+ * @author Enrique Zamudio
+ */
+public class SimpleTraceGenerator implements TraceNumberGenerator {
+
+	private int value = 0;
+
+	/** Creates a new instance that will use the specified initial value. This means
+	 * the first nextTrace() call will return this number.
+	 * @param initialValue a number between 1 and 999999.
+	 * @throws IllegalArgumentException if the number is less than 1 or greater than 999999. */
+	public SimpleTraceGenerator(int initialValue) {
+		if (initialValue < 1 || initialValue > 999999) {
+			throw new IllegalArgumentException("Initial value must be between 1 and 999999");
+		}
+		value = initialValue - 1;
+	}
+
+	public int getLastTrace() {
+		return value;
+	}
+
+	/** Returns the next number in the sequence. This method is synchronized, because the counter
+	 * is incremented in memory only. */
+	public synchronized int nextTrace() {
+		value++;
+		if (value > 999999) {
+			value = 1;
+		}
+		return value;
+	}
+
+}