diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/util/Constants.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/util/Constants.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,172 @@
+/**
+ * Copyright (c) 2012, Ben Fortuna
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *  o Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ *  o Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ *  o Neither the name of Ben Fortuna nor the names of any other contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package net.fortuna.ical4j.util;
+
+import net.fortuna.ical4j.model.Property;
+import net.fortuna.ical4j.model.property.Action;
+import net.fortuna.ical4j.model.property.CalScale;
+import net.fortuna.ical4j.model.property.Clazz;
+import net.fortuna.ical4j.model.property.Method;
+import net.fortuna.ical4j.model.property.Priority;
+import net.fortuna.ical4j.model.property.Status;
+import net.fortuna.ical4j.model.property.Transp;
+import net.fortuna.ical4j.model.property.Version;
+
+/**
+ * $Id$
+ *
+ * Created on 5/07/2005
+ *
+ * Provides some convenience methods for working with constant
+ * parameters and properties.
+ * @author Ben Fortuna
+ */
+public final class Constants {
+
+    /**
+     * Constructor made private to enforce static nature.
+     */
+    private Constants() {
+    }
+    
+    /**
+     * Returns a constant equivalent to the specified property
+     * if one is applicable. Otherwise will return the specified
+     * property.
+     * @param property a property instance
+     * @return an equivalent constant property, or the specified property if no equivalent
+     * constant exists
+     */
+    public static Property forProperty(final Property property) {
+        Property retVal = property;
+        if (Action.AUDIO.equals(property)) {
+            retVal = Action.AUDIO;
+        }
+        else if (Action.DISPLAY.equals(property)) {
+            retVal = Action.DISPLAY;
+        }
+        else if (Action.EMAIL.equals(property)) {
+            retVal = Action.EMAIL;
+        }
+        else if (Action.PROCEDURE.equals(property)) {
+            retVal = Action.PROCEDURE;
+        }
+        else if (CalScale.GREGORIAN.equals(property)) {
+            retVal = CalScale.GREGORIAN;
+        }
+        else if (Clazz.CONFIDENTIAL.equals(property)) {
+            retVal = Clazz.CONFIDENTIAL;
+        }
+        else if (Clazz.PRIVATE.equals(property)) {
+            retVal = Clazz.PRIVATE;
+        }
+        else if (Clazz.PUBLIC.equals(property)) {
+            retVal = Clazz.PUBLIC;
+        }
+        else if (Method.ADD.equals(property)) {
+            retVal = Method.ADD;
+        }
+        else if (Method.CANCEL.equals(property)) {
+            retVal = Method.CANCEL;
+        }
+        else if (Method.COUNTER.equals(property)) {
+            retVal = Method.COUNTER;
+        }
+        else if (Method.DECLINE_COUNTER.equals(property)) {
+            retVal = Method.DECLINE_COUNTER;
+        }
+        else if (Method.PUBLISH.equals(property)) {
+            retVal = Method.PUBLISH;
+        }
+        else if (Method.REFRESH.equals(property)) {
+            retVal = Method.REFRESH;
+        }
+        else if (Method.REPLY.equals(property)) {
+            retVal = Method.REPLY;
+        }
+        else if (Method.REQUEST.equals(property)) {
+            retVal = Method.REQUEST;
+        }
+        else if (Priority.HIGH.equals(property)) {
+            retVal = Priority.HIGH;
+        }
+        else if (Priority.LOW.equals(property)) {
+            retVal = Priority.LOW;
+        }
+        else if (Priority.MEDIUM.equals(property)) {
+            retVal = Priority.MEDIUM;
+        }
+        else if (Priority.UNDEFINED.equals(property)) {
+            retVal = Priority.UNDEFINED;
+        }
+        else if (Status.VEVENT_CANCELLED.equals(property)) {
+            retVal = Status.VEVENT_CANCELLED;
+        }
+        else if (Status.VEVENT_CONFIRMED.equals(property)) {
+            retVal = Status.VEVENT_CONFIRMED;
+        }
+        else if (Status.VEVENT_TENTATIVE.equals(property)) {
+            retVal = Status.VEVENT_TENTATIVE;
+        }
+        else if (Status.VJOURNAL_CANCELLED.equals(property)) {
+            retVal = Status.VJOURNAL_CANCELLED;
+        }
+        else if (Status.VJOURNAL_DRAFT.equals(property)) {
+            retVal = Status.VJOURNAL_DRAFT;
+        }
+        else if (Status.VJOURNAL_FINAL.equals(property)) {
+            retVal = Status.VJOURNAL_FINAL;
+        }
+        else if (Status.VTODO_CANCELLED.equals(property)) {
+            retVal = Status.VTODO_CANCELLED;
+        }
+        else if (Status.VTODO_COMPLETED.equals(property)) {
+            retVal = Status.VTODO_COMPLETED;
+        }
+        else if (Status.VTODO_IN_PROCESS.equals(property)) {
+            retVal = Status.VTODO_IN_PROCESS;
+        }
+        else if (Status.VTODO_NEEDS_ACTION.equals(property)) {
+            retVal = Status.VTODO_NEEDS_ACTION;
+        }
+        else if (Transp.OPAQUE.equals(property)) {
+            retVal = Transp.OPAQUE;
+        }
+        else if (Transp.TRANSPARENT.equals(property)) {
+            retVal = Transp.TRANSPARENT;
+        }
+        else if (Version.VERSION_2_0.equals(property)) {
+            retVal = Version.VERSION_2_0;
+        }
+        return retVal;
+    }
+}