diff -r 000000000000 -r fb9019fb1bf7 src/net/fortuna/ical4j/transform/PublishTransformer.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/net/fortuna/ical4j/transform/PublishTransformer.java	Tue Feb 10 18:12:00 2015 +0100
@@ -0,0 +1,88 @@
+/**
+ * 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.transform;
+
+import java.util.Iterator;
+import net.fortuna.ical4j.model.Calendar;
+import net.fortuna.ical4j.model.Component;
+import net.fortuna.ical4j.model.Property;
+import net.fortuna.ical4j.model.PropertyList;
+import net.fortuna.ical4j.model.property.Method;
+import net.fortuna.ical4j.model.property.Sequence;
+
+/**
+ * $Id$
+ *
+ * Created: 26/09/2004
+ *
+ * Transforms a calendar for publishing.
+ * @author benfortuna
+ */
+public class PublishTransformer extends Transformer {
+
+    /**
+     * {@inheritDoc}
+     */
+    public final Calendar transform(final Calendar calendar) {
+        PropertyList calProps = calendar.getProperties();
+
+        Property method = calProps.getProperty(Property.METHOD);
+
+        if (method != null) {
+            calProps.remove(method);
+        }
+
+        calProps.add(Method.PUBLISH);
+
+        // if a calendar component has already been published previously
+        // update the sequence number..
+        for (Iterator i = calendar.getComponents().iterator(); i.hasNext();) {
+            Component component = (Component) i.next();
+
+            PropertyList compProps = component.getProperties();
+
+            Sequence sequence = (Sequence) compProps
+                    .getProperty(Property.SEQUENCE);
+
+            if (sequence == null) {
+                compProps.add(new Sequence(0));
+            }
+            else {
+                compProps.remove(sequence);
+                compProps.add(new Sequence(sequence.getSequenceNo() + 1));
+            }
+        }
+
+        return calendar;
+    }
+
+}