Updated groupware templates

src/main/java/org/ical4j/template/groupware/Anniversary.java

@@ -0,0 +1,50 @@
+package org.ical4j.template.groupware;
+
+import net.fortuna.ical4j.extensions.property.Repeats;
+import net.fortuna.ical4j.model.component.VEvent;
+import org.ical4j.template.AbstractTemplate;
+
+import java.time.LocalDate;
+
+import static net.fortuna.ical4j.model.DateTimePropertyModifiers.DTSTART;
+import static net.fortuna.ical4j.model.RecurrencePropertyModifiers.RRULE;
+
+/**
+ * Creates a recurring {@link VEvent} representing a birthday/anniversary, etc.
+ */
+public class Anniversary extends AbstractTemplate<VEvent> {
+
+    private Repeats<?> schedule;
+
+    private LocalDate date;
+
+    public Anniversary() {
+        super(VEvent.class);
+    }
+
+    public Anniversary(Class<? extends VEvent> typeClass) {
+        super(typeClass);
+    }
+
+    public <T extends VEvent> Anniversary(T prototype) {
+        super(prototype.getClass());
+        setPrototype(prototype);
+    }
+
+    public Anniversary withRepeats(Repeats<?> schedule) {
+        this.schedule = schedule;
+        return this;
+    }
+
+    public Anniversary withDate(LocalDate date) {
+        this.date = date;
+        return this;
+    }
+
+    @Override
+    public VEvent apply(VEvent vEvent) {
+        vEvent.with(DTSTART, date);
+        vEvent.with(RRULE, schedule);
+        return vEvent;
+    }
+}

src/main/java/org/ical4j/template/groupware/Observance.java

@@ -0,0 +1,83 @@
+package org.ical4j.template.groupware;
+
+import net.fortuna.ical4j.extensions.property.Repeats;
+import net.fortuna.ical4j.model.DateList;
+import net.fortuna.ical4j.model.DateTimePropertyModifiers;
+import net.fortuna.ical4j.model.DescriptivePropertyModifiers;
+import net.fortuna.ical4j.model.RecurrencePropertyModifiers;
+import net.fortuna.ical4j.model.component.VEvent;
+import net.fortuna.ical4j.model.property.immutable.ImmutableTransp;
+import org.ical4j.template.AbstractTemplate;
+
+import java.time.LocalDate;
+import java.time.temporal.Temporal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Creates an (optionally recurring) date-based {@link VEvent} representing a public holiday or
+ * other observance.
+ *
+ * Includes observances from <a href="https://www.un.org/en/observances/list-days-weeks"> UN International Days</a>.
+ */
+public class Observance extends AbstractTemplate<VEvent> {
+
+    private String title;
+
+    private Temporal start;
+
+    private Temporal end;
+
+    private List<LocalDate> dates = new ArrayList<>();
+
+    private Repeats<LocalDate> schedule;
+
+    public Observance() {
+        super(VEvent.class);
+    }
+
+    public Observance(Class<? extends VEvent> typeClass) {
+        super(typeClass);
+    }
+
+    public <T extends VEvent> Observance(T prototype) {
+        super(prototype.getClass());
+        setPrototype(prototype);
+    }
+
+    public Observance title(String title) {
+        this.title = title;
+        return this;
+    }
+
+    public Observance start(Temporal date) {
+        this.start = date;
+        return this;
+    }
+
+    public Observance end(Temporal date) {
+        this.end = date;
+        return this;
+    }
+
+    public Observance date(LocalDate date) {
+        dates.add(date);
+        return this;
+    }
+
+    public Observance repeats(Repeats<LocalDate> schedule) {
+        this.schedule = schedule;
+        return this;
+    }
+
+    @Override
+    public VEvent apply(VEvent vEvent) {
+        vEvent.replace(ImmutableTransp.TRANSPARENT);
+        vEvent.with(DescriptivePropertyModifiers.SUMMARY, title);
+        vEvent.with(DateTimePropertyModifiers.DTSTART, start);
+        vEvent.with(DateTimePropertyModifiers.DTEND, end);
+        vEvent.with(RecurrencePropertyModifiers.RRULE, schedule);
+        vEvent.with(RecurrencePropertyModifiers.RDATE, new DateList<>(dates));
+        return vEvent;
+    }
+}