a real good pojo

gistfile1.java

public class SingleEvent {
    private final Tupple<KeyType, String> basicatId;
    private final Tupple<EventType, String> eventId;
    private final String xmlData;
    private final Boolean acquitted;

    private SingleEvent( final Tupple<KeyType, String> basicatId, final Tupple<EventType, String> eventId, final String xmlData, final Boolean acquitted ) {
        this.basicatId = basicatId;
        this.eventId = eventId;
        this.xmlData = xmlData;
        this.acquitted = acquitted;
    }

    public Tupple<KeyType, String> getBasicatId() {
        return basicatId;
    }

    public Tupple<EventType, String> getEventId() {
        return eventId;
    }

    public String getXmlData() {
        return xmlData;
    }

    public Boolean getAcquitted() {
        return acquitted;
    }

    @Override
    public boolean equals( Object objectToCompare ) {
        if( this == objectToCompare ) return true;
        if( !( objectToCompare instanceof SingleEvent ) ) return false;

        SingleEvent that = ( SingleEvent ) objectToCompare;

        if( !eventId.equals( that.eventId ) ) return false;

        return true;
    }

    @Override
    public int hashCode() {
        if( eventId == null ) return 0;
        return eventId.hashCode();
    }

    public static class Builder {
        private Tupple<KeyType, String> basicatId;
        private Tupple<EventType, String> eventId;
        private String xmlData;
        private Boolean acquitted;

        public SingleEvent toSingleEvent() {
            return new SingleEvent( basicatId, eventId, xmlData, acquitted );
        }

        public Builder withBasicatId( Tupple<KeyType, String> basicatId ) {
            this.basicatId = basicatId;
            return this;
        }

        public Builder withEventId( Tupple<EventType, String> eventId ) {
            this.eventId = eventId;
            return this;
        }

        public Builder withXmlData( String xmlData ) {
            this.xmlData = xmlData;
            return this;
        }

        public Builder withAcquitted( Boolean acquitted ) {
            this.acquitted = acquitted;
            return this;
        }
    }
}