NullPointerException thrown by Roo Shell prevents Roo from adding ITDs to a service

[balteo]

Hello,

I've created a Spring service by adding the @RooService annotation to an interface and providing an implementation (see java code below) and I now systematically get the following NPE from the Roo Shell:

NullPointerException at org.springframework.roo.addon.layers.service.ServiceInterfaceLocatorImpl.getServiceInterfaces(ServiceInterfaceLocatorImpl.java:44)

Here are the interface and the classes:

import java.util.Map;

import org.springframework.roo.addon.layers.service.RooService;

import com.kadjoukor.domain.Member;
import com.kadjoukor.domain.Message;

@RooService(domainTypes = Message.class)
public interface MessageService {
	
	Map<Member, Message> retrieveLatestMessages(Member member);

}

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import com.kadjoukor.domain.Member;
import com.kadjoukor.domain.Message;

public class MessageServiceImpl implements MessageService {

	@Override
	public Map<Member, Message> retrieveLatestMessages(Member member) {
		Collection<Message> sentMessages = member.getSentMessages();
		Collection<Message> receivedMessages = member.getReceivedMessages();
		Map<Member, Message> latestMessages = new HashMap<Member, Message>();
		for (Message receivedMessage : receivedMessages) {
			Member sender = receivedMessage.getSender();
			latestMessages.put(sender, receivedMessage);
		}
		for (Message sentMessage : sentMessages) {
			Member recipient = sentMessage.getRecipient();
			if (sentMessage.getSendDate().after(latestMessages.get(recipient).getSendDate())) {
				latestMessages.put(recipient, sentMessage);
			}

		}
		return latestMessages;
	}

}

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Lob;
import javax.persistence.ManyToOne;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.roo.addon.equals.RooEquals;
import org.springframework.roo.addon.javabean.RooJavaBean;
import org.springframework.roo.addon.jpa.activerecord.RooJpaActiveRecord;
import org.springframework.roo.addon.tostring.RooToString;

@RooJavaBean
@RooToString
@RooEquals
@RooJpaActiveRecord
public class Message {

	@NotNull
	@ManyToOne
	private Member sender;

	@NotNull
	@ManyToOne
	private Member recipient;

	@NotNull
	@Temporal(TemporalType.TIMESTAMP)
	@DateTimeFormat(pattern = "dd/MM/yyyy HH:mm:ss")
	private Date sendDate;

	@NotNull
	@Lob
	@Size(min = 5, max = 500)
	@Column(length = 500)
	private String message;

}

I am pretty sure it is something to do with a reserved keyword as all my other service work fine and don't cause the Roo shell to throw such an exception.

Regards,

J.

P.S. I have opened an jira here: https://jira.springsource.org/browse/ROO-3308