src/org/ohmage/domain/campaign/Campaign.java
public void addRequestUserRoles(final Collection<Role> roles) throws DomainException { 
		if (roles == null || roles.size() == 0) {
			throw new DomainException("The request user's roles is null or empty");
		}
		requestUserRoles.addAll(roles);
	}
/**
	 * Adds a collection of roles of the request user associated with 
	 * this campaign.
	 * 
	 * @param roles The request user's configuration role.
	 * 
	 * @throws DomainException Thrown if the roles is null.
	 */
Adds a collection of roles of the request user associated with
this campaign.

@param roles The request user's configuration role.

@throws DomainException Thrown if the roles is null.
Adds a collection of roles of the request user associated with this campaign . @param roles The request user ' s configuration role . @throws DomainException Thrown if the roles is null .
public void addRequestUserRoles(final Collection<Role> roles) throws DomainException { 
		if (roles == null || roles.size() == 0) {
			throw new DomainException("The request user's roles is null or empty");
		}
		requestUserRoles.addAll(roles);
	}
public void addRequestUserRoles ( final Collection < Role > roles ) throws DomainException { if ( roles == null || roles . size ( ) == 0 ) { throw new DomainException ( "The request user's roles is null or empty" ) ; } requestUserRoles . addAll ( roles ) ; }
Adds a collection of roles of the request user associated with
 this campaign.
Adds a collection of roles of the request user associated with this campaign .