Who Chose Jordi Hereu?

I am not fond of the mayor. It's not personal. He is representative rather than exceptional, an embodiment of a political class that stands unopposed at every election. He is a professional politician, a party man. I have been trying to discover who chose him--or at least how he was chosen--on the resignation of his predecessor in August 2006. The issue was and is so immaterial to city politics that is was not reported in the city press. The 30 August 2006 edition of El Punt comes closest to broaching the topic. According to El Punt, Hereu was told by the Catalan Socialist Party that he had been chosen. There was not and has not been any involvement of the party rank and file: as far as I can ascertain, he has never stood for open election in his party and only been elected to anything as part of a list.