package org.kuali.rice.krms.framework.engine;
   
   import java.util.ArrayList;
   import java.util.Collections;
   import java.util.List;
   
   import org.kuali.rice.krms.api.engine.ExecutionEnvironment;
   import org.kuali.rice.krms.api.engine.TermResolver;
   
  public final class BasicContext implements Context {
  	
  	private final List<Agenda> agendas;
  	private final List<TermResolver<?>> termResolvers;
  	
  	public BasicContext(List<Agenda> agendas, List<TermResolver<?>> termResolvers) {
  		this.agendas = agendas;
  		this.termResolvers = termResolvers;
  	}
  	
  	@Override
  	public void execute(ExecutionEnvironment environment) {
  		if (termResolvers != null) for (TermResolver<?> termResolver : termResolvers) {
  			environment.addTermResolver(termResolver);
  		}
  		List<Agenda> matchingAgendas = findMatchingAgendas(environment);
  		for (Agenda matchingAgenda : matchingAgendas) {
  			matchingAgenda.execute(environment);
  		}
  	}
  	
  	private List<Agenda> findMatchingAgendas(ExecutionEnvironment environment) {
  		List<Agenda> matchingAgendas = new ArrayList<Agenda>();
  		for (Agenda agenda : agendas) {
  			if (agenda.appliesTo(environment)) {
  				matchingAgendas.add(agenda);
  			}
  		}
  		return matchingAgendas;
  	}
  	
  	public List<TermResolver<?>> getTermResolvers() {
  		return Collections.unmodifiableList(termResolvers);
  	}
  
  }