AuthorizationSecCondition.java

package de.persosim.simulator.seccondition;

import java.util.ArrayList;
import java.util.Collection;

import de.persosim.simulator.protocols.Oid;
import de.persosim.simulator.protocols.ta.Authorization;
import de.persosim.simulator.secstatus.EffectiveAuthorizationMechanism;
import de.persosim.simulator.secstatus.SecMechanism;

/**
 * This class represents a {@link SecCondition} requiring a certain
 * authorization status. Authorization information is identified by an OID
 * mapped to a bit field of single authorizations. This condition requires a
 * single bit within the bit field identified by a certain OID to be set.
 * 
 * @author slutters
 *
 */
public class AuthorizationSecCondition implements SecCondition {
	
	protected Oid oid;
	protected int bit;
	
	public AuthorizationSecCondition(Oid oid, int bit) {
		this.oid = oid;
		this.bit = bit;
	}
	
	@Override
	public boolean check(Collection<SecMechanism> mechanisms) {

		for(SecMechanism secMechanism:mechanisms) {
			if(secMechanism instanceof EffectiveAuthorizationMechanism) {
				EffectiveAuthorizationMechanism authMechanism = (EffectiveAuthorizationMechanism) secMechanism;
				Authorization auth = authMechanism.getAuthorization(oid);
				
				if (auth == null) return false;
				
				return auth.getAuthorization().getBit(bit);
			}
		}
		
		return false;
		
	}

	@Override
	public Collection<Class<? extends SecMechanism>> getNeededMechanisms() {
		Collection<Class<? extends SecMechanism>> mechanisms = new ArrayList<>();
		
		mechanisms.add(EffectiveAuthorizationMechanism.class);
		
		return mechanisms;
	}

	@Override
	public String toString() {
		return getClass().getSimpleName() + "[" + oid + ", require bit " + bit + "]";
	}

}