package net.sourceforge.fenixedu.domain.accessControl;

import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

import net.sourceforge.fenixedu.applicationTier.IUserView;
import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.injectionCode.IGroup;

public final class GroupUnion extends NodeGroup {

    private static final long serialVersionUID = 1L;

    public GroupUnion(IGroup... groups) {
	super(groups);
    }

    public GroupUnion(Collection<IGroup> groups) {
	super(groups);
    }

    @Override
    public int getElementsCount() {
	int count = 0;

	for (IGroup child : getChildren()) {
	    count += child.getElementsCount();
	}

	return count;
    }

    @Override
    public Set<Person> getElements() {
	Set<Person> elements = new HashSet<Person>();

	for (IGroup child : getChildren()) {
	    elements.addAll(child.getElements());
	}

	return elements;

    }

    @Override
    public boolean allows(IUserView userView) {
	for (IGroup group : getChildren()) {
	    if (group.allows(userView)) {
		return true;
	    }
	}
	return false;
    }

    @Override
    public boolean isMember(Person person) {
	for (IGroup group : getChildren()) {
	    if (group.isMember(person)) {
		return true;
	    }
	}

	return false;
    }

    @Override
    protected String getExpressionOperator() {
	return "||";
    }

}