/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2015, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.cli.accesscontrol;

import static org.wildfly.common.Assert.checkNotNullParam;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;


/**
 * @author Alexey Loubyansky
 *
 */
public abstract class AccessRequirementSet extends BaseAccessRequirement {

    protected List<AccessRequirement> requirements = Collections.emptyList();

    public void add(AccessRequirement requirement) {
        checkNotNullParam("requirement", requirement);

        if(requirements.isEmpty()) {
            requirements = Collections.singletonList(requirement);
        } else {
            if (requirements.size() == 1) {
                final List<AccessRequirement> tmp = requirements;
                requirements = new ArrayList<AccessRequirement>();
                requirements.addAll(tmp);
            }
            requirements.add(requirement);
        }
    }

    private String toString;
    @Override
    public String toString() {
        if(toString == null) {
            toString = requirements.toString();
        }
        return toString;
    }
}
