DefaultSystemVisitor.java

/**
 *
 * This file is part of TRIO.
 *
 * TRIO 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 3 of the License, or
 * (at your option) any later version.
 *
 * TRIO 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 TRIO.  If not, see <http://www.gnu.org/licenses/>.
 */
package eu.diversify.trio.core;

import eu.diversify.trio.core.requirements.*;

/**
 * Ability to traverse a system, following the containment relationships.
 */
public abstract class DefaultSystemVisitor implements SystemVisitor {

    protected void defaultVisit() {
        // Nothing done, by default
    }

    @Override
    public void enter(System system) {
        defaultVisit();
    }

    @Override
    public void exit(System system) {
        defaultVisit();
    }

    @Override
    public void enter(Component component) {
        defaultVisit();
    }

    @Override
    public void exit(Component component) {
        defaultVisit();
    }

    @Override
    public void enter(Tag tag) {
        defaultVisit();
    }

    @Override
    public void exit(Tag tag) {
        defaultVisit();
    }

    @Override
    public void enter(Conjunction conjunction) {
        defaultVisit();
    }

    @Override
    public void exit(Conjunction conjunction) {
        defaultVisit();
    }

    @Override
    public void enter(Disjunction disjunction) {
        defaultVisit();
    }

    @Override
    public void exit(Disjunction disjunction) {
        defaultVisit();
    }

    @Override
    public void enter(Negation negation) {
        defaultVisit();
    }

    @Override
    public void exit(Negation negation) {
        defaultVisit();
    }

    @Override
    public void enter(Require require) {
        defaultVisit();
    }

    @Override
    public void exit(Require require) {
        defaultVisit();
    }

    @Override
    public void enter(Nothing nothing) {
        defaultVisit();
    }

    @Override
    public void exit(Nothing nothing) {
        defaultVisit();
    }

}