/**
 * This file is part of the Meeds project (https://meeds.io/).
 *
 * Copyright (C) 2020 - 2025 Meeds Association contact@meeds.io
 *
 * This program 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.
 * This program 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 program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.exoplatform.web.controller.regexp;

/**
 * Renders a {@link org.exoplatform.web.controller.regexp.RENode} to its pattern representation.
 *
 */
public abstract class REVisitor<E extends Exception> {

    protected void visit(RENode.Disjunction disjunction) throws E {
        RENode alternative = disjunction.getAlternative();
        if (alternative != null) {
            alternative.accept(this);
        }
        RENode.Disjunction next = disjunction.getNext();
        if (next != null) {
            next.accept(this);
        }
    }

    protected void visit(RENode.Alternative alternative) throws E {
        alternative.getExpr().accept(this);
        RENode.Alternative next = alternative.getNext();
        if (next != null) {
            next.accept(this);
        }
    }

    protected void visit(RENode.Assertion.Begin expr) throws E {
    }

    protected void visit(RENode.Assertion.End expr) throws E {
    }

    protected void visit(RENode.Group expr) throws E {
        RENode.Disjunction disjunction = expr.getDisjunction();
        if (disjunction != null) {
            disjunction.accept(this);
        }
    }

    protected void visit(RENode.Char expr) throws E {
    }

    protected void visit(RENode.Any expr) throws E {
    }

    protected void visit(RENode.CharacterClass expr) throws E {
        expr.getExpr().accept(this);
    }

    protected void visit(RENode.CharacterClassExpr.Not expr) throws E {
        RENode.CharacterClassExpr negated = expr.getNegated();
        if (negated != null) {
            negated.accept(this);
        }
    }

    protected void visit(RENode.CharacterClassExpr.Or expr) throws E {
        RENode.CharacterClassExpr left = expr.getLeft();
        if (left != null) {
            left.accept(this);
        }
        RENode.CharacterClassExpr right = expr.getRight();
        if (right != null) {
            right.accept(this);
        }
    }

    protected void visit(RENode.CharacterClassExpr.And expr) throws E {
        RENode.CharacterClassExpr left = expr.getLeft();
        if (left != null) {
            left.accept(this);
        }
        RENode.CharacterClassExpr right = expr.getRight();
        if (right != null) {
            right.accept(this);
        }
    }

    protected void visit(RENode.CharacterClassExpr.Range expr) throws E {
    }

    protected void visit(RENode.CharacterClassExpr.Char expr) throws E {
    }
}
