ExpressionVariableLister.java

/**
 * Copyright (c) 2017, RTE (http://www.rte-france.com)
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 * SPDX-License-Identifier: MPL-2.0
 */
package com.powsybl.action.ial.dsl.ast;

import com.powsybl.dsl.ast.ExpressionNode;

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

/**
 * @author Geoffroy Jamgotchian {@literal <geoffroy.jamgotchian at rte-france.com>}
 */
public class ExpressionVariableLister extends DefaultActionExpressionVisitor<Void, List<NetworkNode>> {

    public static List<NetworkNode> list(ExpressionNode root) {
        List<NetworkNode> variables = new ArrayList<>();
        root.accept(new ExpressionVariableLister(), variables);
        return variables;
    }

    @Override
    public Void visitNetworkProperty(NetworkPropertyNode node, List<NetworkNode> variables) {
        variables.add(node);
        return null;
    }

    @Override
    public Void visitNetworkMethod(NetworkMethodNode node, List<NetworkNode> variables) {
        variables.add(node);
        return null;
    }
}