/*

 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package jdk.nashorn.internal.parser;

import java.util.ArrayList;

import java.util.List;

import jdk.nashorn.internal.ir.Statement;

/**

 * Base class for parser context nodes

 */

abstract class ParserContextBaseNode implements ParserContextNode {

    /**

     * Flags for this node

     */

    protected int flags;

    private List<Statement> statements;

    /**

     * Constructor

     */

    public ParserContextBaseNode() {

        this.statements = new ArrayList<>();

    }

    /**

     * @return The flags for this node

     */

    @Override

    public int getFlags() {

        return flags;

    }

    /**

     * Returns a single flag

     * @param flag flag

     * @return A single flag

     */

    protected int getFlag(final int flag) {

        return (flags & flag);

    }

    /**

     * @param flag flag

     * @return the new flags

     */

    @Override

    public int setFlag(final int flag) {

        flags |= flag;

        return flags;

    }

    /**

     * @return The list of statements that belongs to this node

     */

    @Override

    public List<Statement> getStatements() {

        return statements;

    }

    /**

     * @param statements statements

     */

    @Override

    public void setStatements(final List<Statement> statements) {

        this.statements = statements;

    }

    /**

     * Adds a statement at the end of the statement list

     * @param statement The statement to add

     */

    @Override

    public void appendStatement(final Statement statement) {

        this.statements.add(statement);

    }

    /**

     * Adds a statement at the beginning of the statement list

     * @param statement The statement to add

     */

    @Override

    public void prependStatement(final Statement statement) {

        this.statements.add(0, statement);

    }

}