/*

 * Copyright (c) 2010, 2013, 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

 * or visit www.oracle.com if you need additional information or have any

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 */

package jdk.nashorn.internal.ir;

import jdk.nashorn.internal.ir.annotations.Immutable;

import jdk.nashorn.internal.ir.visitor.NodeVisitor;

/**

 * IR representation of a property access (period operator.)

 */

@Immutable

public final class AccessNode extends BaseNode {

    /** Property ident. */

    private final IdentNode property;

    /**

     * Constructor

     *

     * @param token     token

     * @param finish    finish

     * @param base      base node

     * @param property  property

     */

    public AccessNode(final long token, final int finish, final Expression base, final IdentNode property) {

        super(token, finish, base, false);

        this.property = property.setIsPropertyName();

    }

        this.property = property;

    }

    /**

     * Assist in IR navigation.

     * @param visitor IR navigating visitor.

     */

    @Override

    public Node accept(final NodeVisitor<? extends LexicalContext> visitor) {

        if (visitor.enterAccessNode(this)) {

            return visitor.leaveAccessNode(

                setBase((Expression)base.accept(visitor)).

                setProperty((IdentNode)property.accept(visitor)));

        }

        return this;

    }

    @Override

    public void toString(final StringBuilder sb) {

        final boolean needsParen = tokenType().needsParens(getBase().tokenType(), true);

        if (needsParen) {

            sb.append('(');

        }

        base.toString(sb);

        if (needsParen) {

            sb.append(')');

        }

        sb.append('.');

        sb.append(property.getName());

    }

    /**

     * Get the property

     *

     * @return the property IdentNode

     */

    public IdentNode getProperty() {

        return property;

    }

    private AccessNode setBase(final Expression base) {

        if (this.base == base) {

            return this;

        }

    }

    private AccessNode setProperty(final IdentNode property) {

        if (this.property == property) {

            return this;

        }

    }

    @Override

        if (isFunction()) {

            return this;

        }

    }

}