/*

 * Copyright (c) 2003, 2004, 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

 * questions.

 */

package sun.reflect.generics.tree;

import sun.reflect.generics.visitor.TypeTreeVisitor;

public class Wildcard implements TypeArgument {

    private final FieldTypeSignature[] upperBounds;

    private final FieldTypeSignature[] lowerBounds;

    private Wildcard(FieldTypeSignature[] ubs, FieldTypeSignature[] lbs) {

        upperBounds = ubs;

        lowerBounds = lbs;

    }

    private static final FieldTypeSignature[] emptyBounds = new FieldTypeSignature[0];

    public static Wildcard make(FieldTypeSignature[] ubs,

                                FieldTypeSignature[] lbs) {

        return new Wildcard(ubs, lbs);

    }

    public FieldTypeSignature[] getUpperBounds() {

        return upperBounds;

    }

    public FieldTypeSignature[] getLowerBounds() {

        if (lowerBounds.length == 1 &&

            lowerBounds[0] == BottomSignature.make())

            return emptyBounds;

        else

            return lowerBounds;

    }

    public void accept(TypeTreeVisitor<?> v){v.visitWildcard(this);}

}