jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/gbind/ElementSets.java@0989ad8c0860

8010393: Update JAX-WS RI to 2.2.9-b12941
Reviewed-by: alanb, erikj
Contributed-by: miroslav.kos@oracle.com, martin.grebac@oracle.com

     1 /*

     2  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

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

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

    26 package com.sun.tools.internal.xjc.reader.gbind;

    28 import java.util.LinkedHashSet;

    30 /**

    31  * Factory methods for {@link ElementSet}.

    32  *

    33  * @author Kohsuke Kawaguchi

    34  */

    35 public final class ElementSets {

    36     /**

    37      * Returns an union of two {@link ElementSet}s.

    38      *

    39      * This method performs better if lhs is bigger than rhs

    40      */

    41     public static ElementSet union(ElementSet lhs, ElementSet rhs) {

    42         if(lhs.contains(rhs))

    43             return lhs;

    44         if(lhs==ElementSet.EMPTY_SET)

    45             return rhs;

    46         if(rhs==ElementSet.EMPTY_SET)

    47             return lhs;

    48         return new MultiValueSet(lhs,rhs);

    49     }

    51     /**

    52      * {@link ElementSet} that has multiple {@link Element}s in it.

    53      *

    54      * This isn't particularly efficient or anything, but it will do for now.

    55      */

    56     private static final class MultiValueSet extends LinkedHashSet<Element> implements ElementSet {

    57         public MultiValueSet(ElementSet lhs, ElementSet rhs) {

    58             addAll(lhs);

    59             addAll(rhs);

    60             // not that anything will break with size==1 MultiValueSet,

    61             // but it does suggest that we are missing an easy optimization

    62             assert size()>1;

    63         }

    65         private void addAll(ElementSet lhs) {

    66             if(lhs instanceof MultiValueSet) {

    67                 super.addAll((MultiValueSet)lhs);

    68             } else {

    69                 for (Element e : lhs)

    70                     add(e);

    71             }

    72         }

    74         public boolean contains(ElementSet rhs) {

    75             // this isn't complete but sound

    76             return super.contains(rhs) || rhs==ElementSet.EMPTY_SET;

    77         }

    79         public void addNext(Element element) {

    80             for (Element e : this)

    81                 e.addNext(element);

    82         }

    83     }

    84 }

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