jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/gbind/Expression.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.Set;

    30 /**

    31  * This builds content models.

    32  *

    33  * @author Kohsuke Kawaguchi

    34  */

    35 public abstract class Expression {

    37     /**

    38      * Computes <tt>LAST(exp)</tt>

    39      */

    40     abstract ElementSet lastSet();

    42     /**

    43      * True of <tt>\epsilon \in L(exp)</tt>

    44      */

    45     abstract boolean isNullable();

    47     /**

    48      * Builds up a DAG among {@link Element}s in this expression.

    49      */

    50     abstract void buildDAG(ElementSet incoming);

    52     /**

    53      * {@link Expression} that represents epsilon, the length-0 string.

    54      */

    55     public static final Expression EPSILON = new Expression() {

    56         ElementSet lastSet() {

    57             return ElementSet.EMPTY_SET;

    58         }

    60         boolean isNullable() {

    61             return true;

    62         }

    64         void buildDAG(ElementSet incoming) {

    65             // noop

    66         }

    68         public String toString() {

    69             return "-";

    70         }

    71     };

    72 }

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