jaxws/src/share/classes/com/sun/tools/internal/xjc/reader/gbind/OneOrMore.java

/*
 * Copyright 2006 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

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

/**
 * {@link Expression} that represents kleene-star operation (A+)
 *
 * @author Kohsuke Kawaguchi
 */
public final class OneOrMore extends Expression {
    /**
     * 'A' of 'A+'.
     */
    private final Expression child;

    public OneOrMore(Expression child) {
        this.child = child;
    }

    ElementSet lastSet() {
        return child.lastSet();
    }

    boolean isNullable() {
        return child.isNullable();
    }

    void buildDAG(ElementSet incoming) {
        child.buildDAG(ElementSets.union(incoming,child.lastSet()));
    }

    public String toString() {
        return child.toString()+'+';
    }
}