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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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,
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 *
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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()+'+';
    }
}
