/*

 * 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.

 *

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

import java.util.List;

import com.sun.xml.internal.dtdparser.DTDEventListener;

/**

 * @author Kohsuke Kawaguchi

 */

final class Occurence extends Term {

    final Term term;

    final boolean isOptional;

    final boolean isRepeated;

    Occurence(Term term, boolean optional, boolean repeated) {

        this.term = term;

        isOptional = optional;

        isRepeated = repeated;

    }

    static Term wrap( Term t, int occurence ) {

        switch(occurence) {

        case DTDEventListener.OCCURENCE_ONCE:

            return t;

        case DTDEventListener.OCCURENCE_ONE_OR_MORE:

            return new Occurence(t,false,true);

        case DTDEventListener.OCCURENCE_ZERO_OR_MORE:

            return new Occurence(t,true,true);

        case DTDEventListener.OCCURENCE_ZERO_OR_ONE:

            return new Occurence(t,true,false);

        default:

            throw new IllegalArgumentException();

        }

    }

    void normalize(List<Block> r, boolean optional) {

        if(isRepeated) {

            Block b = new Block(isOptional||optional,true);

            addAllElements(b);

            r.add(b);

        } else {

            term.normalize(r,optional||isOptional);

        }

    }

    void addAllElements(Block b) {

        term.addAllElements(b);

    }

    boolean isOptional() {

        return isOptional||term.isOptional();

    }

    boolean isRepeated() {

        return isRepeated||term.isRepeated();

    }

}