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/*
 * JVoiceXML - A free VoiceXML implementation.
 *
 * Copyright (C) 2005-2018 JVoiceXML group - http://jvoicexml.sourceforge.net
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

package org.jvoicexml.xml.pls;

import org.jvoicexml.xml.Text;
import org.jvoicexml.xml.XmlNode;
import org.jvoicexml.xml.XmlNodeFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;

/**
 * A <lexeme> contains at least one
 * <grapheme> element. The <grapheme>
 * element contains text describing the orthography of the
 * <lexeme>.
 *
 * @author Dirk Schnelle-Walka
 */
public final class Grapheme
        extends AbstractPlsNode {
    /** Name of the tag. */
    public static final String TAG_NAME = "grapheme";

    /**
     * Construct a new grapheme object without a node.
     * 
     * This is necessary for the node factory.
     * 
     *
     * @see PlsNodeFactory
     */
    public Grapheme() {
        super(null);
    }

    /**
     * Construct a new grapheme object.
     * @param node The encapsulated node.
     */
    Grapheme(final Node node) {
        super(node);
    }

    /**
     * Constructs a new node.
     *
     * @param n
     *            The encapsulated node.
     * @param factory
     *            The node factory to use.
     */
    private Grapheme(final Node n,
            final XmlNodeFactory factory) {
        super(n, factory);
    }

    /**
     * Get the name of the tag for the derived node.
     *
     * @return name of the tag.
     */
    public String getTagName() {
        return TAG_NAME;
    }

    /**
     * {@inheritDoc}
     */
    public XmlNode newInstance(final Node n,
            final XmlNodeFactory factory) {
        return new Grapheme(n, factory);
    }
    /**
     * {@inheritDoc}
     */
    @Override
    protected boolean canContainChild(final String tagName) {
        return false;
    }

    /**
     * Create a new text within this grapheme element.
     * @param text The text to be added.
     * @return The new created text.
     */
    public Text addText(final String text) {
        final Document document = getOwnerDocument();
        final Node node = document.createTextNode(text);
        final Text textNode = new Text(node, getNodeFactory());

        appendChild(textNode);

        return textNode;
    }
}