001/*
002 * $Id: WritableDirectElement.java 4880 2011-05-23 23:28:09Z redlab_b $
003 *
004 * This file is part of the iText (R) project.
005 * Copyright (c) 1998-2011 1T3XT BVBA
006 * Authors: Bruno Lowagie, Paulo Soares, et al.
007 *
008 * This program is free software; you can redistribute it and/or modify
009 * it under the terms of the GNU Affero General Public License version 3
010 * as published by the Free Software Foundation with the addition of the
011 * following permission added to Section 15 as permitted in Section 7(a):
012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
014 *
015 * This program is distributed in the hope that it will be useful, but
016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
017 * or FITNESS FOR A PARTICULAR PURPOSE.
018 * See the GNU Affero General Public License for more details.
019 * You should have received a copy of the GNU Affero General Public License
020 * along with this program; if not, see http://www.gnu.org/licenses or write to
021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
022 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
023 * http://itextpdf.com/terms-of-use/
024 *
025 * The interactive user interfaces in modified source and object code versions
026 * of this program must display Appropriate Legal Notices, as required under
027 * Section 5 of the GNU Affero General Public License.
028 *
029 * In accordance with Section 7(b) of the GNU Affero General Public License,
030 * a covered work must retain the producer line in every PDF that is created
031 * or manipulated using iText.
032 *
033 * You can be released from the requirements of the license by purchasing
034 * a commercial license. Buying such a license is mandatory as soon as you
035 * develop commercial activities involving the iText software without
036 * disclosing the source code of your own applications.
037 * These activities include: offering paid services to customers as an ASP,
038 * serving PDFs on the fly in a web application, shipping iText with a closed
039 * source product.
040 *
041 * For more information, please contact iText Software Corp. at this
042 * address: sales@itextpdf.com
043 */
044package com.itextpdf.text;
045
046import java.util.ArrayList;
047import java.util.List;
048
049import com.itextpdf.text.api.WriterOperation;
050import com.itextpdf.text.pdf.PdfWriter;
051import com.itextpdf.text.pdf.draw.VerticalPositionMark;
052
053/**
054 * An element that is not an element, it holds {@link Element#WRITABLE_DIRECT}
055 * as Element type. It implements WriterOperation to do operations on the
056 * {@link PdfWriter} and the {@link Document} that must be done at the time of
057 * the writing. Much like a {@link VerticalPositionMark} but little different.
058 *
059 * @author itextpdf.com
060 *
061 */
062public abstract class WritableDirectElement implements Element, WriterOperation {
063
064        /*
065         * (non-Javadoc)
066         *
067         * @see com.itextpdf.text.Element#process(com.itextpdf.text.ElementListener)
068         */
069        public boolean process(final ElementListener listener) {
070                throw new UnsupportedOperationException();
071        }
072
073        /**
074         * @return {@link Element#WRITABLE_DIRECT}
075         */
076        public int type() {
077                return Element.WRITABLE_DIRECT;
078        }
079
080        /*
081         * (non-Javadoc)
082         *
083         * @see com.itextpdf.text.Element#isContent()
084         */
085        public boolean isContent() {
086                return false;
087        }
088
089        /*
090         * (non-Javadoc)
091         *
092         * @see com.itextpdf.text.Element#isNestable()
093         */
094        public boolean isNestable() {
095                throw new UnsupportedOperationException();
096        }
097
098        /*
099         * (non-Javadoc)
100         *
101         * @see com.itextpdf.text.Element#getChunks()
102         */
103        public List<Chunk> getChunks() {
104                return new ArrayList<Chunk>(0);
105        }
106
107}