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}