001/*
002 * $Id: PdfLayerMembership.java 4242 2010-01-02 23:22:20Z xlv $
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.pdf;
045
046import com.itextpdf.text.error_messages.MessageLocalization;
047
048/**
049 * An array specifying a visibility expression, used to compute visibility
050 * of content based on a set of optional content groups.
051 * @since 5.0.2
052 */
053public class PdfVisibilityExpression extends PdfArray {
054
055        /** A boolean operator. */
056        public static final int OR = 0;
057        /** A boolean operator. */
058        public static final int AND = 1;
059        /** A boolean operator. */
060        public static final int NOT = -1;
061        
062        /**
063         * Creates a visibility expression.
064         * @param type should be AND, OR, or NOT
065         */
066        public PdfVisibilityExpression(int type) {
067                super();
068                switch(type) {
069                case OR:
070                        super.add(PdfName.OR);
071                        break;
072                case AND:
073                        super.add(PdfName.AND);
074                        break;
075                case NOT:
076                        super.add(PdfName.NOT);
077                        break;
078                default:
079                        throw new IllegalArgumentException(MessageLocalization.getComposedMessage("illegal.ve.value")); 
080                } 
081        }
082
083        /**
084         * @see com.itextpdf.text.pdf.PdfArray#add(int, com.itextpdf.text.pdf.PdfObject)
085         */
086        @Override
087        public void add(int index, PdfObject element) {
088                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("illegal.ve.value"));
089        }
090
091        /**
092         * @see com.itextpdf.text.pdf.PdfArray#add(com.itextpdf.text.pdf.PdfObject)
093         */
094        @Override
095        public boolean add(PdfObject object) {
096                if (object instanceof PdfLayer)
097                        return super.add(((PdfLayer)object).getRef());
098                if (object instanceof PdfVisibilityExpression)
099                        return super.add(object);
100                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("illegal.ve.value"));
101        }
102
103        /**
104         * @see com.itextpdf.text.pdf.PdfArray#addFirst(com.itextpdf.text.pdf.PdfObject)
105         */
106        @Override
107        public void addFirst(PdfObject object) {
108                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("illegal.ve.value"));
109        }
110
111        /**
112         * @see com.itextpdf.text.pdf.PdfArray#add(float[])
113         */
114        @Override
115        public boolean add(float[] values) {
116                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("illegal.ve.value"));
117        }
118
119        /**
120         * @see com.itextpdf.text.pdf.PdfArray#add(int[])
121         */
122        @Override
123        public boolean add(int[] values) {
124                throw new IllegalArgumentException(MessageLocalization.getComposedMessage("illegal.ve.value"));
125        }
126        
127}