/* * $Id: PdfPages.java,v 1.24 2002/07/15 08:50:54 blowagie Exp $ * $Name:  $ * * Copyright 1999, 2000, 2001, 2002 Bruno Lowagie * * The contents of this file are subject to the Mozilla Public License Version 1.1 * (the "License"); you may not use this file except in compliance with the License. * You may obtain a copy of the License at http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the License. * * The Original Code is 'iText, a free JAVA-PDF library'. * * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. * All Rights Reserved. * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. * * Contributor(s): all the names of the contributors are added in the source code * where applicable. * * Alternatively, the contents of this file may be used under the terms of the * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the * provisions of LGPL are applicable instead of those above.  If you wish to * allow use of your version of this file only under the terms of the LGPL * License and not to allow others to use your version of this file under * the MPL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the LGPL. * If you do not delete the provisions above, a recipient may use your version * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. * * This library is free software; you can redistribute it and/or modify it * under the terms of the MPL as stated above or under the terms of the GNU * Library General Public License as published by the Free Software Foundation; * either version 2 of the License, or 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. * * If you didn't download this code from the following link, you should check if * you aren't using an obsolete version: * http://www.lowagie.com/iText/ */package com.lowagie.text.pdf;import java.util.ArrayList;import java.util.Iterator;import com.lowagie.text.DocumentException;/** * <CODE>PdfPages</CODE> is the PDF Pages-object. * <P> * The Pages of a document are accessible through a tree of nodes known as the Pages tree. * This tree defines the ordering of the pages in the document.<BR> * This object is described in the 'Portable Document Format Reference Manual version 1.3' * section 6.3 (page 71-73) * * @see		PdfPageElement * @see		PdfPage */public class PdfPages extends PdfDictionary implements PdfPageElement {        // membervariables    /** value of the <B>Count</B>-key */    private PdfNumber count;    /** value of the <B>Kids</B>-key */    private PdfArray kids;    /** array of objects of the type <CODE>PdfPageElement</CODE> (contains the actual Pages tree) */    private ArrayList pages = new ArrayList();        // constructors    /** * Constructs a <CODE>PdfPages</CODE>-object. */        PdfPages() {        super(PAGES);        count = new PdfNumber(0);        kids = new PdfArray();        put(PdfName.COUNT, count);        put(PdfName.KIDS, kids);    }        // implementation of the PdfPageElement interface    /** * Set the value for the <B>Parent</B> key in the Page or Pages Dictionary. * * @param		reference			an indirect reference to a <CODE>PdfPages</CODE>-object */        public void setParent(PdfIndirectReference reference) {        put(PdfName.PARENT, reference);    }    /** * Checks if this page element is a tree of pages. * <P> * This method allways returns <CODE>true</CODE>. * * @return	<CODE>true</CODE> because this object is a tree of pages */        public boolean isParent() {        return true;    }        // methods    /** * Adds a <CODE>PdfPages</CODE>-object. * * @param		pages		a <CODE>PdfPages</CODE>-object */        void add(PdfPages pages) {        pages.add(pages);    }    /** * Adds a <CODE>PdfPage</CODE>-object. * * @param		page		a <CODE>PdfPage</CODE>-object */        void add(PdfPage page) {        pages.add(page);    }    /** * Updates the array of kids. * * @param		kid			an indirect reference to a <CODE>PdfPageElement</CODE>-object */        void add(PdfIndirectReference kid) {        count.increment();        kids.add(kid);    }    /** * Returns an <CODE>Iterator</CODE> with all the leafs of this Pages-object. * * @return		an <CODE>Iterator</CODE> */        Iterator iterator() {        return pages.iterator();    }        int reorderPages(int order[]) throws DocumentException {        if (order == null)            return kids.size();        if (order.length != kids.size())            throw new DocumentException("Page reordering requires and array with the same size as the number of pages.");        int max = kids.size();        boolean temp[] = new boolean[max];        for (int k = 0; k < max; ++k) {            int p = order[k];            if (p < 1 || p > max)                throw new DocumentException("Page reordering requires pages between 1 and " + max + ". Found " + p + ".");            if (temp[p - 1])                throw new DocumentException("Page reordering requires no page repetition. Page " + p + " is repeated.");            temp[p - 1] = true;        }        ArrayList array = kids.getArrayList();        Object copy[] = array.toArray();        for (int k = 0; k < max; ++k) {            array.set(k, copy[order[k] - 1]);        }        return max;    }}