001: /*
002: * $Id: PdfReaderInstance.java 2761 2007-05-16 14:16:01Z psoares33 $
003: * $Name$
004: *
005: * Copyright 2001, 2002 Paulo Soares
006: *
007: * The contents of this file are subject to the Mozilla Public License Version 1.1
008: * (the "License"); you may not use this file except in compliance with the License.
009: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
010: *
011: * Software distributed under the License is distributed on an "AS IS" basis,
012: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
013: * for the specific language governing rights and limitations under the License.
014: *
015: * The Original Code is 'iText, a free JAVA-PDF library'.
016: *
017: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
018: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
019: * All Rights Reserved.
020: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
021: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
022: *
023: * Contributor(s): all the names of the contributors are added in the source code
024: * where applicable.
025: *
026: * Alternatively, the contents of this file may be used under the terms of the
027: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
028: * provisions of LGPL are applicable instead of those above. If you wish to
029: * allow use of your version of this file only under the terms of the LGPL
030: * License and not to allow others to use your version of this file under
031: * the MPL, indicate your decision by deleting the provisions above and
032: * replace them with the notice and other provisions required by the LGPL.
033: * If you do not delete the provisions above, a recipient may use your version
034: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
035: *
036: * This library is free software; you can redistribute it and/or modify it
037: * under the terms of the MPL as stated above or under the terms of the GNU
038: * Library General Public License as published by the Free Software Foundation;
039: * either version 2 of the License, or any later version.
040: *
041: * This library is distributed in the hope that it will be useful, but WITHOUT
042: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
043: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
044: * details.
045: *
046: * If you didn't download this code from the following link, you should check if
047: * you aren't using an obsolete version:
048: * http://www.lowagie.com/iText/
049: */
050:
051: package com.lowagie.text.pdf;
052:
053: import java.io.IOException;
054: import java.util.ArrayList;
055: import java.util.HashMap;
056: import java.util.Iterator;
057:
058: /**
059: * Instance of PdfReader in each output document.
060: *
061: * @author Paulo Soares (psoares@consiste.pt)
062: */
063: class PdfReaderInstance {
064: static final PdfLiteral IDENTITYMATRIX = new PdfLiteral(
065: "[1 0 0 1 0 0]");
066: static final PdfNumber ONE = new PdfNumber(1);
067: int myXref[];
068: PdfReader reader;
069: RandomAccessFileOrArray file;
070: HashMap importedPages = new HashMap();
071: PdfWriter writer;
072: HashMap visited = new HashMap();
073: ArrayList nextRound = new ArrayList();
074:
075: PdfReaderInstance(PdfReader reader, PdfWriter writer) {
076: this .reader = reader;
077: this .writer = writer;
078: file = reader.getSafeFile();
079: myXref = new int[reader.getXrefSize()];
080: }
081:
082: PdfReader getReader() {
083: return reader;
084: }
085:
086: PdfImportedPage getImportedPage(int pageNumber) {
087: if (!reader.isOpenedWithFullPermissions())
088: throw new IllegalArgumentException(
089: "PdfReader not opened with owner password");
090: if (pageNumber < 1 || pageNumber > reader.getNumberOfPages())
091: throw new IllegalArgumentException("Invalid page number");
092: Integer i = new Integer(pageNumber);
093: PdfImportedPage pageT = (PdfImportedPage) importedPages.get(i);
094: if (pageT == null) {
095: pageT = new PdfImportedPage(this , writer, pageNumber);
096: importedPages.put(i, pageT);
097: }
098: return pageT;
099: }
100:
101: int getNewObjectNumber(int number, int generation) {
102: if (myXref[number] == 0) {
103: myXref[number] = writer.getIndirectReferenceNumber();
104: nextRound.add(new Integer(number));
105: }
106: return myXref[number];
107: }
108:
109: RandomAccessFileOrArray getReaderFile() {
110: return file;
111: }
112:
113: PdfObject getResources(int pageNumber) {
114: PdfObject obj = PdfReader.getPdfObjectRelease(reader
115: .getPageNRelease(pageNumber).get(PdfName.RESOURCES));
116: return obj;
117: }
118:
119: PdfStream getFormXObject(int pageNumber) throws IOException {
120: PdfDictionary page = reader.getPageNRelease(pageNumber);
121: PdfObject contents = PdfReader.getPdfObjectRelease(page
122: .get(PdfName.CONTENTS));
123: PdfDictionary dic = new PdfDictionary();
124: byte bout[] = null;
125: if (contents != null) {
126: if (contents.isStream())
127: dic.putAll((PRStream) contents);
128: else
129: bout = reader.getPageContent(pageNumber, file);
130: } else
131: bout = new byte[0];
132: dic.put(PdfName.RESOURCES, PdfReader.getPdfObjectRelease(page
133: .get(PdfName.RESOURCES)));
134: dic.put(PdfName.TYPE, PdfName.XOBJECT);
135: dic.put(PdfName.SUBTYPE, PdfName.FORM);
136: PdfImportedPage impPage = (PdfImportedPage) importedPages
137: .get(new Integer(pageNumber));
138: dic.put(PdfName.BBOX,
139: new PdfRectangle(impPage.getBoundingBox()));
140: PdfArray matrix = impPage.getMatrix();
141: if (matrix == null)
142: dic.put(PdfName.MATRIX, IDENTITYMATRIX);
143: else
144: dic.put(PdfName.MATRIX, matrix);
145: dic.put(PdfName.FORMTYPE, ONE);
146: PRStream stream;
147: if (bout == null) {
148: stream = new PRStream((PRStream) contents, dic);
149: } else {
150: stream = new PRStream(reader, bout);
151: stream.putAll(dic);
152: }
153: return stream;
154: }
155:
156: void writeAllVisited() throws IOException {
157: while (!nextRound.isEmpty()) {
158: ArrayList vec = nextRound;
159: nextRound = new ArrayList();
160: for (int k = 0; k < vec.size(); ++k) {
161: Integer i = (Integer) vec.get(k);
162: if (!visited.containsKey(i)) {
163: visited.put(i, null);
164: int n = i.intValue();
165: writer.addToBody(reader.getPdfObjectRelease(n),
166: myXref[n]);
167: }
168: }
169: }
170: }
171:
172: void writeAllPages() throws IOException {
173: try {
174: file.reOpen();
175: for (Iterator it = importedPages.values().iterator(); it
176: .hasNext();) {
177: PdfImportedPage ip = (PdfImportedPage) it.next();
178: writer.addToBody(ip.getFormXObject(), ip
179: .getIndirectReference());
180: }
181: writeAllVisited();
182: } finally {
183: try {
184: reader.close();
185: file.close();
186: } catch (Exception e) {
187: //Empty on purpose
188: }
189: }
190: }
191: }
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