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+/*
+ * $Id: PdfIndirectObject.java,v 1.60 2005/05/04 14:31:40 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.io.IOException;
+import java.io.OutputStream;
+
+import com.lowagie.text.DocWriter;
+
+/**
+ * <CODE>PdfIndirectObject</CODE> is the Pdf indirect object.
+ * <P>
+ * An <I>indirect object</I> is an object that has been labeled so that it can be referenced by
+ * other objects. Any type of <CODE>PdfObject</CODE> may be labeled as an indirect object.<BR>
+ * An indirect object consists of an object identifier, a direct object, and the <B>endobj</B>
+ * keyword. The <I>object identifier</I> consists of an integer <I>object number</I>, an integer
+ * <I>generation number</I>, and the <B>obj</B> keyword.<BR>
+ * This object is described in the 'Portable Document Format Reference Manual version 1.3'
+ * section 4.10 (page 53).
+ *
+ * @see PdfObject
+ * @see PdfIndirectReference
+ */
+
+public class PdfIndirectObject {
+
+ // membervariables
+
+/** The object number */
+ protected int number;
+
+/** the generation number */
+ protected int generation = 0;
+
+ static final byte STARTOBJ[] = DocWriter.getISOBytes(" obj");
+ static final byte ENDOBJ[] = DocWriter.getISOBytes("\nendobj\n");
+ static final int SIZEOBJ = STARTOBJ.length + ENDOBJ.length;
+ PdfObject object;
+ PdfWriter writer;
+
+ // constructors
+
+/**
+ * Constructs a <CODE>PdfIndirectObject</CODE>.
+ *
+ * @param number the object number
+ * @param object the direct object
+ */
+
+ PdfIndirectObject(int number, PdfObject object, PdfWriter writer) {
+ this(number, 0, object, writer);
+ }
+
+ PdfIndirectObject(PdfIndirectReference ref, PdfObject object, PdfWriter writer) {
+ this(ref.getNumber(),ref.getGeneration(),object,writer);
+ }
+/**
+ * Constructs a <CODE>PdfIndirectObject</CODE>.
+ *
+ * @param number the object number
+ * @param generation the generation number
+ * @param object the direct object
+ */
+
+ PdfIndirectObject(int number, int generation, PdfObject object, PdfWriter writer) {
+ this.writer = writer;
+ this.number = number;
+ this.generation = generation;
+ this.object = object;
+ PdfEncryption crypto = null;
+ if (writer != null)
+ crypto = writer.getEncryption();
+ if (crypto != null) {
+ crypto.setHashKey(number, generation);
+ }
+ }
+
+ // methods
+
+/**
+ * Return the length of this <CODE>PdfIndirectObject</CODE>.
+ *
+ * @return the length of the PDF-representation of this indirect object.
+ */
+
+// public int length() {
+// if (isStream)
+// return bytes.size() + SIZEOBJ + stream.getStreamLength(writer);
+// else
+// return bytes.size();
+// }
+
+
+/**
+ * Returns a <CODE>PdfIndirectReference</CODE> to this <CODE>PdfIndirectObject</CODE>.
+ *
+ * @return a <CODE>PdfIndirectReference</CODE>
+ */
+
+ public PdfIndirectReference getIndirectReference() {
+ return new PdfIndirectReference(object.type(), number, generation);
+ }
+
+/**
+ * Writes eficiently to a stream
+ *
+ * @param os the stream to write to
+ * @throws IOException on write error
+ */
+ void writeTo(OutputStream os) throws IOException
+ {
+ os.write(DocWriter.getISOBytes(String.valueOf(number)));
+ os.write(' ');
+ os.write(DocWriter.getISOBytes(String.valueOf(generation)));
+ os.write(STARTOBJ);
+ int type = object.type();
+ if (type != PdfObject.ARRAY && type != PdfObject.DICTIONARY && type != PdfObject.NAME && type != PdfObject.STRING)
+ os.write(' ');
+ object.toPdf(writer, os);
+ os.write(ENDOBJ);
+ }
+}