/** * Copyright (c) 2006 by Know-Center, Graz, Austria * * This software is the confidential and proprietary information of Know-Center, * Graz, Austria. You shall not disclose such Confidential Information and shall * use it only in accordance with the terms of the license agreement you entered * into with Know-Center. * * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS * DERIVATIVES. * * $Id: PDFNames.java,v 1.1 2006/08/25 17:00:59 wprinz Exp $ */ package at.knowcenter.wag.exactparser.parsing; /** * Abstract class that contains several frequently used PDF constants. * *

* The PDF specification partitions the character set (ASCII) into three groups: *

* *

* Newlines consist per default of CR and LF, but also LF and even CR alone are * allowed. It seems that all variations of newlines may exist within a single * document. *

* * @author wprinz */ public abstract class PDFNames { /** * The standard encoding of PDF tokens and names. * *

* PDF is usually an 8 bit format. Binary data etc. can be saves just as it * is. Nevertheless all PDF tokens ('xref', 'obj', etc.) and PDF Names * ('/Size', '/Pages', '/Type', etc.) must be in 7 bit ASCII US encoding. *

*

* Therefor, whenever using Java Strings to convert e.g. numbers to such PDF * tokens use this encoding constant. *

*

* The same applies for PDF token/name byte arrays that are retransfromed to * Java Strings. *

*/ public static final String PDF_STANDARD_ENCODING = "US-ASCII"; // Whitespace characters // TABLE 3.1 White-space characters // DECIMAL HEXADECIMAL OCTAL NAME // 0 00 000 Null (NUL) // 9 09 011 Tab (HT) // 10 0A 012 Line feed (LF) // 12 0C 014 Form feed (FF) // 13 0D 015 Carriage return // 32 20 040 Space (SP) public static final byte WHITESPACE_NUL = 0x00; public static final byte WHITESPACE_HT = 0x09; public static final byte WHITESPACE_LF = 0x0A; public static final byte WHITESPACE_FF = 0x0C; public static final byte WHITESPACE_CR = 0x0D; public static final byte WHITESPACE_SP = 0x20; public static final byte[] WHITESPACE_CHARACTERS = { WHITESPACE_NUL, WHITESPACE_HT, WHITESPACE_LF, WHITESPACE_FF, WHITESPACE_CR, WHITESPACE_SP }; // comment character public static final byte COMMENT = '%'; // PDF-version public static final byte[] PDF_VERSION_STR = { 'P', 'D', 'F', '-' }; public static final byte PDF_VERSION_SEPARATOR = '.'; // delimiter characters public static final byte DELIMITER_STRING_OPEN = '('; public static final byte DELIMITER_STRING_CLOSE = ')'; public static final byte DELIMITER_HEXSTRING_OPEN = '<'; public static final byte DELIMITER_HEXSTRING_CLOSE = '>'; public static final byte DELIMITER_ARRAY_OPEN = '['; public static final byte DELIMITER_ARRAY_CLOSE = ']'; public static final byte DELIMITER_CURLY_OPEN = '{'; public static final byte DELIMITER_CURLY_CLOSE = '}'; public static final byte DELIMITER_NAME = '/'; public static final byte[] DELIMITER_CHARACTERS = { DELIMITER_STRING_OPEN, DELIMITER_STRING_CLOSE, DELIMITER_HEXSTRING_OPEN, DELIMITER_HEXSTRING_CLOSE, DELIMITER_ARRAY_OPEN, DELIMITER_ARRAY_CLOSE, DELIMITER_CURLY_OPEN, DELIMITER_CURLY_CLOSE, DELIMITER_NAME }; // Footer public static final byte[] XREF_STR = { 'x', 'r', 'e', 'f' }; public static final byte[] TRAILER_STR = { 't', 'r', 'a', 'i', 'l', 'e', 'r' }; public static final byte[] STARTXREF_STR = { 's', 't', 'a', 'r', 't', 'x', 'r', 'e', 'f' }; public static final byte[] EOF_STR = { '%', '%', 'E', 'O', 'F' }; // objects public static final byte[] OBJ_STR = { 'o', 'b', 'j' }; public static final byte[] ENDOBJ_STR = { 'e', 'n', 'd', 'o', 'b', 'j' }; public static final byte[] DICT_START_STR = { DELIMITER_HEXSTRING_OPEN, DELIMITER_HEXSTRING_OPEN }; public static final byte[] DICT_END_STR = { DELIMITER_HEXSTRING_CLOSE, DELIMITER_HEXSTRING_CLOSE }; public static final byte[] STREAM_STR = { 's', 't', 'r', 'e', 'a', 'm' }; public static final byte[] ENDSTREAM_STR = { 'e', 'n', 'd', 's', 't', 'r', 'e', 'a', 'm' }; public static final byte[] NULL_STR = { 'n', 'u', 'l', 'l' }; public static final byte[] TRUE_STR = { 't', 'r', 'u', 'e' }; public static final byte[] FALSE_STR = { 'f', 'a', 'l', 's', 'e' }; // indirect object references public static final byte[] REFERENCE_STR = { 'R' }; // Dictionary keys public static final byte[] SIZE_STR = { 'S', 'i', 'z', 'e' }; public static final byte[] PREV_STR = { 'P', 'r', 'e', 'v' }; public static final byte[] ROOT_STR = { 'R', 'o', 'o', 't' }; public static final byte[] INFO_STR = { 'I', 'n', 'f', 'o' }; public static final byte[] LENGTH_STR = { 'L', 'e', 'n', 'g', 't', 'h' }; }