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Java Source Code / Java Documentation » PDF » jPod » de.intarsys.pdf.parser

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

de.intarsys.pdf.parser .PDFParser

All known Subclasses:   de.intarsys.pdf.parser .COSDocumentParser,  de.intarsys.pdf.parser .CSContentParser,
PDFParser
abstract public class PDFParser (Code)
An abstract superclass for our two flavours of PDF Parsers.

Field Summary
final protected static byte CHARCLASS_ANY

final protected static byte CHARCLASS_DELIMITER

final protected static byte CHARCLASS_DIGIT

final protected static byte CHARCLASS_NUMBERSPECIAL

final protected static byte CHARCLASS_TOKEN

final protected static byte CHARCLASS_WHITESPACE

public static char CHAR_BS

public static char CHAR_CR

public static char CHAR_FF

public static char CHAR_HT

public static char CHAR_LF

final protected static String C_TOKEN_ADDWSA

final protected static String C_TOKEN_ADDWSB

final protected static String C_TOKEN_COMMENT

final protected static String C_TOKEN_NOWSA

final public static String C_WARN_ARRAYSIZE

final public static String C_WARN_ENDOBJ_MISSING

final public static String C_WARN_ENDSTREAMCORRUPT

final public static String C_WARN_ENDSTREAMEOL

final public static String C_WARN_ILLEGALHEX

final public static String C_WARN_NAMETOLONG

final public static String C_WARN_SINGLEEOL

final public static String C_WARN_SINGLEEOL_OBJ

final public static String C_WARN_SINGLESPACE

final public static String C_WARN_SINGLESPACE_OBJ

final public static String C_WARN_STREAMEOL

final public static String C_WARN_STREAMEXTERNAL

final public static String C_WARN_STREAMLENGTH

final public static String C_WARN_STRINGTOLONG

final public static String C_WARN_UNEVENHEX

final public static byte[] TOKEN_EOF

final public static byte[] TOKEN_FDFHEADER

final public static byte[] TOKEN_PDFHEADER

final public static byte[] TOKEN_R

final public static byte[] TOKEN_endobj

final public static byte[] TOKEN_endstream

final public static byte[] TOKEN_false

final public static byte[] TOKEN_ndstream

final public static byte[] TOKEN_null

final public static byte[] TOKEN_obj

final public static byte[] TOKEN_s_tream

final public static byte[] TOKEN_startxref

final public static byte[] TOKEN_stream

final public static byte[] TOKEN_trailer

final public static byte[] TOKEN_true

final public static byte[] TOKEN_xref

final protected static byte[] characterClass

protected boolean check


Method Summary
abstract protected COSIndirectObject createObjectReference()

public IPDFParserExceptionHandler getExceptionHandler()

protected COSObjectKey getObjectKey()

protected ISystemSecurityHandler getSecurityHandler()

public void handleError(COSLoadError error)
     Handle an error if an exceptionHandler is set.
public void handleWarning(COSLoadWarning warning)
     Handle a warning if an exceptionHandler is set.
final public static boolean isDelimiter(int i)
     evaluate to true if i is a PDF Delimiter char.
final public static boolean isDigit(int i)
     evaluate to true if i is a valid digit.
final public static boolean isEOL(int i)
     evaluate to true if i is a valid line terminator.
final public static boolean isNumberStart(int i)
     evaluate to true if i is a valid first char for a number token.
final public static boolean isOctalDigit(int i)
     evaluate to true if i is a valid octal digit.
final public static boolean isTokenStart(int i)
     evaluate to true if i is a valid string token start.
final public static boolean isWhitespace(int i)
     evaluate to true if i is a valid whitespace.
protected COSObject lookaheadPop()
     in order to read references we need a two object lookahead for the integer numbers this method pops the first object from the fifo structure.
protected void lookaheadPush(COSObject obj)
     in order to read references we need a two object lookahead for the integer numbers this method pushes an object in the fifo structure.
protected void parseComment(IRandomAccess input)
     comment see PDF Reference v1.4, chapter 3.1.2 comments Comment ::= "%" anyChar EOL read until end of line.
public Object parseElement(IRandomAccess input)
     parse the basic elements from the current stream position.
public STDocType parseHeader(IRandomAccess input)
     pdf header see PDF Reference v1.4, chapter 3.4.1 Header COSHEader ::= "%PDF-" version.
protected COSDocumentElement parseObject(IRandomAccess input)
     Parse a valid COS object for use in document context from the current stream position.
protected COSObject parseObjectDictionary(IRandomAccess input)

protected COSObject parseOnObjectArray(IRandomAccess input)
     parse a COS array from the current stream position.
protected COSObject parseOnObjectDictionary(IRandomAccess input)
     parse a COS dictionary from the current stream position.
protected COSObject parseOnObjectHexString(IRandomAccess input, int next)
     parse a COS string encoded in hex from the current stream position.
protected COSObject parseOnObjectName(IRandomAccess input)
     parse a COS name from the current stream position.
protected COSObject parseOnObjectNumber(IRandomAccess input, int next)
     parse a COS number from the current stream position.
protected COSObject parseOnObjectStream(IRandomAccess input, COSDictionary dict)
     parse a COS stream from the current stream position.
protected COSObject parseOnObjectStreamOrDictionary(IRandomAccess input)
     parse a COS stream or dictionary from the current stream position.
protected COSObject parseOnObjectStreamOrDictionaryOrHexString(IRandomAccess input)
     parse a COS stream or dictionary or hex string from the current stream position.
protected COSObject parseOnObjectString(IRandomAccess input)
     parse a COS string from the current stream position.
protected boolean readEOL(IRandomAccess input)
     Consume whitespace.
protected int readEscape(IRandomAccess input)
     read an esacped char from the stream.
public int readInteger(IRandomAccess input, boolean consumeSpaceAfter)
     reads the next integer on input.
protected int readOctalChar(IRandomAccess input)
     read an octal character from the stream.
public void readSpaces(IRandomAccess input)
     read all characters until EOF or non space char appears.
protected byte[] readStream(IRandomAccess input)
     Read all characters up to "endstream" and assume them belonging to the stream.
public byte[] readToken(IRandomAccess input)
     read a single token.
public byte[] readToken(IRandomAccess input, List messages)

protected byte[] readTokenElement(IRandomAccess input, int next)

protected byte[] readTokenElement(IRandomAccess input, int next, List messages)

public void setExceptionHandler(IPDFParserExceptionHandler exceptionHandler)

protected void setObjectKey(COSObjectKey objectKey)

protected void setSecurityHandler(ISystemSecurityHandler securityHandler)

public static COSObject toCOSObject(byte[] data)
     parse the given byte array to a valid COSObject.

Field Detail
CHARCLASS_ANY
final protected static byte CHARCLASS_ANY(Code)

CHARCLASS_DELIMITER
final protected static byte CHARCLASS_DELIMITER(Code)

CHARCLASS_DIGIT
final protected static byte CHARCLASS_DIGIT(Code)

CHARCLASS_NUMBERSPECIAL
final protected static byte CHARCLASS_NUMBERSPECIAL(Code)

CHARCLASS_TOKEN
final protected static byte CHARCLASS_TOKEN(Code)

CHARCLASS_WHITESPACE
final protected static byte CHARCLASS_WHITESPACE(Code)

CHAR_BS
public static char CHAR_BS(Code)

CHAR_CR
public static char CHAR_CR(Code)

CHAR_FF
public static char CHAR_FF(Code)

CHAR_HT
public static char CHAR_HT(Code)

CHAR_LF
public static char CHAR_LF(Code)

C_TOKEN_ADDWSA
final protected static String C_TOKEN_ADDWSA(Code)

C_TOKEN_ADDWSB
final protected static String C_TOKEN_ADDWSB(Code)

C_TOKEN_COMMENT
final protected static String C_TOKEN_COMMENT(Code)

C_TOKEN_NOWSA
final protected static String C_TOKEN_NOWSA(Code)

C_WARN_ARRAYSIZE
final public static String C_WARN_ARRAYSIZE(Code)

C_WARN_ENDOBJ_MISSING
final public static String C_WARN_ENDOBJ_MISSING(Code)

C_WARN_ENDSTREAMCORRUPT
final public static String C_WARN_ENDSTREAMCORRUPT(Code)

C_WARN_ENDSTREAMEOL
final public static String C_WARN_ENDSTREAMEOL(Code)

C_WARN_ILLEGALHEX
final public static String C_WARN_ILLEGALHEX(Code)

C_WARN_NAMETOLONG
final public static String C_WARN_NAMETOLONG(Code)

C_WARN_SINGLEEOL
final public static String C_WARN_SINGLEEOL(Code)

C_WARN_SINGLEEOL_OBJ
final public static String C_WARN_SINGLEEOL_OBJ(Code)

C_WARN_SINGLESPACE
final public static String C_WARN_SINGLESPACE(Code)

C_WARN_SINGLESPACE_OBJ
final public static String C_WARN_SINGLESPACE_OBJ(Code)

C_WARN_STREAMEOL
final public static String C_WARN_STREAMEOL(Code)

C_WARN_STREAMEXTERNAL
final public static String C_WARN_STREAMEXTERNAL(Code)

C_WARN_STREAMLENGTH
final public static String C_WARN_STREAMLENGTH(Code)

C_WARN_STRINGTOLONG
final public static String C_WARN_STRINGTOLONG(Code)

C_WARN_UNEVENHEX
final public static String C_WARN_UNEVENHEX(Code)

TOKEN_EOF
final public static byte[] TOKEN_EOF(Code)

TOKEN_FDFHEADER
final public static byte[] TOKEN_FDFHEADER(Code)

TOKEN_PDFHEADER
final public static byte[] TOKEN_PDFHEADER(Code)

TOKEN_R
final public static byte[] TOKEN_R(Code)

TOKEN_endobj
final public static byte[] TOKEN_endobj(Code)

TOKEN_endstream
final public static byte[] TOKEN_endstream(Code)

TOKEN_false
final public static byte[] TOKEN_false(Code)

TOKEN_ndstream
final public static byte[] TOKEN_ndstream(Code)

TOKEN_null
final public static byte[] TOKEN_null(Code)

TOKEN_obj
final public static byte[] TOKEN_obj(Code)

TOKEN_s_tream
final public static byte[] TOKEN_s_tream(Code)

TOKEN_startxref
final public static byte[] TOKEN_startxref(Code)

TOKEN_stream
final public static byte[] TOKEN_stream(Code)

TOKEN_trailer
final public static byte[] TOKEN_trailer(Code)

TOKEN_true
final public static byte[] TOKEN_true(Code)

TOKEN_xref
final public static byte[] TOKEN_xref(Code)

characterClass
final protected static byte[] characterClass(Code)

check
protected boolean check(Code)

Method Detail
createObjectReference
abstract protected COSIndirectObject createObjectReference() throws IOException, COSLoadException(Code)

getExceptionHandler
public IPDFParserExceptionHandler getExceptionHandler()(Code)

getObjectKey
protected COSObjectKey getObjectKey()(Code)

getSecurityHandler
protected ISystemSecurityHandler getSecurityHandler()(Code)

handleError
public void handleError(COSLoadError error) throws COSLoadException(Code)
Handle an error if an exceptionHandler is set.
Parameters:
  error -
throws:
  COSLoadException -

handleWarning
public void handleWarning(COSLoadWarning warning) throws COSLoadException(Code)
Handle a warning if an exceptionHandler is set.
Parameters:
  warning -
throws:
  COSLoadException -

isDelimiter
final public static boolean isDelimiter(int i)(Code)
evaluate to true if i is a PDF Delimiter char.
See pdf spec delimiter characters.

Parameters:
  i - i a byte representation true if i is a PDF delimiter char

isDigit
final public static boolean isDigit(int i)(Code)
evaluate to true if i is a valid digit.
Parameters:
  i - i a byte representation true if i is a valid digit

isEOL
final public static boolean isEOL(int i)(Code)
evaluate to true if i is a valid line terminator.
Parameters:
  i - i a byte representation true if i is a valid line terminator

isNumberStart
final public static boolean isNumberStart(int i)(Code)
evaluate to true if i is a valid first char for a number token.
Parameters:
  i - i a byte representation true if i is a valid first char for a number token

isOctalDigit
final public static boolean isOctalDigit(int i)(Code)
evaluate to true if i is a valid octal digit.
Parameters:
  i - i a byte representation true if i is a valid octal digit

isTokenStart
final public static boolean isTokenStart(int i)(Code)
evaluate to true if i is a valid string token start.
Parameters:
  i - i a byte representation true if i is a valid string token start

isWhitespace
final public static boolean isWhitespace(int i)(Code)
evaluate to true if i is a valid whitespace.
See pdf spec "white space characters"

Parameters:
  i - i a byte representation true if i is a valid whitespace

lookaheadPop
protected COSObject lookaheadPop()(Code)
in order to read references we need a two object lookahead for the integer numbers this method pops the first object from the fifo structure. The topmost COSObjectin the object lookahead buffer.

lookaheadPush
protected void lookaheadPush(COSObject obj)(Code)
in order to read references we need a two object lookahead for the integer numbers this method pushes an object in the fifo structure.
Parameters:
  obj - The COSObjectto push in the buffer.

parseComment
protected void parseComment(IRandomAccess input) throws IOException(Code)
comment see PDF Reference v1.4, chapter 3.1.2 comments Comment ::= "%" anyChar EOL read until end of line.
throws:
  IOException -

parseElement
public Object parseElement(IRandomAccess input) throws IOException, COSLoadException(Code)
parse the basic elements from the current stream position.
see PDF Reference v1.4, chapter 3.2 Objects

COSObject ::= COSToken | COSBoolean | COSString | COSNumber | COSName | COSNull | COSArray | COSDictionary | COSStream
the object parsed
throws:
  IOException -
throws:
  COSLoadException -

parseHeader
public STDocType parseHeader(IRandomAccess input) throws IOException, COSLoadException(Code)
pdf header see PDF Reference v1.4, chapter 3.4.1 Header COSHEader ::= "%PDF-" version.
throws:
  IOException -
throws:
  COSLoadException -

parseObject
protected COSDocumentElement parseObject(IRandomAccess input) throws IOException, COSLoadException(Code)
Parse a valid COS object for use in document context from the current stream position.
see PDF Reference v1.4, chapter 3.2 Objects

this implementation is a little more complicated, as we hava a two object lookahead to detect references. COSObject ::= COSReference | COSBoolean | COSString | COSNumber | COSName | COSNull | COSArray | COSDictionary | COSStream
the object parsed
throws:
  IOException -
throws:
  COSLoadException -

parseObjectDictionary
protected COSObject parseObjectDictionary(IRandomAccess input) throws IOException, COSLoadException(Code)

parseOnObjectArray
protected COSObject parseOnObjectArray(IRandomAccess input) throws COSLoadException, IOException(Code)
parse a COS array from the current stream position. see PDF Reference v1.4, chapter 3.2.5 Array objects COSArray ::= "[" (COSObject) "]" the array parsed
throws:
  IOException -
throws:
  IOException -

parseOnObjectDictionary
protected COSObject parseOnObjectDictionary(IRandomAccess input) throws IOException, COSLoadException(Code)
parse a COS dictionary from the current stream position. see PDF Reference v1.4, chapter 3.2.6 Dictionary objects COSDictionary ::= "<<" (COSName COSObject)* ">>" the dictionary parsed
throws:
  IOException -
throws:
  COSLoadException -

parseOnObjectHexString
protected COSObject parseOnObjectHexString(IRandomAccess input, int next) throws IOException, COSLoadException(Code)
parse a COS string encoded in hex from the current stream position. see PDF Reference v1.4, chapter 3.2.3 String objects COSString ::= COSString | COSHexString COSHexString ::= "<" (hexChar)* ">" the string parsed
throws:
  IOException -
throws:
  COSLoadException -

parseOnObjectName
protected COSObject parseOnObjectName(IRandomAccess input) throws IOException, COSLoadException(Code)
parse a COS name from the current stream position. see PDF Reference v1.4, chapter 3.2.4 Name Objects COSName ::= "/" nameChars the name parsed
throws:
  IOException -
throws:
  COSLoadException -

parseOnObjectNumber
protected COSObject parseOnObjectNumber(IRandomAccess input, int next) throws IOException, COSLoadException(Code)
parse a COS number from the current stream position. see PDF Reference v1.4, chapter 3.2.2 Numeric objects COSNumber ::= COSFixed | COSInteger COSFixed ::= (+ | -)? (digit) "." (digit) COSInteger ::= (+ | -)? (digit) the number parsed
throws:
  IOException -
throws:
  COSLoadException -

parseOnObjectStream
protected COSObject parseOnObjectStream(IRandomAccess input, COSDictionary dict) throws IOException, COSLoadException(Code)
parse a COS stream from the current stream position. see PDF Reference v1.4, chapter 3.2.7 Stream objects COSStream ::= COSDictionary "stream" bytes "endstream"
Parameters:
  dict - The object that should be filled with the dictionary entries. The stream parsed.
throws:
  IOException -
throws:
  COSLoadException -

parseOnObjectStreamOrDictionary
protected COSObject parseOnObjectStreamOrDictionary(IRandomAccess input) throws IOException, COSLoadException(Code)
parse a COS stream or dictionary from the current stream position. COSStreamOrDict ::= COSStream | COSDict the object parsed
throws:
  IOException -
throws:
  COSLoadException -

parseOnObjectStreamOrDictionaryOrHexString
protected COSObject parseOnObjectStreamOrDictionaryOrHexString(IRandomAccess input) throws IOException, COSLoadException(Code)
parse a COS stream or dictionary or hex string from the current stream position. COSStreamOrDictOrHex ::= COSStream | COSDict | COSHexString the object parsed
throws:
  IOException -
throws:
  COSLoadException -

parseOnObjectString
protected COSObject parseOnObjectString(IRandomAccess input) throws IOException, COSLoadException(Code)
parse a COS string from the current stream position. see PDF Reference v1.4, chapter 3.2.3. String objects COSString ::= "(" stringData ")" the string parsed
throws:
  IOException -
throws:
  COSLoadException -

readEOL
protected boolean readEOL(IRandomAccess input) throws IOException(Code)
Consume whitespace. check if exactly a EOL sequence with no other whitespace around is available.
Parameters:
  input - true if EOL was found.
throws:
  IOException -

readEscape
protected int readEscape(IRandomAccess input) throws IOException(Code)
read an esacped char from the stream. the character corresponding to the escape code
throws:
  IOException -

readInteger
public int readInteger(IRandomAccess input, boolean consumeSpaceAfter) throws IOException(Code)
reads the next integer on input. consumes one trailing space if consumeSpaceAfter is set to true. Consumes leading spaces and comments.
Parameters:
  input -
Parameters:
  consumeSpaceAfter - The integer read.
throws:
  IOException -

readOctalChar
protected int readOctalChar(IRandomAccess input) throws IOException(Code)
read an octal character from the stream. the integer value of the character read or -1
throws:
  IOException -

readSpaces
public void readSpaces(IRandomAccess input) throws IOException(Code)
read all characters until EOF or non space char appears. the first non space char is pushed back so the next char read is the first non space char.
throws:
  IOException -

readStream
protected byte[] readStream(IRandomAccess input) throws IOException(Code)
Read all characters up to "endstream" and assume them belonging to the stream.
ATTENTION this is a heuristic approach as the tag "endstream" may be part of the stream data! All characters up to "endstream"
throws:
  IOException -

readToken
public byte[] readToken(IRandomAccess input) throws IOException(Code)
read a single token. the array of characters belonging to the token
throws:
  IOException -

readToken
public byte[] readToken(IRandomAccess input, List messages) throws IOException(Code)
derive of readToken, populates the messages list with non-fatal error messages
Parameters:
  input -
Parameters:
  messages - token bytes
throws:
  IOException -

readTokenElement
protected byte[] readTokenElement(IRandomAccess input, int next) throws IOException(Code)

readTokenElement
protected byte[] readTokenElement(IRandomAccess input, int next, List messages) throws IOException(Code)
derive of readToken, populates the messages list with non-fatal error messages
Parameters:
  input -
Parameters:
  next -
Parameters:
  messages - token bytes
throws:
  IOException -

setExceptionHandler
public void setExceptionHandler(IPDFParserExceptionHandler exceptionHandler)(Code)

setObjectKey
protected void setObjectKey(COSObjectKey objectKey)(Code)

setSecurityHandler
protected void setSecurityHandler(ISystemSecurityHandler securityHandler)(Code)

toCOSObject
public static COSObject toCOSObject(byte[] data) throws IOException, COSLoadException(Code)
parse the given byte array to a valid COSObject.
Parameters:
  data - a byte array containing COS encoded objects a COSObject
throws:
  IOException -
throws:
  COSLoadException -

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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