org.apache.pdfbox.pdfparser

Class ConformingPDFParser

java.lang.Object

org.apache.pdfbox.pdfparser.BaseParser

org.apache.pdfbox.pdfparser.ConformingPDFParser

public class ConformingPDFParser
extends BaseParser

Author:

Adam Nichols

Field Summary

Fields

Modifier and Type	Field and Description
protected RandomAccess	inputFile

Fields inherited from class org.apache.pdfbox.pdfparser.BaseParser

DEF, document, ENDOBJ, ENDSTREAM, forceParsing, pdfSource, PROP_PUSHBACK_SIZE

Constructor Summary

Constructors

Constructor and Description
ConformingPDFParser(File inputFile) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
protected byte	consumeWhitespace() This will read all bytes until a non-whitespace character is found.
protected byte	consumeWhitespaceBackwards() This will read all bytes (backwards) until a non-whitespace character is found.
COSDocument	getDocument() This will get the document that was parsed.
COSBase	getObject(long objectNumber, long generation)
PDDocument	getPDDocument() This will get the PD document that was parsed.
boolean	isRecursivlyRead()
void	parse() This will parse the stream and populate the COSDocument object.
protected COSNumber	parseNumber(String number)
protected long	parseTrailerInformation()
protected COSBase	processCosObject(String string)
protected String	readBackwardUntilWhitespace()
protected byte	readByte()
protected byte	readByteBackwards()
protected COSDictionary	readDictionaryBackwards()
protected int	readInt() This will read an integer from the stream.
protected String	readLine() This will read a line starting with the byte at offset and going forward until it finds a newline.
protected String	readLineBackwards() This will read a line starting with the byte at offset and going backwards until it finds a newline.
protected long	readLongBackwards() This will consume any whitespace, read in bytes until whitespace is found again and then parse the characters which have been read as a long.
protected COSName	readNameBackwards()
protected COSNumber	readNumber() This will read in a number and return the COS version of the number (be it a COSInteger or a COSFloat).
protected COSBase	readObject() This actually reads the object data.
COSBase	readObject(long objectNumber, long generation) This will read an object from the inputFile at whatever our currentOffset is.
protected COSBase	readObjectBackwards()
protected String	readString() This will read the next string from the stream.
protected String	readWord()
void	setRecursivlyRead(boolean recursivlyRead)

Methods inherited from class org.apache.pdfbox.pdfparser.BaseParser

clearResources, isClosing, isClosing, isEndOfName, isEOL, isEOL, isWhitespace, isWhitespace, parseBoolean, parseCOSArray, parseCOSDictionary, parseCOSName, parseCOSStream, parseCOSString, parseCOSString, parseDirObject, readExpectedString, readGenerationNumber, readLong, readObjectNumber, readString, readStringNumber, readUntilEndStream, setDocument, skipSpaces

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

inputFile

protected RandomAccess inputFile

Constructor Detail

ConformingPDFParser

public ConformingPDFParser(File inputFile)
                    throws IOException

Constructor.

Parameters:

inputFile - The input stream that contains the PDF document.

Throws:

IOException - If there is an error initializing the stream.

Method Detail

parse

public void parse()
           throws IOException

This will parse the stream and populate the COSDocument object. This will close the stream when it is done parsing.

Throws:

IOException - If there is an error reading from the stream or corrupt data is found.

getDocument

public COSDocument getDocument()
                        throws IOException

This will get the document that was parsed. parse() must be called before this is called. When you are done with this document you must call close() on it to release resources.

Returns:

The document that was parsed.

Throws:

IOException - If there is an error getting the document.

getPDDocument

public PDDocument getPDDocument()
                         throws IOException

This will get the PD document that was parsed. When you are done with this document you must call close() on it to release resources.

Returns:

The document at the PD layer.

Throws:

IOException - If there is an error getting the document.

parseTrailerInformation

protected long parseTrailerInformation()
                                throws IOException,
                                       NumberFormatException

Throws:

IOException

NumberFormatException

readByteBackwards

protected byte readByteBackwards()
                          throws IOException

Throws:

IOException

readByte

protected byte readByte()
                 throws IOException

Throws:

IOException

readBackwardUntilWhitespace

protected String readBackwardUntilWhitespace()
                                      throws IOException

Throws:

IOException

consumeWhitespaceBackwards

protected byte consumeWhitespaceBackwards()
                                   throws IOException

This will read all bytes (backwards) until a non-whitespace character is found. To save you an extra read, the non-whitespace character is returned. If the current character is not whitespace, this method will just return the current char.

Returns:

the first non-whitespace character found

Throws:

IOException - if there is an error reading from the file

consumeWhitespace

protected byte consumeWhitespace()
                          throws IOException

This will read all bytes until a non-whitespace character is found. To save you an extra read, the non-whitespace character is returned. If the current character is not whitespace, this method will just return the current char.

Returns:

the first non-whitespace character found

Throws:

IOException - if there is an error reading from the file

readLongBackwards

protected long readLongBackwards()
                          throws IOException,
                                 NumberFormatException

This will consume any whitespace, read in bytes until whitespace is found again and then parse the characters which have been read as a long. The current offset will then point at the first whitespace character which preceeds the number.

Returns:

the parsed number

Throws:

IOException - if there is an error reading from the file

NumberFormatException - if the bytes read can not be converted to a number

readInt

protected int readInt()
               throws IOException

Description copied from class: BaseParser

This will read an integer from the stream.

Overrides:

readInt in class BaseParser

Returns:

The integer that was read from the stream.

Throws:

IOException - If there is an error reading from the stream.

readNumber

protected COSNumber readNumber()
                        throws IOException

This will read in a number and return the COS version of the number (be it a COSInteger or a COSFloat).

Returns:

the COSNumber which was read/parsed

Throws:

IOException

parseNumber

protected COSNumber parseNumber(String number)
                         throws IOException

Throws:

IOException

processCosObject

protected COSBase processCosObject(String string)
                            throws IOException

Throws:

IOException

readObjectBackwards

protected COSBase readObjectBackwards()
                               throws IOException

Throws:

IOException

readNameBackwards

protected COSName readNameBackwards()
                             throws IOException

Throws:

IOException

getObject

public COSBase getObject(long objectNumber,
                long generation)
                  throws IOException

Throws:

IOException

readObject

public COSBase readObject(long objectNumber,
                 long generation)
                   throws IOException

This will read an object from the inputFile at whatever our currentOffset is. If the object and generation are not the expected values and this object is set to throw an exception for non-conforming documents, then an exception will be thrown.

Parameters:

objectNumber - the object number you expect to read

generation - the generation you expect this object to be

Returns:

the object being read.

Throws:

IOException

readObject

protected COSBase readObject()
                      throws IOException

This actually reads the object data.

Returns:

the object which is read

Throws:

IOException

readString

protected String readString()
                     throws IOException

This will read the next string from the stream.

Overrides:

readString in class BaseParser

Returns:

The string that was read from the stream.

Throws:

IOException - If there is an error reading from the stream.

readDictionaryBackwards

protected COSDictionary readDictionaryBackwards()
                                         throws IOException

Throws:

IOException

readLineBackwards

protected String readLineBackwards()
                            throws IOException

This will read a line starting with the byte at offset and going backwards until it finds a newline. This should only be used if we are certain that the data will only be text, and not binary data.

Returns:

the string which was read

Throws:

IOException - if there was an error reading data from the file

readLine

protected String readLine()
                   throws IOException

This will read a line starting with the byte at offset and going forward until it finds a newline. This should only be used if we are certain that the data will only be text, and not binary data.

Overrides:

readLine in class BaseParser

Returns:

the string which was read

Throws:

IOException - if there was an error reading data from the file

readWord

protected String readWord()
                   throws IOException

Throws:

IOException

isRecursivlyRead

public boolean isRecursivlyRead()

Returns:

the recursivlyRead

setRecursivlyRead

public void setRecursivlyRead(boolean recursivlyRead)

Parameters:

recursivlyRead - the recursivlyRead to set