PDFXrefStreamParser

java.lang.Object
- org.apache.pdfbox.pdfparser.BaseParser
- - org.apache.pdfbox.pdfparser.PDFXrefStreamParser

```
public class PDFXrefStreamParser
extends BaseParser
```
This will parse a PDF 1.5 (or better) Xref stream and extract the xref information from the stream.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

private static class PDFXrefStreamParser.ObjectNumbers

Field Summary

Fields
Modifier and Type Field Description

private PDFXrefStreamParser.ObjectNumbers objectNumbers

private int[] w
- Fields inherited from class org.apache.pdfbox.pdfparser.BaseParser
  A, ASCII_CR, ASCII_LF, B, D, DEF, document, E, ENDOBJ_STRING, ENDSTREAM_STRING, J, M, MAX_LENGTH_LONG, N, O, R, S, source, STREAM_STRING, T

Constructor Summary

Constructors
Constructor Description

PDFXrefStreamParser(COSStream stream, COSDocument document)
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`private void`	`close()`
`private void`	`initParserValues(COSStream stream)`
`void`	`parse(XrefTrailerResolver resolver)`	Parses through the unfiltered stream and populates the xrefTable HashMap.
`private long`	`parseValue(byte[] data, int start, int length)`
`private void`	`readNextValue(byte[] value)`

Methods inherited from class org.apache.pdfbox.pdfparser.BaseParser
getObjectKey, isClosing, isClosing, isDigit, isDigit, isEndOfName, isEOF, isEOL, isEOL, isSpace, isSpace, isWhitespace, isWhitespace, parseCOSArray, parseCOSDictionary, parseCOSName, parseCOSString, parseDirObject, readExpectedChar, readExpectedString, readGenerationNumber, readInt, readLine, readLong, readObjectNumber, readString, readString, readStringNumber, skipLinebreak, skipSpaces, skipWhiteSpaces

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

w
```
private final int[] w
```

objectNumbers

private PDFXrefStreamParser.ObjectNumbers objectNumbers

Constructor Detail
- PDFXrefStreamParser
```
public PDFXrefStreamParser(COSStream stream,
                           COSDocument document)
                    throws java.io.IOException
```
  Constructor.
  
  Parameters:
  
  stream - The stream to parse.
  
  document - The document for the current parsing.
  
  Throws:
  
  java.io.IOException - If there is an error initializing the stream.

Method Detail

initParserValues

private void initParserValues(COSStream stream)
                       throws java.io.IOException

Throws:: java.io.IOException

close

private void close()
            throws java.io.IOException

Throws:: java.io.IOException

parse
```
public void parse(XrefTrailerResolver resolver)
           throws java.io.IOException
```
Parses through the unfiltered stream and populates the xrefTable HashMap.

Parameters:

resolver - resolver to read the xref/trailer information

Throws:

java.io.IOException - If there is an error while parsing the stream.

readNextValue

private void readNextValue(byte[] value)
                    throws java.io.IOException

Throws:: java.io.IOException

parseValue

private long parseValue(byte[] data,
                        int start,
                        int length)