Package org.openpdf.text.pdf.parser

Class PdfTextLocator

java.lang.Object

org.openpdf.text.pdf.parser.PdfTextLocator

public class PdfTextLocator
extends Object

Locates text pattern coordinates inside a PDF file.

Since:

2.1.4

Field Summary

Fields

Modifier and Type	Field	Description
private final PdfReader	reader	The PdfReader that holds the PDF file.
private final TextAssembler	renderListener	The TextAssembler that will receive render notifications and provide resultant text

Constructor Summary

Constructors

Constructor	Description
PdfTextLocator(PdfReader reader)	Creates a new Text Locator object, using a TextAssembler as the render listener
PdfTextLocator(PdfReader reader, boolean usePdfMarkupElements)	Creates a new Text Extractor object, using a TextAssembler as the render listener
PdfTextLocator(PdfReader reader, TextAssembler renderListener)	Creates a new Text Locator object.

Method Summary

Modifier and Type	Method	Description
private byte[]	getContentBytesForPage(int pageNum)	Gets the content bytes of a page.
private byte[]	getContentBytesFromContentObject(PdfObject contentObject)	Gets the content bytes from a content object, which may be a reference a stream or an array.
void	processContent(byte[] contentBytes, PdfDictionary resources, PdfContentTextLocator handler)	Processes PDF syntax
List<MatchedPattern>	searchFile(float[] coordinates)	Locates text within a bounding box inside a PDF
List<MatchedPattern>	searchFile(String pattern)	Locates text pattern inside a PDF
List<MatchedPattern>	searchPage(int page, float[] coordinates)	Locates text within a bounding box inside a page
List<MatchedPattern>	searchPage(int page, String pattern)	Locates text pattern inside a page

Methods inherited from class java.lang.Object

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

Field Details

reader

private final PdfReader reader

The PdfReader that holds the PDF file.

renderListener

private final TextAssembler renderListener

The TextAssembler that will receive render notifications and provide resultant text

Constructor Details

PdfTextLocator

public PdfTextLocator(PdfReader reader)

Creates a new Text Locator object, using a TextAssembler as the render listener

Parameters:

reader - the reader with the PDF

PdfTextLocator

public PdfTextLocator(PdfReader reader,
 boolean usePdfMarkupElements)

Creates a new Text Extractor object, using a TextAssembler as the render listener

Parameters:

reader - the reader with the PDF

usePdfMarkupElements - should we use higher level tags for PDF markup entities?

PdfTextLocator

public PdfTextLocator(PdfReader reader,
 TextAssembler renderListener)

Creates a new Text Locator object.

Parameters:

reader - the reader with the PDF

renderListener - the render listener that will be used to analyze renderText operations and provide resultant text

Method Details

getContentBytesForPage

private byte[] getContentBytesForPage(int pageNum)
                               throws IOException

Gets the content bytes of a page.

Parameters:

pageNum - the 1-based page number of page you want get the content stream from

Returns:

a byte array with the effective content stream of a page

Throws:

IOException

getContentBytesFromContentObject

private byte[] getContentBytesFromContentObject(PdfObject contentObject)
                                         throws IOException

Gets the content bytes from a content object, which may be a reference a stream or an array.

Parameters:

contentObject - the object to read bytes from

Returns:

the content bytes

Throws:

IOException

searchPage

public List<MatchedPattern> searchPage(int page,
 String pattern)
                                throws IOException

Locates text pattern inside a page

Parameters:

page - page number we are interested in

pattern - text to match

Returns:

ArrayList List of matched text patterns with coordinates.

Throws:

IOException - on error

searchFile

public List<MatchedPattern> searchFile(String pattern)
                                throws IOException

Locates text pattern inside a PDF

Parameters:

pattern - text to match

Returns:

ArrayList List of matched text patterns with coordinates.

Throws:

IOException - on error

searchPage

public List<MatchedPattern> searchPage(int page,
 float[] coordinates)
                                throws IOException

Locates text within a bounding box inside a page

Parameters:

page - page number we are interested in

coordinates - bounding box to extract text from

Returns:

ArrayList List of matched text patterns with coordinates.

Throws:

IOException - on error

searchFile

public List<MatchedPattern> searchFile(float[] coordinates)
                                throws IOException

Locates text within a bounding box inside a PDF

Parameters:

coordinates - bounding box to extract text from

Returns:

ArrayList List of matched text patterns with coordinates.

Throws:

IOException - on error

processContent

public void processContent(byte[] contentBytes,
 PdfDictionary resources,
 PdfContentTextLocator handler)

Processes PDF syntax

Parameters:

contentBytes - the bytes of a content stream

resources - the resources that come with the content stream

handler - interprets events caused by recognition of operations in a content stream.