org.apache.tika.parser.pdf

Class PDFParser

java.lang.Object

org.apache.tika.parser.AbstractParser

org.apache.tika.parser.pdf.PDFParser

All Implemented Interfaces:

Serializable, Initializable, Parser

Direct Known Subclasses:

PDFPreflightParser

public class PDFParser
extends AbstractParser
implements Initializable

PDF parser.

This parser can process also encrypted PDF documents if the required password is given as a part of the input metadata associated with a document. If no password is given, then this parser will try decrypting the document using the empty password that's often used with PDFs. If the PDF contains any embedded documents (for example as part of a PDF package) then this parser will use the EmbeddedDocumentExtractor to handle them.

As of Tika 1.6, it is possible to extract inline images with the EmbeddedDocumentExtractor as if they were regular attachments. By default, this feature is turned off because of the potentially enormous number and size of inline images. To turn this feature on, see PDFParserConfig.setExtractInlineImages(boolean).

Please note that tables are not stored as entities within PDFs. It takes significant computation to identify and then correctly extract tables from PDFs. As of this writing, the PDFParser extracts text within tables, but it does not compute table cell boundaries or table row boundaries. Please see tabula for one project that tries to maintain the structure of tables represented in PDFs.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	PASSWORD Deprecated. Supply a PasswordProvider on the ParseContext instead

Constructor Summary

Constructors

Constructor and Description
PDFParser()

Method Summary

Modifier and Type	Method and Description
void	checkInitialization(InitializableProblemHandler handler)
boolean	getEnableAutoSpace()
boolean	getExtractAnnotationText() Deprecated. use getPDFParserConfig()
protected org.apache.pdfbox.pdmodel.PDDocument	getPDDocument(InputStream inputStream, String password, org.apache.pdfbox.io.MemoryUsageSetting memoryUsageSetting, Metadata metadata, ParseContext parseContext)
protected org.apache.pdfbox.pdmodel.PDDocument	getPDDocument(Path path, String password, org.apache.pdfbox.io.MemoryUsageSetting memoryUsageSetting, Metadata metadata, ParseContext parseContext)
PDFParserConfig	getPDFParserConfig()
boolean	getSortByPosition() Deprecated. use getPDFParserConfig()
Set<MediaType>	getSupportedTypes(ParseContext context) Returns the set of media types supported by this parser when used with the given parse context.
boolean	getSuppressDuplicateOverlappingText() Deprecated. use getPDFParserConfig()
void	initialize(Map<String,Param> params) This is a no-op.
void	parse(InputStream stream, ContentHandler handler, Metadata metadata, ParseContext context) Parses a document stream into a sequence of XHTML SAX events.
void	setDropThreshold(float dropThreshold)
void	setEnableAutoSpace(boolean v) If true (the default), the parser should estimate where spaces should be inserted between words.
void	setExtractAnnotationText(boolean v) If true (the default), text in annotations will be extracted.
void	setInitializableProblemHandler(InitializableProblemHandler initializableProblemHandler)
void	setMaxMainMemoryBytes(long maxMainMemoryBytes)
void	setOcrImageType(String imageType)
void	setOcrStrategy(String ocrStrategyString)
void	setPDFParserConfig(PDFParserConfig config)
void	setSortByPosition(boolean v) If true, sort text tokens by their x/y position before extracting text.
void	setSuppressDuplicateOverlappingText(boolean v) If true, the parser should try to remove duplicated text over the same region.

Methods inherited from class org.apache.tika.parser.AbstractParser

parse

Methods inherited from class java.lang.Object

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

Field Detail

PASSWORD

public static final String PASSWORD

Deprecated. Supply a PasswordProvider on the ParseContext instead

Metadata key for giving the document password to the parser.

Since:

Apache Tika 0.5

See Also:

Constant Field Values

Constructor Detail

PDFParser

public PDFParser()

Method Detail

getSupportedTypes

public Set<MediaType> getSupportedTypes(ParseContext context)

Description copied from interface: Parser

Returns the set of media types supported by this parser when used with the given parse context.

Specified by:

getSupportedTypes in interface Parser

Parameters:

context - parse context

Returns:

immutable set of media types

parse

public void parse(InputStream stream,
                  ContentHandler handler,
                  Metadata metadata,
                  ParseContext context)
           throws IOException,
                  SAXException,
                  TikaException

Description copied from interface: Parser

Parses a document stream into a sequence of XHTML SAX events. Fills in related document metadata in the given metadata object.

The given document stream is consumed but not closed by this method. The responsibility to close the stream remains on the caller.

Information about the parsing context can be passed in the context parameter. See the parser implementations for the kinds of context information they expect.

Specified by:

parse in interface Parser

Parameters:

stream - the document stream (input)

handler - handler for the XHTML SAX events (output)

metadata - document metadata (input and output)

context - parse context

Throws:

IOException - if the document stream could not be read

SAXException - if the SAX events could not be processed

TikaException - if the document could not be parsed

getPDDocument

protected org.apache.pdfbox.pdmodel.PDDocument getPDDocument(InputStream inputStream,
                                                             String password,
                                                             org.apache.pdfbox.io.MemoryUsageSetting memoryUsageSetting,
                                                             Metadata metadata,
                                                             ParseContext parseContext)
                                                      throws IOException

Throws:

IOException

getPDDocument

protected org.apache.pdfbox.pdmodel.PDDocument getPDDocument(Path path,
                                                             String password,
                                                             org.apache.pdfbox.io.MemoryUsageSetting memoryUsageSetting,
                                                             Metadata metadata,
                                                             ParseContext parseContext)
                                                      throws IOException

Throws:

IOException

getPDFParserConfig

public PDFParserConfig getPDFParserConfig()

setPDFParserConfig

public void setPDFParserConfig(PDFParserConfig config)

getEnableAutoSpace

public boolean getEnableAutoSpace()

See Also:

setEnableAutoSpace(boolean)

setEnableAutoSpace

@Field
public void setEnableAutoSpace(boolean v)

If true (the default), the parser should estimate where spaces should be inserted between words. For many PDFs this is necessary as they do not include explicit whitespace characters.

getExtractAnnotationText

public boolean getExtractAnnotationText()

Deprecated. use getPDFParserConfig()

If true, text in annotations will be extracted.

setExtractAnnotationText

@Field
public void setExtractAnnotationText(boolean v)

If true (the default), text in annotations will be extracted.

getSuppressDuplicateOverlappingText

public boolean getSuppressDuplicateOverlappingText()

Deprecated. use getPDFParserConfig()

See Also:

setSuppressDuplicateOverlappingText(boolean)

setSuppressDuplicateOverlappingText

@Field
public void setSuppressDuplicateOverlappingText(boolean v)

If true, the parser should try to remove duplicated text over the same region. This is needed for some PDFs that achieve bolding by re-writing the same text in the same area. Note that this can slow down extraction substantially (PDFBOX-956) and sometimes remove characters that were not in fact duplicated (PDFBOX-1155). By default this is disabled.

getSortByPosition

public boolean getSortByPosition()

Deprecated. use getPDFParserConfig()

See Also:

setSortByPosition(boolean)

setSortByPosition

@Field
public void setSortByPosition(boolean v)

If true, sort text tokens by their x/y position before extracting text. This may be necessary for some PDFs (if the text tokens are not rendered "in order"), while for othe6 -- Add FileProfilerr PDFs it can produce the wrong result (for example if there are 2 columns, the text will be interleaved). Default is false.

setOcrStrategy

@Field
public void setOcrStrategy(String ocrStrategyString)

setOcrImageType

@Field
public void setOcrImageType(String imageType)

setInitializableProblemHandler

public void setInitializableProblemHandler(InitializableProblemHandler initializableProblemHandler)

setDropThreshold

@Field
public void setDropThreshold(float dropThreshold)

setMaxMainMemoryBytes

@Field
public void setMaxMainMemoryBytes(long maxMainMemoryBytes)

initialize

public void initialize(Map<String,Param> params)
                throws TikaConfigException

This is a no-op. There is no need to initialize multiple fields. The regular field loading should happen without this.

Specified by:

initialize in interface Initializable

Parameters:

params - params to use for initialization

Throws:

TikaConfigException

checkInitialization

public void checkInitialization(InitializableProblemHandler handler)
                         throws TikaConfigException

Specified by:

checkInitialization in interface Initializable

Parameters:

handler - if there is a problem and no custom initializableProblemHandler has been configured via Initializable parameters, this is called to respond.

Throws:

TikaConfigException