Package org.apache.tika.parser.external

Class ExternalParser

java.lang.Object
org.apache.tika.parser.external.ExternalParser
All Implemented Interfaces:
Serializable, Parser
Direct Known Subclasses:
TensorflowImageRecParser
public class ExternalParser extends Object implements Parser
Parser that uses an external program (like catdoc or pdf2txt) to extract text content and metadata from a given document.
See Also:

  • Field Details

    • INPUT_FILE_TOKEN

      public static final String INPUT_FILE_TOKEN
      The token, which if present in the Command string, will be replaced with the input filename. Alternately, the input data can be streamed over STDIN.
      See Also:

    • OUTPUT_FILE_TOKEN

      public static final String OUTPUT_FILE_TOKEN
      The token, which if present in the Command string, will be replaced with the output filename. Alternately, the output data can be collected on STDOUT.
      See Also:

  • Constructor Details

    • ExternalParser

      public ExternalParser()

  • Method Details

    • check

      public static boolean check(String checkCmd, int... errorValue)
      Checks to see if the command can be run. Typically used with something like "myapp --version" to check to see if "myapp" is installed and on the path.
      Parameters:
      checkCmd - The check command to run
      errorValue - What is considered an error value?

    • check

      public static boolean check(String[] checkCmd, int... errorValue)

    • 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

    • getSupportedTypes

      public Set<MediaType> getSupportedTypes()

    • setSupportedTypes

      public void setSupportedTypes(Set<MediaType> supportedTypes)

    • getCommand

      public String[] getCommand()

    • setCommand

      public void setCommand(String... command)
      Sets the command to be run. This can include either of INPUT_FILE_TOKEN or OUTPUT_FILE_TOKEN if the command needs filenames.
      See Also:

    • getIgnoredLineConsumer

      public ExternalParser.LineConsumer getIgnoredLineConsumer()
      Gets lines consumer
      Returns:
      consumer instance

    • setIgnoredLineConsumer

      public void setIgnoredLineConsumer(ExternalParser.LineConsumer ignoredLineConsumer)
      Set a consumer for the lines ignored by the parse functions
      Parameters:
      ignoredLineConsumer - consumer instance

    • getMetadataExtractionPatterns

      public Map<Pattern,String> getMetadataExtractionPatterns()

    • setMetadataExtractionPatterns

      public void setMetadataExtractionPatterns(Map<Pattern,String> patterns)
      Sets the map of regular expression patterns and Metadata keys. Any matching patterns will have the matching metadata entries set. Set this to null to disable Metadata extraction.

    • parse

      public void parse(InputStream stream, ContentHandler handler, Metadata metadata, ParseContext context) throws IOException, SAXException, TikaException
      Executes the configured external command and passes the given document stream as a simple XHTML document to the given SAX content handler. Metadata is only extracted if setMetadataExtractionPatterns(Map) has been called to set patterns.
      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