Package org.apache.tika.parser

Class DelegatingParser

java.lang.Object

org.apache.tika.parser.AbstractParser

org.apache.tika.parser.DelegatingParser

All Implemented Interfaces:

Serializable, Parser

Direct Known Subclasses:

CryptoParser

public class DelegatingParser
extends AbstractParser

Base class for parser implementations that want to delegate parts of the task of parsing an input document to another parser. The delegate parser is looked up from the parsing context using the Parser class as the key.

Since:

Apache Tika 0.4, major changes in Tika 0.5

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
DelegatingParser()

Method Summary

Modifier and Type	Method	Description
Set<MediaType>	getSupportedTypes(ParseContext context)	Returns the set of media types supported by this parser when used with the given parse context.
void	parse(InputStream stream, ContentHandler handler, Metadata metadata, ParseContext context)	Looks up the delegate parser from the parsing context and delegates the parse operation to it.

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

parse

Methods inherited from class java.lang.Object

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

Constructor Details

DelegatingParser

public DelegatingParser()

Method Details

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.

Parameters:

context - parse context

Returns:

immutable set of media types

parse

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

Looks up the delegate parser from the parsing context and delegates the parse operation to it. If a delegate parser is not found, then an empty XHTML document is returned.

Subclasses should override this method to parse the top level structure of the given document stream. Parsed sub-streams can be passed to this base class method to be parsed by the configured delegate 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:

SAXException - if the SAX events could not be processed

IOException - if the document stream could not be read

TikaException - if the document could not be parsed