org.apache.tika.parser.html
Class HtmlParser

java.lang.Object
  org.apache.tika.parser.AbstractParser
      org.apache.tika.parser.html.HtmlParser

All Implemented Interfaces:

java.io.Serializable, Parser

public class HtmlParser
extends AbstractParser

HTML parser. Uses TagSoup to turn the input document to HTML SAX events, and post-processes the events to produce XHTML and metadata expected by Tika clients.

See Also:

Serialized Form

Constructor Summary

HtmlParser()

Method Summary

java.util.Set<MediaType>	getSupportedTypes(ParseContext context) Returns the set of media types supported by this parser when used with the given parse context.
protected boolean	isDiscardElement(java.lang.String name) Deprecated. Use the HtmlMapper mechanism to customize the HTML mapping. This method will be removed in Tika 1.0.
java.lang.String	mapSafeAttribute(java.lang.String elementName, java.lang.String attributeName) Deprecated. Use the HtmlMapper mechanism to customize the HTML mapping. This method will be removed in Tika 1.0.
protected java.lang.String	mapSafeElement(java.lang.String name) Deprecated. Use the HtmlMapper mechanism to customize the HTML mapping. This method will be removed in Tika 1.0.
void	parse(java.io.InputStream stream, org.xml.sax.ContentHandler handler, Metadata metadata, ParseContext context) Parses a document stream into a sequence of XHTML SAX events.

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

Constructor Detail

HtmlParser

public HtmlParser()

Method Detail

getSupportedTypes

public java.util.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(java.io.InputStream stream,
                  org.xml.sax.ContentHandler handler,
                  Metadata metadata,
                  ParseContext context)
           throws java.io.IOException,
                  org.xml.sax.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.

Parameters:

stream - the document stream (input)

handler - handler for the XHTML SAX events (output)

metadata - document metadata (input and output)

context - parse context

Throws:

java.io.IOException - if the document stream could not be read

org.xml.sax.SAXException - if the SAX events could not be processed

TikaException - if the document could not be parsed

mapSafeElement

protected java.lang.String mapSafeElement(java.lang.String name)

Deprecated. Use the HtmlMapper mechanism to customize the HTML mapping. This method will be removed in Tika 1.0.

Maps "safe" HTML element names to semantic XHTML equivalents. If the given element is unknown or deemed unsafe for inclusion in the parse output, then this method returns null and the element will be ignored but the content inside it is still processed. See the isDiscardElement(String) method for a way to discard the entire contents of an element.

Subclasses can override this method to customize the default mapping.

Parameters:

name - HTML element name (upper case)

Returns:

XHTML element name (lower case), or null if the element is unsafe

Since:

Apache Tika 0.5

isDiscardElement

protected boolean isDiscardElement(java.lang.String name)

Deprecated. Use the HtmlMapper mechanism to customize the HTML mapping. This method will be removed in Tika 1.0.

Checks whether all content within the given HTML element should be discarded instead of including it in the parse output. Subclasses can override this method to customize the set of discarded elements.

Parameters:

name - HTML element name (upper case)

Returns:

true if content inside the named element should be ignored, false otherwise

Since:

Apache Tika 0.5

mapSafeAttribute

public java.lang.String mapSafeAttribute(java.lang.String elementName,
                                         java.lang.String attributeName)

Deprecated. Use the HtmlMapper mechanism to customize the HTML mapping. This method will be removed in Tika 1.0.