org.apache.any23.extractor.rdfa
Class RDFa11Parser

java.lang.Object
  org.apache.any23.extractor.rdfa.RDFa11Parser

public class RDFa11Parser
extends Object

This parser is able to extract RDFa 1.0 and RDFa 1.1 statements from any (X)HTML document.

Author:

Michele Mostarda (mostarda@fbk.eu)

Field Summary

static String	ABOUT_ATTRIBUTE
static String	BODY_TAG
static String	CONTENT_ATTRIBUTE
static String	CURIE_SEPARATOR
static String	DATATYPE_ATTRIBUTE
static String	HEAD_TAG
static String	HREF_ATTRIBUTE
static String	PREFIX_ATTRIBUTE
static String	PROFILE_ATTRIBUTE
static String	PROPERTY_ATTRIBUTE
static String	REL_ATTRIBUTE
static String	RESOURCE_ATTRIBUTE
static String	REV_ATTRIBUTE
static String	SRC_ATTRIBUTE
static String[]	SUBJECT_ATTRIBUTES
static String	TYPEOF_ATTRIBUTE
static String	URI_PATH_SEPARATOR
static char	URI_PREFIX_SEPARATOR
static String	URI_SCHEMA_SEPARATOR
static String	VOCAB_ATTRIBUTE
static String	XML_LANG_ATTRIBUTE
static String	XML_LITERAL_DATATYPE
static String	XMLNS_ATTRIBUTE
static String	XMLNS_DEFAULT

Constructor Summary

RDFa11Parser()

Method Summary

protected static String[]	extractPrefixSections(String prefixesDeclaration) Given a prefix declaration returns a list of prefixID:prefixURL strings normalizing blanks where present.
protected static org.openrdf.model.Literal	getAsPlainLiteral(Node node, String currentLanguage)
protected static org.openrdf.model.Literal	getAsXMLLiteral(Node node)
protected static URL	getDocumentBase(URL documentURL, Document document)
protected org.openrdf.model.URI	getMapping(String prefix) Returns a URI mapping for a given prefix.
protected static boolean	isAbsoluteURI(String uri)
protected static boolean	isCURIE(String curie)
protected static boolean	isCURIEBNode(String curie)
protected static boolean	isRelativeNode(Node node)
protected static boolean	isXMLNSDeclared(Document document)
void	processDocument(URL documentURL, Document document, ExtractionResult extractionResult) RDFa Syntax - Processing Model.
void	reset() Resets the parser to the original state.
protected org.openrdf.model.Resource	resolveCURIEOrURI(String curieOrURI, boolean termAllowed) Resolves a CURIE or URI string.
protected org.openrdf.model.URI[]	resolveCurieOrURIList(Node n, String curieOrURIList, boolean termAllowed) Resolves a whitelist separated list of CURIE or URI.
protected org.openrdf.model.URI	resolveURI(String uriStr) Resolves a URI string as URI.
protected void	updateURIMapping(Node node) Updates the URI mapping with the XMLNS attributes declared in the current node.
protected void	updateVocabulary(Node currentNode) Updates the vocabulary context with possible @vocab declarations.

Methods inherited from class java.lang.Object

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

Field Detail

CURIE_SEPARATOR

public static final String CURIE_SEPARATOR

See Also:

Constant Field Values

URI_PREFIX_SEPARATOR

public static final char URI_PREFIX_SEPARATOR

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Constant Field Values

URI_SCHEMA_SEPARATOR

public static final String URI_SCHEMA_SEPARATOR

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Constant Field Values

URI_PATH_SEPARATOR

public static final String URI_PATH_SEPARATOR

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Constant Field Values

HEAD_TAG

public static final String HEAD_TAG

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Constant Field Values

BODY_TAG

public static final String BODY_TAG

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Constant Field Values

XMLNS_ATTRIBUTE

public static final String XMLNS_ATTRIBUTE

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Constant Field Values

XML_LANG_ATTRIBUTE

public static final String XML_LANG_ATTRIBUTE

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Constant Field Values

REL_ATTRIBUTE

public static final String REL_ATTRIBUTE

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Constant Field Values

REV_ATTRIBUTE

public static final String REV_ATTRIBUTE

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Constant Field Values

ABOUT_ATTRIBUTE

public static final String ABOUT_ATTRIBUTE

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Constant Field Values

RESOURCE_ATTRIBUTE

public static final String RESOURCE_ATTRIBUTE

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Constant Field Values

SRC_ATTRIBUTE

public static final String SRC_ATTRIBUTE

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Constant Field Values

HREF_ATTRIBUTE

public static final String HREF_ATTRIBUTE

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Constant Field Values

SUBJECT_ATTRIBUTES

public static final String[] SUBJECT_ATTRIBUTES

PREFIX_ATTRIBUTE

public static final String PREFIX_ATTRIBUTE

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Constant Field Values

TYPEOF_ATTRIBUTE

public static final String TYPEOF_ATTRIBUTE

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Constant Field Values

PROPERTY_ATTRIBUTE

public static final String PROPERTY_ATTRIBUTE

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Constant Field Values

DATATYPE_ATTRIBUTE

public static final String DATATYPE_ATTRIBUTE

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Constant Field Values

CONTENT_ATTRIBUTE

public static final String CONTENT_ATTRIBUTE

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Constant Field Values

VOCAB_ATTRIBUTE

public static final String VOCAB_ATTRIBUTE

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Constant Field Values

PROFILE_ATTRIBUTE

public static final String PROFILE_ATTRIBUTE

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Constant Field Values

XML_LITERAL_DATATYPE

public static final String XML_LITERAL_DATATYPE

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Constant Field Values

XMLNS_DEFAULT

public static final String XMLNS_DEFAULT

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Constant Field Values

Constructor Detail

RDFa11Parser

public RDFa11Parser()

Method Detail

getDocumentBase

protected static URL getDocumentBase(URL documentURL,
                                     Document document)
                              throws MalformedURLException

Throws:

MalformedURLException

extractPrefixSections

protected static String[] extractPrefixSections(String prefixesDeclaration)

Given a prefix declaration returns a list of prefixID:prefixURL strings normalizing blanks where present.

Parameters:

prefixesDeclaration -

Returns:

isAbsoluteURI

protected static boolean isAbsoluteURI(String uri)

isCURIE

protected static boolean isCURIE(String curie)

isCURIEBNode

protected static boolean isCURIEBNode(String curie)

isRelativeNode

protected static boolean isRelativeNode(Node node)

getAsPlainLiteral

protected static org.openrdf.model.Literal getAsPlainLiteral(Node node,
                                                             String currentLanguage)

getAsXMLLiteral

protected static org.openrdf.model.Literal getAsXMLLiteral(Node node)
                                                    throws IOException,
                                                           TransformerException

Throws:

IOException

TransformerException

isXMLNSDeclared

protected static boolean isXMLNSDeclared(Document document)

processDocument

public void processDocument(URL documentURL,
                            Document document,
                            ExtractionResult extractionResult)
                     throws RDFa11ParserException

RDFa Syntax - Processing Model.

Parameters:

documentURL -

extractionResult -

document -

Throws:

RDFa11ParserException

reset

public void reset()

Resets the parser to the original state.

updateVocabulary

protected void updateVocabulary(Node currentNode)

Updates the vocabulary context with possible @vocab declarations.

Parameters:

currentNode - the current node.

updateURIMapping

protected void updateURIMapping(Node node)

Updates the URI mapping with the XMLNS attributes declared in the current node.

Parameters:

node - input node.

getMapping

protected org.openrdf.model.URI getMapping(String prefix)

Returns a URI mapping for a given prefix.

Parameters:

prefix - input prefix.

Returns:

URI mapping.

resolveCurieOrURIList

protected org.openrdf.model.URI[] resolveCurieOrURIList(Node n,
                                                        String curieOrURIList,
                                                        boolean termAllowed)
                                                 throws URISyntaxException

Resolves a whitelist separated list of CURIE or URI.

Parameters:

n - current node.

curieOrURIList - list of CURIE/URI.

Returns:

Throws:

URISyntaxException

resolveURI

protected org.openrdf.model.URI resolveURI(String uriStr)

Resolves a URI string as URI.

Parameters:

uriStr -

Returns:

resolveCURIEOrURI

protected org.openrdf.model.Resource resolveCURIEOrURI(String curieOrURI,
                                                       boolean termAllowed)

Resolves a CURIE or URI string.

Parameters:

curieOrURI -

termAllowed - if true the resolution can be a term.

Returns:

the resolved resource.