Package cz.vutbr.fit.layout.map

Class MetadataExampleGenerator

java.lang.Object

cz.vutbr.fit.layout.map.MetadataExampleGenerator

public class MetadataExampleGenerator
extends Object

Implements extracting ocurrence examples from metadata.

Author:

burgetr

Constructor Summary

Constructors

Constructor	Description
MetadataExampleGenerator(RDFArtifactRepository repo, org.eclipse.rdf4j.model.IRI metadataContextIri)	Creates an example generator for a metadata context in a repository with a identity (useExact) key filter function.
MetadataExampleGenerator(RDFArtifactRepository repo, org.eclipse.rdf4j.model.IRI metadataContextIri, Function<String,String> stringFilter)	Creates an example generator for a metadata context in a repository with a configurable key filter function.

Method Summary

Modifier and Type	Method	Description
String	filterKey(String src)	Applies the configured keyFilter function to a source string.
List<Example>	getExamples()	Finds all literals in the given metadata context and creates a list of occurrence examples containing the text, the corresponding property and subject.
Map<Float,List<Example>>	getFloatExamples()	Creates the mapping from floats to examples for the examples that may be converted to float.
Float	getFloatValue(String src)	Converts a string to a float value if possible.
Map<String,List<Example>>	getStringExamples()	Creates the mapping from filtered strings to examples taken from the repository.
static String	normalizeText(String src)	A filter function that normalizes the text which includes Conversion to lower case Reduction of sequences of white space characters to a single space Replacing HTML entities by their values
static String	useExact(String s)	A filter function that uses the string exactly as it is.

Methods inherited from class java.lang.Object

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

Constructor Detail

MetadataExampleGenerator

public MetadataExampleGenerator(RDFArtifactRepository repo,
                                org.eclipse.rdf4j.model.IRI metadataContextIri)

Creates an example generator for a metadata context in a repository with a identity (useExact) key filter function.

Parameters:

repo -

metadataContextIri -

MetadataExampleGenerator

public MetadataExampleGenerator(RDFArtifactRepository repo,
                                org.eclipse.rdf4j.model.IRI metadataContextIri,
                                Function<String,String> stringFilter)

Creates an example generator for a metadata context in a repository with a configurable key filter function.

Parameters:

repo -

metadataContextIri -

stringFilter - the filter function to be applied to the strings in order to make them a map key.

Method Detail

getExamples

public List<Example> getExamples()

Finds all literals in the given metadata context and creates a list of occurrence examples containing the text, the corresponding property and subject.

Returns:

A list of ocurrence examples.

getStringExamples

public Map<String,List<Example>> getStringExamples()

Creates the mapping from filtered strings to examples taken from the repository.

Returns:

A map that maps filtered strings to the individual examples. Generally a list of examples may be mapped to a single string.

getFloatExamples

public Map<Float,List<Example>> getFloatExamples()

Creates the mapping from floats to examples for the examples that may be converted to float.

Returns:

A map that maps float values to the individual examples. Generally a list of examples may be mapped to a single string.

filterKey

public String filterKey(String src)

Applies the configured keyFilter function to a source string.

Parameters:

src -

Returns:

getFloatValue

public Float getFloatValue(String src)

Converts a string to a float value if possible.

Parameters:

src -

Returns:

useExact

public static String useExact(String s)

A filter function that uses the string exactly as it is.

Parameters:

s - the source string

Returns:

s

normalizeText

public static String normalizeText(String src)

A filter function that normalizes the text which includes

• Conversion to lower case
• Reduction of sequences of white space characters to a single space
• Replacing HTML entities by their values

Parameters:

src - the source string

Returns:

the normalized string