Interface IFragmentsBuilder

IFragmentsBuilder is an interface for fragments (snippets) builder classes. A IFragmentsBuilder class can be plugged in to FastVectorHighlighter.

Namespace: Lucene.Net.Search.VectorHighlight

Assembly: Lucene.Net.Highlighter.dll

Syntax

public interface IFragmentsBuilder

Methods

CreateFragment(IndexReader, Int32, String, FieldFragList)

create a fragment.

Declaration

string CreateFragment(IndexReader reader, int docId, string fieldName, FieldFragList fieldFragList)

Parameters

Type	Name	Description
Lucene.Net.Index.IndexReader	reader	Lucene.Net.Index.IndexReader of the index
System.Int32	docId	document id to be highlighted
System.String	fieldName	field of the document to be highlighted
FieldFragList	fieldFragList	FieldFragList object

Returns

Type	Description
System.String	a created fragment or null when no fragment created

Exceptions

Type	Condition
System.IO.IOException	If there is a low-level I/O error

CreateFragment(IndexReader, Int32, String, FieldFragList, String[], String[], IEncoder)

create a fragment.

Declaration

string CreateFragment(IndexReader reader, int docId, string fieldName, FieldFragList fieldFragList, string[] preTags, string[] postTags, IEncoder encoder)

Parameters

Type	Name	Description
Lucene.Net.Index.IndexReader	reader	Lucene.Net.Index.IndexReader of the index
System.Int32	docId	document id to be highlighted
System.String	fieldName	field of the document to be highlighted
FieldFragList	fieldFragList	FieldFragList object
System.String[]	preTags	pre-tags to be used to highlight terms
System.String[]	postTags	post-tags to be used to highlight terms
IEncoder	encoder	an encoder that generates encoded text

Returns

Type	Description
System.String	a created fragment or null when no fragment created

Exceptions

Type	Condition
System.IO.IOException	If there is a low-level I/O error

CreateFragments(IndexReader, Int32, String, FieldFragList, Int32)

create multiple fragments.

Declaration

string[] CreateFragments(IndexReader reader, int docId, string fieldName, FieldFragList fieldFragList, int maxNumFragments)

Parameters

Type	Name	Description
Lucene.Net.Index.IndexReader	reader	Lucene.Net.Index.IndexReader of the index
System.Int32	docId	document id to be highlighter
System.String	fieldName	field of the document to be highlighted
FieldFragList	fieldFragList	FieldFragList object
System.Int32	maxNumFragments	maximum number of fragments

Returns

Type	Description
System.String[]	created fragments or null when no fragments created. size of the array can be less than maxNumFragments

Exceptions

Type	Condition
System.IO.IOException	If there is a low-level I/O error

CreateFragments(IndexReader, Int32, String, FieldFragList, Int32, String[], String[], IEncoder)

create multiple fragments.

Declaration

string[] CreateFragments(IndexReader reader, int docId, string fieldName, FieldFragList fieldFragList, int maxNumFragments, string[] preTags, string[] postTags, IEncoder encoder)

Parameters

Type	Name	Description
Lucene.Net.Index.IndexReader	reader	Lucene.Net.Index.IndexReader of the index
System.Int32	docId	document id to be highlighter
System.String	fieldName	field of the document to be highlighted
FieldFragList	fieldFragList	FieldFragList object
System.Int32	maxNumFragments	maximum number of fragments
System.String[]	preTags	pre-tags to be used to highlight terms
System.String[]	postTags	post-tags to be used to highlight terms
IEncoder	encoder	an encoder that generates encoded text

Returns

Type	Description
System.String[]	created fragments or null when no fragments created. size of the array can be less than maxNumFragments

Exceptions

Type	Condition
System.IO.IOException	If there is a low-level I/O error