Package org.apache.lucene.search.uhighlight

Class FieldHighlighter

java.lang.Object

org.apache.lucene.search.uhighlight.FieldHighlighter

public class FieldHighlighter
extends Object

Internal highlighter abstraction that operates on a per field basis.

Field Summary

Fields

Modifier and Type	Field	Description
protected BreakIterator	breakIterator
protected String	field
protected FieldOffsetStrategy	fieldOffsetStrategy
protected int	maxNoHighlightPassages
protected int	maxPassages
protected PassageFormatter	passageFormatter
protected PassageScorer	passageScorer

Constructor Summary

Constructors

Constructor	Description
FieldHighlighter(String field, FieldOffsetStrategy fieldOffsetStrategy, BreakIterator breakIterator, PassageScorer passageScorer, int maxPassages, int maxNoHighlightPassages, PassageFormatter passageFormatter)

Method Summary

Modifier and Type	Method	Description
String	getField()
UnifiedHighlighter.OffsetSource	getOffsetSource()
protected Passage[]	getSummaryPassagesNoHighlight(int maxPassages)	Called to summarize a document when no highlights were found.
Object	highlightFieldForDoc(LeafReader reader, int docId, String content)	The primary method -- highlight this doc, assuming a specific field and given this content.
protected Passage[]	highlightOffsetsEnums(OffsetsEnum off)

Methods inherited from class java.lang.Object

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

Field Detail

field

protected final String field

fieldOffsetStrategy

protected final FieldOffsetStrategy fieldOffsetStrategy

breakIterator

protected final BreakIterator breakIterator

passageScorer

protected final PassageScorer passageScorer

maxPassages

protected final int maxPassages

maxNoHighlightPassages

protected final int maxNoHighlightPassages

passageFormatter

protected final PassageFormatter passageFormatter

Constructor Detail

FieldHighlighter

public FieldHighlighter(String field,
                        FieldOffsetStrategy fieldOffsetStrategy,
                        BreakIterator breakIterator,
                        PassageScorer passageScorer,
                        int maxPassages,
                        int maxNoHighlightPassages,
                        PassageFormatter passageFormatter)

Method Detail

getField

public String getField()

getOffsetSource

public UnifiedHighlighter.OffsetSource getOffsetSource()

highlightFieldForDoc

public Object highlightFieldForDoc(LeafReader reader,
                                   int docId,
                                   String content)
                            throws IOException

The primary method -- highlight this doc, assuming a specific field and given this content.

Throws:

IOException

getSummaryPassagesNoHighlight

protected Passage[] getSummaryPassagesNoHighlight(int maxPassages)

Called to summarize a document when no highlights were found. By default this just returns the first maxPassages sentences; subclasses can override to customize. The state of breakIterator should be at the beginning.

highlightOffsetsEnums

protected Passage[] highlightOffsetsEnums(OffsetsEnum off)
                                   throws IOException

Throws:

IOException