org.apache.lucene.search.vectorhighlight
Class BaseFragmentsBuilder

java.lang.Object
  org.apache.lucene.search.vectorhighlight.BaseFragmentsBuilder

All Implemented Interfaces:

FragmentsBuilder

Direct Known Subclasses:

ScoreOrderFragmentsBuilder, SimpleFragmentsBuilder

public abstract class BaseFragmentsBuilder
extends Object
implements FragmentsBuilder

Field Summary

static String[]	COLORED_POST_TAGS
static String[]	COLORED_PRE_TAGS
protected String[]	postTags
protected String[]	preTags

Constructor Summary

protected	BaseFragmentsBuilder()
protected	BaseFragmentsBuilder(String[] preTags, String[] postTags)

Method Summary

String	createFragment(IndexReader reader, int docId, String fieldName, FieldFragList fieldFragList) create a fragment.
String[]	createFragments(IndexReader reader, int docId, String fieldName, FieldFragList fieldFragList, int maxNumFragments) create multiple fragments.
protected String[]	getFieldValues(IndexReader reader, int docId, String fieldName)
protected String	getFragmentSource(StringBuilder buffer, int[] index, String[] values, int startOffset, int endOffset)
protected String	getPostTag(int num)
protected String	getPreTag(int num)
abstract List<FieldFragList.WeightedFragInfo>	getWeightedFragInfoList(List<FieldFragList.WeightedFragInfo> src)
protected String	makeFragment(StringBuilder buffer, int[] index, String[] values, FieldFragList.WeightedFragInfo fragInfo)

Methods inherited from class java.lang.Object

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

Field Detail

preTags

protected String[] preTags

postTags

protected String[] postTags

COLORED_PRE_TAGS

public static final String[] COLORED_PRE_TAGS

COLORED_POST_TAGS

public static final String[] COLORED_POST_TAGS

Constructor Detail

BaseFragmentsBuilder

protected BaseFragmentsBuilder()

BaseFragmentsBuilder

protected BaseFragmentsBuilder(String[] preTags,
                               String[] postTags)

Method Detail

getWeightedFragInfoList

public abstract List<FieldFragList.WeightedFragInfo> getWeightedFragInfoList(List<FieldFragList.WeightedFragInfo> src)

createFragment

public String createFragment(IndexReader reader,
                             int docId,
                             String fieldName,
                             FieldFragList fieldFragList)
                      throws IOException

Description copied from interface: FragmentsBuilder

create a fragment.

Specified by:

createFragment in interface FragmentsBuilder

Parameters:

reader - IndexReader of the index

docId - document id to be highlighted

fieldName - field of the document to be highlighted

fieldFragList - FieldFragList object

Returns:

a created fragment or null when no fragment created

Throws:

IOException

createFragments

public String[] createFragments(IndexReader reader,
                                int docId,
                                String fieldName,
                                FieldFragList fieldFragList,
                                int maxNumFragments)
                         throws IOException

Description copied from interface: FragmentsBuilder

create multiple fragments.

Specified by:

createFragments in interface FragmentsBuilder

Parameters:

reader - IndexReader of the index

docId - document id to be highlighter

fieldName - field of the document to be highlighted

fieldFragList - FieldFragList object

maxNumFragments - maximum number of fragments

Returns:

created fragments or null when no fragments created. size of the array can be less than maxNumFragments

Throws:

IOException

getFieldValues

protected String[] getFieldValues(IndexReader reader,
                                  int docId,
                                  String fieldName)
                           throws IOException

Throws:

IOException

makeFragment

protected String makeFragment(StringBuilder buffer,
                              int[] index,
                              String[] values,
                              FieldFragList.WeightedFragInfo fragInfo)

getFragmentSource

protected String getFragmentSource(StringBuilder buffer,
                                   int[] index,
                                   String[] values,
                                   int startOffset,
                                   int endOffset)

getPreTag

protected String getPreTag(int num)

getPostTag

protected String getPostTag(int num)