[LUCENE-2603] FastVectorHighlighter: add a method to set an arbitrary char that is used when concatenating multiValued data

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.9.3, 3.0.2
• Fix Version/s: 3.1, 4.0-ALPHA
• Component/s: modules/highlighter
• Lucene Fields: New
• Assignee: Koji Sekiguchi
• Reporter: Koji Sekiguchi
• Created: 16/Aug/10 09:36
• Updated: 30/Mar/11 15:50
• Resolved: 17/Aug/10 02:46

Description

If the following multiValued names are in authors field:

• Michael McCandless
• Erik Hatcher
• Otis Gospodnetić

Since FragmentsBuilder concatenates multiValued data with a space in BaseFragmentsBuilder.getFragmentSource():

while( buffer.length() < endOffset && index[0] < values.length ){
  if( index[0] > 0 && values[index[0]].isTokenized() && values[index[0]].stringValue().length() > 0 )
    buffer.append( ' ' );
  buffer.append( values[index[0]++].stringValue() );
}

an entire field snippet (using LUCENE-2464) will be "Michael McCandless Erik Hatcher Otis Gospodnetić". There is a requirement an arbitrary char (e.g. '/') can be set so that client can separate the snippet easily. i.e. "Michael McCandless/Erik Hatcher/Otis Gospodnetić"