question: public < T extends Comparable < T > > Map < T , Double > recommendDocsUsingDocQuery ( List < T > recentItems , QueryTransform < T > docTransform , int numResults , Set < T > exclusions , T minDoc , boolean ignorePerfectMatches ) { Map < T , Double > scores = new HashMap < > ( ) ; for ( T recent : recentItems ) { ArrayList < SemVectorResult < T > > docResult = new ArrayList < > ( ) ; recommendDocsUsingDocQuery ( recent , docResult , docTransform , numResults * 10 , exclusions , minDoc ) ; for ( SemVectorResult < T > r : docResult ) { Double score = scores . get ( r . result ) ; if ( ignorePerfectMatches && r . score == 1.0 ) logger . info ( "Ignoring perfect match between " + recent + " and " + r . result + " overlap " + r . score ) ; else { if ( score != null ) score = score + r . score ; else score = r . score ; scores . put ( r . result , score ) ; } } } return RecommendationUtils . rescaleScoresToOne ( scores , numResults ) ; }
target:  Recommend a set of documents based on some recent viewed documents