Class MoreLikeThisQuery


  • public class MoreLikeThisQuery
    extends Query
    A simple wrapper for MoreLikeThis for use in scenarios where a Query object is required eg in custom QueryParser extensions. At query.rewrite() time the reader is used to construct the actual MoreLikeThis object and obtain the real Query object.
    • Field Detail

      • likeText

        private java.lang.String likeText
      • moreLikeFields

        private java.lang.String[] moreLikeFields
      • fieldName

        private final java.lang.String fieldName
      • percentTermsToMatch

        private float percentTermsToMatch
      • minTermFrequency

        private int minTermFrequency
      • maxQueryTerms

        private int maxQueryTerms
      • stopWords

        private java.util.Set<?> stopWords
      • minDocFreq

        private int minDocFreq
    • Constructor Detail

      • MoreLikeThisQuery

        public MoreLikeThisQuery​(java.lang.String likeText,
                                 java.lang.String[] moreLikeFields,
                                 Analyzer analyzer,
                                 java.lang.String fieldName)
        Parameters:
        moreLikeFields - fields used for similarity measure
    • Method Detail

      • rewrite

        public Query rewrite​(IndexReader reader)
                      throws java.io.IOException
        Description copied from class: Query
        Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.
        Overrides:
        rewrite in class Query
        Throws:
        java.io.IOException
      • toString

        public java.lang.String toString​(java.lang.String field)
        Description copied from class: Query
        Prints a query to a string, with field assumed to be the default field and omitted.
        Specified by:
        toString in class Query
      • getPercentTermsToMatch

        public float getPercentTermsToMatch()
      • setPercentTermsToMatch

        public void setPercentTermsToMatch​(float percentTermsToMatch)
      • getAnalyzer

        public Analyzer getAnalyzer()
      • setAnalyzer

        public void setAnalyzer​(Analyzer analyzer)
      • getLikeText

        public java.lang.String getLikeText()
      • setLikeText

        public void setLikeText​(java.lang.String likeText)
      • getMaxQueryTerms

        public int getMaxQueryTerms()
      • setMaxQueryTerms

        public void setMaxQueryTerms​(int maxQueryTerms)
      • getMinTermFrequency

        public int getMinTermFrequency()
      • setMinTermFrequency

        public void setMinTermFrequency​(int minTermFrequency)
      • getMoreLikeFields

        public java.lang.String[] getMoreLikeFields()
      • setMoreLikeFields

        public void setMoreLikeFields​(java.lang.String[] moreLikeFields)
      • getStopWords

        public java.util.Set<?> getStopWords()
      • setStopWords

        public void setStopWords​(java.util.Set<?> stopWords)
      • getMinDocFreq

        public int getMinDocFreq()
      • setMinDocFreq

        public void setMinDocFreq​(int minDocFreq)
      • hashCode

        public int hashCode()
        Description copied from class: Query
        Override and implement query hash code properly in a subclass. This is required so that QueryCache works properly.
        Specified by:
        hashCode in class Query
        See Also:
        Query.equals(Object)
      • equals

        public boolean equals​(java.lang.Object other)
        Description copied from class: Query
        Override and implement query instance equivalence properly in a subclass. This is required so that QueryCache works properly. Typically a query will be equal to another only if it's an instance of the same class and its document-filtering properties are identical that other instance. Utility methods are provided for certain repetitive code.
        Specified by:
        equals in class Query
        See Also:
        Query.sameClassAs(Object), Query.classHash()
      • visit

        public void visit​(QueryVisitor visitor)
        Description copied from class: Query
        Recurse through the query tree, visiting any child queries
        Overrides:
        visit in class Query
        Parameters:
        visitor - a QueryVisitor to be called by each query in the tree