Package org.apache.lucene.queryparser.flexible.core.nodes

Class BoostQueryNode

  • All Implemented Interfaces:
    java.lang.Cloneable, QueryNode
    public class BoostQueryNode
extends QueryNodeImpl
    A BoostQueryNode boosts the QueryNode tree which is under this node. So, it must only and always have one child. The boost value may vary from 0.0 to 1.0.

    • Constructor Detail

      • BoostQueryNode

        public BoostQueryNode​(QueryNode query,
                      float value)
        Constructs a boost node
        Parameters:
        query - the query to be boosted
        value - the boost value, it may vary from 0.0 to 1.0

    • Method Detail

      • getChild

        public QueryNode getChild()
        Returns the single child which this node boosts.
        Returns:
        the single child which this node boosts

      • getValue

        public float getValue()
        Returns the boost value. It may vary from 0.0 to 1.0.
        Returns:
        the boost value

      • toString

        public java.lang.String toString()
        Description copied from class: QueryNodeImpl
        Every implementation of this class should return pseudo xml like this: For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>
        Specified by:
        toString in interface QueryNode
        Overrides:
        toString in class QueryNodeImpl
        See Also:
        QueryNode.toString()

      • toQueryString

        public java.lang.CharSequence toQueryString​(EscapeQuerySyntax escapeSyntaxParser)
        Description copied from interface: QueryNode
        convert to a query string understood by the query parser

      • cloneTree

        public QueryNode cloneTree()
                    throws java.lang.CloneNotSupportedException
        Description copied from interface: QueryNode
        Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method
        Specified by:
        cloneTree in interface QueryNode
        Overrides:
        cloneTree in class QueryNodeImpl
        Returns:
        the cloned tree
        Throws:
        java.lang.CloneNotSupportedException