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

# Class QueryNodeOperation

java.lang.Object
org.apache.lucene.queryparser.flexible.core.util.QueryNodeOperation

public final class QueryNodeOperation extends Object
Allow joining 2 QueryNode Trees, into one.

## Method Summary

Modifier and Type
Method
Description
`static final QueryNode`
`logicalAnd(QueryNode q1, QueryNode q2)`
perform a logical and of 2 QueryNode trees.

### Methods inherited from class java.lang.Object

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

## Method Details

### logicalAnd

public static final QueryNode logicalAnd(QueryNode q1, QueryNode q2)
perform a logical and of 2 QueryNode trees. if q1 and q2 are ANDQueryNode nodes it uses head Node from q1 and adds the children of q2 to q1 if q1 is a AND node and q2 is not, add q2 as a child of the head node of q1 if q2 is a AND node and q1 is not, add q1 as a child of the head node of q2 if q1 and q2 are not ANDQueryNode nodes, create a AND node and make q1 and q2 children of that node if q1 or q2 is null it returns the not null node if q1 = q2 = null it returns null