GroupQueryNode (Lucene 8.6.0 API)

java.lang.Object
- org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl
- - org.apache.lucene.queryparser.flexible.core.nodes.GroupQueryNode

All Implemented Interfaces:

Cloneable, QueryNode
```
public class GroupQueryNode
extends QueryNodeImpl
```
A GroupQueryNode represents a location where the original user typed real parenthesis on the query string. This class is useful for queries like: a) a AND b OR c b) ( a AND b) OR c Parenthesis might be used to define the boolean operation precedence.

Field Summary
- Fields inherited from class org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl
  PLAINTEXT_FIELD_NAME, toQueryStringIgnoreFields

Constructor Summary

Constructors
Constructor Description

GroupQueryNode(QueryNode query)
This QueryNode is used to identify parenthesis on the original query string

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`QueryNode`	`cloneTree()`	Recursive clone the QueryNode tree The tags are not copied to the new tree when you call the cloneTree() method
`QueryNode`	`getChild()`
`void`	`setChild(QueryNode child)`
`CharSequence`	`toQueryString(EscapeQuerySyntax escapeSyntaxParser)`	convert to a query string understood by the query parser
`String`	`toString()`	Every implementation of this class should return pseudo xml like this: For FieldQueryNode: <field start='1' end='2' field='subject' text='foo'/>

Methods inherited from class org.apache.lucene.queryparser.flexible.core.nodes.QueryNodeImpl
add, add, allocate, clone, containsTag, getChildren, getParent, getTag, getTagMap, isDefaultField, isLeaf, isRoot, removeChildren, removeFromParent, set, setLeaf, setTag, unsetTag

Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - GroupQueryNode
```
public GroupQueryNode(QueryNode query)
```
    This QueryNode is used to identify parenthesis on the original query string
- Method Detail
  - getChild
```
public QueryNode getChild()
```
  - toString
```
public 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 CharSequence toQueryString(EscapeQuerySyntax escapeSyntaxParser)
```
    Description copied from interface: QueryNode
    
    convert to a query string understood by the query parser
  - cloneTree
```
public QueryNode cloneTree()
                    throws 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:
    
    CloneNotSupportedException
  - setChild
```
public void setChild(QueryNode child)
```