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

Class GroupQueryNode

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

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:

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 Details

GroupQueryNode

public GroupQueryNode(QueryNode query)

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

Method Details

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)