org.apache.lucene.queryParser.core.nodes
Class GroupQueryNode

java.lang.Object
  extended by org.apache.lucene.queryParser.core.nodes.QueryNodeImpl
      extended by org.apache.lucene.queryParser.core.nodes.GroupQueryNode
All Implemented Interfaces:
Serializable, 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.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.apache.lucene.queryParser.core.nodes.QueryNodeImpl
PLAINTEXT_FIELD_NAME, toQueryStringIgnoreFields
 
Constructor Summary
GroupQueryNode(QueryNode query)
          This QueryNode is used to identify parenthesis on the original query string
 
Method Summary
 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:
 
Methods inherited from class org.apache.lucene.queryParser.core.nodes.QueryNodeImpl
add, add, allocate, clone, containsTag, getChildren, getParent, getTag, getTags, isDefaultField, isLeaf, isRoot, 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:

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)
Parameters:
child -


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