public class BooleanQuery2ModifierNodeProcessor extends Object implements QueryNodeProcessor
This processor is used to apply the correct ModifierQueryNode
to
BooleanQueryNode
s children. This is a variant of
BooleanModifiersQueryNodeProcessor
which ignores precedence.
The StandardSyntaxParser
knows the rules of precedence, but lucene
does not. e.g. (A AND B OR C AND D)
ist treated like
(+A +B +C +D)
.
This processor walks through the query node tree looking for
BooleanQueryNode
s. If an AndQueryNode
is found, every child,
which is not a ModifierQueryNode
or the ModifierQueryNode
is
ModifierQueryNode.Modifier.MOD_NONE
, becomes a ModifierQueryNode.Modifier.MOD_REQ
. For default
BooleanQueryNode
, it checks the default operator is
StandardQueryConfigHandler.Operator.AND
, if it is, the same operation when an
AndQueryNode
is found is applied to it. Each BooleanQueryNode
which direct parent is also a BooleanQueryNode
is removed (to ignore
the rules of precedence).
Constructor and Description |
---|
BooleanQuery2ModifierNodeProcessor() |
Modifier and Type | Method and Description |
---|---|
QueryConfigHandler |
getQueryConfigHandler()
Returns the
QueryConfigHandler associated to the query tree if any,
otherwise it returns null |
QueryNode |
process(QueryNode queryTree)
Processes a query node tree.
|
void |
setQueryConfigHandler(QueryConfigHandler queryConfigHandler)
Sets the
QueryConfigHandler associated to the query tree. |
public QueryNode process(QueryNode queryTree) throws QueryNodeException
QueryNodeProcessor
null
.process
in interface QueryNodeProcessor
queryTree
- tree root nodeQueryNodeException
public void setQueryConfigHandler(QueryConfigHandler queryConfigHandler)
QueryNodeProcessor
QueryConfigHandler
associated to the query tree.setQueryConfigHandler
in interface QueryNodeProcessor
public QueryConfigHandler getQueryConfigHandler()
QueryNodeProcessor
QueryConfigHandler
associated to the query tree if any,
otherwise it returns null
getQueryConfigHandler
in interface QueryNodeProcessor
QueryConfigHandler
associated to the query tree if any,
otherwise it returns null
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