This processor is used to apply the correct
ModifierQueryNode to
BooleanQueryNodes children. This is a variant of
Precedence.Processors.BooleanModifiersQueryNodeProcessor which ignores precedence.
The Parser.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 BooleanQueryNodes. If an AndQueryNode is found, every child, which is not a ModifierQueryNode or the ModifierQueryNode is Modifier.MOD_NONE, becomes a Modifier.MOD_REQ. For default BooleanQueryNode, it checks the default operator is 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).