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| Necessary classes to implement query builders. |
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| <h2>Query Parser Builders</h2> |
| <p> |
| The package <tt>org.apache.lucene.queryParser.builders</tt> contains the interface that |
| builders must implement, it also contain a utility {@link org.apache.lucene.queryparser.flexible.core.builders.QueryTreeBuilder}, which walks the tree |
| and call the Builder for each node in the tree. |
| Builder normally convert QueryNode Object into a Lucene Query Object, |
| and normally it's a one-to-one mapping class. |
| |
| But other builders implementations can by written to convert QueryNode objects to other non lucene objects. |
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