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| <h1 id="Lucene_Net_QueryParsers_Flexible_Core_Builders" data-uid="Lucene.Net.QueryParsers.Flexible.Core.Builders" class="text-break">Namespace Lucene.Net.QueryParsers.Flexible.Core.Builders |
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| <p>Necessary classes to implement query builders.</p> |
| <h2 id="query-parser-builders">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 <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.QueryTreeBuilder.html">QueryTreeBuilder</a>, 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. </p> |
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| <div class="markdown level0 conceptual"></div> |
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| <h3 id="classes">Classes |
| </h3> |
| <h4><a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.QueryTreeBuilder.html">QueryTreeBuilder</a></h4> |
| <section><p>LUCENENET specific class for accessing static members of <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.QueryTreeBuilder-1.html">QueryTreeBuilder<TQuery></a> |
| without referencing its generic closing type.</p> |
| </section> |
| <h4><a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.QueryTreeBuilder-1.html">QueryTreeBuilder<TQuery></a></h4> |
| <section><p>This class should be used when there is a builder for each type of node.</p> |
| <p><p> |
| The type of node may be defined in 2 different ways: - by the field name, |
| when the node implements the <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Nodes.IFieldableNode.html">IFieldableNode</a> interface - by its class, |
| it keeps checking the class and all the interfaces and classes this class |
| implements/extends until it finds a builder for that class/interface |
| </p> |
| <p> |
| This class always check if there is a builder for the field name before it |
| checks for the node class. So, field name builders have precedence over class |
| builders. |
| </p> |
| <p> |
| When a builder is found for a node, it's called and the node is passed to the |
| builder. If the returned built object is not <code>null</code>, it's tagged |
| on the node using the tag <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.QueryTreeBuilder.html#Lucene_Net_QueryParsers_Flexible_Core_Builders_QueryTreeBuilder_QUERY_TREE_BUILDER_TAGID">QUERY_TREE_BUILDER_TAGID</a>. |
| </p> |
| <p> |
| The children are usually built before the parent node. However, if a builder |
| associated to a node is an instance of <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.QueryTreeBuilder-1.html">QueryTreeBuilder<TQuery></a>, the node is |
| delegated to this builder and it's responsible to build the node and its |
| children. |
| </p> |
| <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.IQueryBuilder-1.html">IQueryBuilder<TQuery></a></p> |
| </section> |
| <h3 id="interfaces">Interfaces |
| </h3> |
| <h4><a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.IQueryBuilder-1.html">IQueryBuilder<TQuery></a></h4> |
| <section><p>This interface is used by implementors classes that builds some kind of |
| object from a query tree.</p> |
| <a class="xref" href="Lucene.Net.QueryParsers.Flexible.Core.Builders.QueryTreeBuilder.html">QueryTreeBuilder</a> |
| </section> |
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