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Necessary classes to implement query builders.
Query Parser Builders

The package org.apache.lucene.queryParser.builders contains the interface that builders must implement, it also contain a utility 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. /**
 * Necessary classes to implement query builders.
 *
 * <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.
 */
package org.apache.lucene.queryparser.flexible.core.builders;