1 package org.apache.lucene.queryParser.spans;
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20 import org.apache.lucene.queryParser.core.QueryNodeException;
21 import org.apache.lucene.queryParser.core.builders.QueryTreeBuilder;
22 import org.apache.lucene.queryParser.core.nodes.BooleanQueryNode;
23 import org.apache.lucene.queryParser.core.nodes.FieldQueryNode;
24 import org.apache.lucene.queryParser.core.nodes.QueryNode;
25 import org.apache.lucene.queryParser.standard.builders.StandardQueryBuilder;
26 import org.apache.lucene.search.spans.SpanQuery;
29 * Sets up a query tree builder to build a span query tree from a query node
33 * The defined map is:<br/>
34 * - every BooleanQueryNode instance is delegated to the SpanOrQueryNodeBuilder<br/>
35 * - every FieldQueryNode instance is delegated to the SpanTermQueryNodeBuilder <br/>
38 public class SpansQueryTreeBuilder extends QueryTreeBuilder implements
39 StandardQueryBuilder {
41 public SpansQueryTreeBuilder() {
42 setBuilder(BooleanQueryNode.class, new SpanOrQueryNodeBuilder());
43 setBuilder(FieldQueryNode.class, new SpanTermQueryNodeBuilder());
48 public SpanQuery build(QueryNode queryTree) throws QueryNodeException {
49 return (SpanQuery) super.build(queryTree);