pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / xml-query-parser / src / java / org / apache / lucene / xmlparser / builders / BoostingQueryBuilder.java

diff --git a/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BoostingQueryBuilder.java b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BoostingQueryBuilder.java
new file mode 100644 (file)
index 0000000..d19ba79
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+++ b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BoostingQueryBuilder.java
@@ -0,0 +1,60 @@
+package org.apache.lucene.xmlparser.builders;
+
+import org.apache.lucene.search.BoostingQuery;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.xmlparser.DOMUtils;
+import org.apache.lucene.xmlparser.ParserException;
+import org.apache.lucene.xmlparser.QueryBuilder;
+import org.w3c.dom.Element;
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * 
+ */
+public class BoostingQueryBuilder implements QueryBuilder
+{
+       
+       private QueryBuilder factory;
+       float defaultBoost=0.01f;
+
+       public BoostingQueryBuilder (QueryBuilder factory)
+       {
+               this.factory=factory;
+       }
+
+       public Query getQuery(Element e) throws ParserException
+       {
+               
+        Element mainQueryElem=DOMUtils.getChildByTagOrFail(e,"Query");
+               mainQueryElem=DOMUtils.getFirstChildOrFail(mainQueryElem);
+               Query mainQuery=factory.getQuery(mainQueryElem);
+
+               Element boostQueryElem=DOMUtils.getChildByTagOrFail(e,"BoostQuery");
+               float boost=DOMUtils.getAttribute(boostQueryElem,"boost",defaultBoost);
+               boostQueryElem=DOMUtils.getFirstChildOrFail(boostQueryElem);
+               Query boostQuery=factory.getQuery(boostQueryElem);
+               
+               BoostingQuery bq = new BoostingQuery(mainQuery,boostQuery,boost);
+
+               bq.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
+               return bq;
+
+       }
+
+
+}