pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BooleanQueryBuilder.java b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BooleanQueryBuilder.java
new file mode 100644 (file)
index 0000000..fc020fc
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+++ b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/BooleanQueryBuilder.java
@@ -0,0 +1,102 @@
+/*
+ * Created on 25-Jan-2006
+ */
+package org.apache.lucene.xmlparser.builders;
+
+import org.apache.lucene.search.BooleanClause;
+import org.apache.lucene.search.BooleanQuery;
+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;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+/**
+ * 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 BooleanQueryBuilder implements QueryBuilder {
+       
+       private QueryBuilder factory;
+
+       public BooleanQueryBuilder(QueryBuilder factory)
+       {
+               this.factory=factory;
+       }
+
+       /* (non-Javadoc)
+        * @see org.apache.lucene.xmlparser.QueryObjectBuilder#process(org.w3c.dom.Element)
+        */
+       public Query getQuery(Element e) throws ParserException {
+               BooleanQuery bq=new BooleanQuery(DOMUtils.getAttribute(e,"disableCoord",false));
+               bq.setMinimumNumberShouldMatch(DOMUtils.getAttribute(e,"minimumNumberShouldMatch",0));
+               bq.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
+               
+               NodeList nl = e.getChildNodes();
+               for(int i=0;i<nl.getLength();i++)
+               {
+                       Node node = nl.item(i);
+                       if(node.getNodeName().equals("Clause"))
+                       {
+                               Element clauseElem=(Element) node;
+                               BooleanClause.Occur occurs=getOccursValue(clauseElem);
+                               
+                               Element clauseQuery=DOMUtils.getFirstChildOrFail(clauseElem);
+                               Query q=factory.getQuery(clauseQuery);
+                               bq.add(new BooleanClause(q,occurs));
+                       }
+               }
+               
+               return bq;
+       }
+       static BooleanClause.Occur getOccursValue(Element clauseElem) throws ParserException
+       {
+               String occs=clauseElem.getAttribute("occurs");
+               BooleanClause.Occur occurs=BooleanClause.Occur.SHOULD;
+               if("must".equalsIgnoreCase(occs))
+               {
+                       occurs=BooleanClause.Occur.MUST;
+               }
+               else
+               {
+                       if("mustNot".equalsIgnoreCase(occs))
+                       {
+                               occurs=BooleanClause.Occur.MUST_NOT;
+                       }                       
+                       else
+                       {
+                               if(("should".equalsIgnoreCase(occs))||("".equals(occs)))
+                               {
+                                       occurs=BooleanClause.Occur.SHOULD;
+                               }                       
+                               else                            
+                               {
+                                       if(occs!=null)
+                                       {
+                                               throw new ParserException("Invalid value for \"occurs\" attribute of clause:"+occs);
+                                       }
+                               }
+                       }
+               }
+               return occurs;
+               
+       }
+
+}