pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/TermsQueryBuilder.java b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/TermsQueryBuilder.java
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+++ b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/TermsQueryBuilder.java
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+package org.apache.lucene.xmlparser.builders;
+
+import java.io.IOException;
+import java.io.StringReader;
+
+import org.apache.lucene.analysis.Analyzer;
+import org.apache.lucene.analysis.TokenStream;
+import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
+import org.apache.lucene.index.Term;
+import org.apache.lucene.search.BooleanClause;
+import org.apache.lucene.search.BooleanQuery;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.search.TermQuery;
+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.
+ */
+/**
+ * Builds a BooleanQuery from all of the terms found in the XML element using the choice of analyzer
+ */
+public class TermsQueryBuilder implements QueryBuilder {
+
+       Analyzer analyzer;
+
+               
+       public TermsQueryBuilder(Analyzer analyzer)
+       {
+               this.analyzer = analyzer;
+       }
+
+
+
+       public Query getQuery(Element e) throws ParserException {
+               
+        String fieldName=DOMUtils.getAttributeWithInheritanceOrFail(e,"fieldName");
+               String text=DOMUtils.getNonBlankTextOrFail(e);
+               
+               BooleanQuery bq=new BooleanQuery(DOMUtils.getAttribute(e,"disableCoord",false));
+               bq.setMinimumNumberShouldMatch(DOMUtils.getAttribute(e,"minimumNumberShouldMatch",0));
+               try
+               {
+           TokenStream ts = analyzer.reusableTokenStream(fieldName, new StringReader(text));
+      CharTermAttribute termAtt = ts.addAttribute(CharTermAttribute.class);
+                       Term term = null;
+      ts.reset();
+                       while (ts.incrementToken()) {
+                               if (term == null)
+                               {
+                                       term = new Term(fieldName, termAtt.toString());
+                               } else
+                               {
+//                                      create from previous to save fieldName.intern overhead
+                                       term = term.createTerm(termAtt.toString()); 
+                               }
+                               bq.add(new BooleanClause(new TermQuery(term),BooleanClause.Occur.SHOULD));
+                       }
+                       ts.end();
+                       ts.close();
+               } 
+               catch (IOException ioe)
+               {
+                       throw new RuntimeException("Error constructing terms from index:"
+                                       + ioe);
+               }
+               bq.setBoost(DOMUtils.getAttribute(e,"boost",1.0f));
+
+               return bq;
+               
+       }
+
+}