pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/TermsFilterBuilder.java b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/TermsFilterBuilder.java
new file mode 100644 (file)
index 0000000..460232d
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+++ b/lucene-java-3.5.0/lucene/contrib/xml-query-parser/src/java/org/apache/lucene/xmlparser/builders/TermsFilterBuilder.java
@@ -0,0 +1,87 @@
+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.Filter;
+import org.apache.lucene.search.TermsFilter;
+import org.apache.lucene.xmlparser.DOMUtils;
+import org.apache.lucene.xmlparser.FilterBuilder;
+import org.apache.lucene.xmlparser.ParserException;
+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 TermsFilterBuilder implements FilterBuilder
+{
+       Analyzer analyzer;
+       
+       /**
+        * @param analyzer
+        */
+       public TermsFilterBuilder(Analyzer analyzer)
+       {
+               this.analyzer = analyzer;
+       }
+       
+       /*
+        * (non-Javadoc)
+        * 
+        * @see org.apache.lucene.xmlparser.FilterBuilder#process(org.w3c.dom.Element)
+        */
+       public Filter getFilter(Element e) throws ParserException
+       {
+               TermsFilter tf = new TermsFilter();
+               String text = DOMUtils.getNonBlankTextOrFail(e);
+               String fieldName = DOMUtils.getAttributeWithInheritanceOrFail(e, "fieldName");
+    
+               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()); 
+                               }
+                               tf.addTerm(term);
+                       }
+           ts.end();
+           ts.close();
+               } 
+               catch (IOException ioe)
+               {
+                       throw new RuntimeException("Error constructing terms from index:"
+                                       + ioe);
+               }
+               return tf;
+       }
+}