pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / queryparser / src / java / org / apache / lucene / queryParser / standard / builders / PrefixWildcardQueryNodeBuilder.java

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/PrefixWildcardQueryNodeBuilder.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/PrefixWildcardQueryNodeBuilder.java
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/PrefixWildcardQueryNodeBuilder.java
@@ -0,0 +1,53 @@
+package org.apache.lucene.queryParser.standard.builders;
+
+/**
+ * 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.
+ */
+
+import org.apache.lucene.index.Term;
+import org.apache.lucene.queryParser.core.QueryNodeException;
+import org.apache.lucene.queryParser.core.nodes.QueryNode;
+import org.apache.lucene.queryParser.standard.nodes.PrefixWildcardQueryNode;
+import org.apache.lucene.queryParser.standard.processors.MultiTermRewriteMethodProcessor;
+import org.apache.lucene.search.MultiTermQuery;
+import org.apache.lucene.search.PrefixQuery;
+
+/**
+ * Builds a {@link PrefixQuery} object from a {@link PrefixWildcardQueryNode}
+ * object.
+ */
+public class PrefixWildcardQueryNodeBuilder implements StandardQueryBuilder {
+
+  public PrefixWildcardQueryNodeBuilder() {
+    // empty constructor
+  }
+
+  public PrefixQuery build(QueryNode queryNode) throws QueryNodeException {    
+
+    PrefixWildcardQueryNode wildcardNode = (PrefixWildcardQueryNode) queryNode;
+
+    String text = wildcardNode.getText().subSequence(0, wildcardNode.getText().length() - 1).toString();
+    PrefixQuery q = new PrefixQuery(new Term(wildcardNode.getFieldAsString(), text));
+    
+    MultiTermQuery.RewriteMethod method = (MultiTermQuery.RewriteMethod)queryNode.getTag(MultiTermRewriteMethodProcessor.TAG_ID);
+    if (method != null) {
+      q.setRewriteMethod(method);
+    }
+    
+    return q;
+  }
+
+}