pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/MatchNoDocsQueryNodeBuilder.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/MatchNoDocsQueryNodeBuilder.java
new file mode 100644 (file)
index 0000000..fb2c95c
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/MatchNoDocsQueryNodeBuilder.java
@@ -0,0 +1,52 @@
+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.messages.MessageImpl;
+import org.apache.lucene.queryParser.core.QueryNodeException;
+import org.apache.lucene.queryParser.core.messages.QueryParserMessages;
+import org.apache.lucene.queryParser.core.nodes.MatchNoDocsQueryNode;
+import org.apache.lucene.queryParser.core.nodes.QueryNode;
+import org.apache.lucene.queryParser.standard.parser.EscapeQuerySyntaxImpl;
+import org.apache.lucene.search.BooleanQuery;
+
+/**
+ * Builds an empty {@link BooleanQuery} object from a
+ * {@link MatchNoDocsQueryNode} object.
+ */
+public class MatchNoDocsQueryNodeBuilder implements StandardQueryBuilder {
+
+  public MatchNoDocsQueryNodeBuilder() {
+    // empty constructor
+  }
+
+  public BooleanQuery build(QueryNode queryNode) throws QueryNodeException {
+
+    // validates node
+    if (!(queryNode instanceof MatchNoDocsQueryNode)) {
+      throw new QueryNodeException(new MessageImpl(
+          QueryParserMessages.LUCENE_QUERY_CONVERSION_ERROR, queryNode
+              .toQueryString(new EscapeQuerySyntaxImpl()), queryNode.getClass()
+              .getName()));
+    }
+
+    return new BooleanQuery();
+
+  }
+
+}