pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/SlopQueryNodeBuilder.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/SlopQueryNodeBuilder.java
new file mode 100644 (file)
index 0000000..07ed876
--- /dev/null
+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/builders/SlopQueryNodeBuilder.java
@@ -0,0 +1,57 @@
+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.queryParser.core.QueryNodeException;
+import org.apache.lucene.queryParser.core.builders.QueryTreeBuilder;
+import org.apache.lucene.queryParser.core.nodes.QueryNode;
+import org.apache.lucene.queryParser.core.nodes.SlopQueryNode;
+import org.apache.lucene.search.MultiPhraseQuery;
+import org.apache.lucene.search.PhraseQuery;
+import org.apache.lucene.search.Query;
+
+/**
+ * This builder basically reads the {@link Query} object set on the
+ * {@link SlopQueryNode} child using
+ * {@link QueryTreeBuilder#QUERY_TREE_BUILDER_TAGID} and applies the slop value
+ * defined in the {@link SlopQueryNode}.
+ */
+public class SlopQueryNodeBuilder implements StandardQueryBuilder {
+
+  public SlopQueryNodeBuilder() {
+    // empty constructor
+  }
+
+  public Query build(QueryNode queryNode) throws QueryNodeException {
+    SlopQueryNode phraseSlopNode = (SlopQueryNode) queryNode;
+
+    Query query = (Query) phraseSlopNode.getChild().getTag(
+        QueryTreeBuilder.QUERY_TREE_BUILDER_TAGID);
+
+    if (query instanceof PhraseQuery) {
+      ((PhraseQuery) query).setSlop(phraseSlopNode.getValue());
+
+    } else {
+      ((MultiPhraseQuery) query).setSlop(phraseSlopNode.getValue());
+    }
+
+    return query;
+
+  }
+
+}