pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.5.0 / lucene / contrib / queryparser / src / java / org / apache / lucene / queryParser / precedence / processors / PrecedenceQueryNodeProcessorPipeline.java

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/precedence/processors/PrecedenceQueryNodeProcessorPipeline.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/precedence/processors/PrecedenceQueryNodeProcessorPipeline.java
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/precedence/processors/PrecedenceQueryNodeProcessorPipeline.java
@@ -0,0 +1,59 @@
+package org.apache.lucene.queryParser.precedence.processors;
+
+/**
+ * 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.config.QueryConfigHandler;
+import org.apache.lucene.queryParser.precedence.PrecedenceQueryParser;
+import org.apache.lucene.queryParser.standard.processors.GroupQueryNodeProcessor;
+import org.apache.lucene.queryParser.standard.processors.StandardQueryNodeProcessorPipeline;
+
+/**
+ * <p>
+ * This processor pipeline extends {@link StandardQueryNodeProcessorPipeline} and enables
+ * boolean precedence on it.
+ * </p>
+ * <p>
+ * EXPERT: the precedence is enabled by removing {@link GroupQueryNodeProcessor} from the
+ * {@link StandardQueryNodeProcessorPipeline} and appending {@link BooleanModifiersQueryNodeProcessor}
+ * to the pipeline.
+ * </p>
+ * 
+ * @see PrecedenceQueryParser
+ *  @see StandardQueryNodeProcessorPipeline
+ */
+public class PrecedenceQueryNodeProcessorPipeline extends StandardQueryNodeProcessorPipeline {
+
+  /**
+   * @see StandardQueryNodeProcessorPipeline#StandardQueryNodeProcessorPipeline(QueryConfigHandler)
+   */
+  public PrecedenceQueryNodeProcessorPipeline(QueryConfigHandler queryConfig) {
+    super(queryConfig);
+    
+    for (int i = 0 ; i < size() ; i++) {
+      
+      if (get(i).getClass().equals(GroupQueryNodeProcessor.class)) {
+        remove(i--);
+      }
+      
+    }
+    
+    add(new BooleanModifiersQueryNodeProcessor());
+    
+  }
+
+}