pylucene 3.5.0-3

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

diff --git a/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/precedence/PrecedenceQueryParser.java b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/precedence/PrecedenceQueryParser.java
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+++ b/lucene-java-3.5.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/precedence/PrecedenceQueryParser.java
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+package org.apache.lucene.queryParser.precedence;
+
+/**
+ * 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.analysis.Analyzer;
+import org.apache.lucene.queryParser.precedence.processors.PrecedenceQueryNodeProcessorPipeline;
+import org.apache.lucene.queryParser.standard.StandardQueryParser;
+import org.apache.lucene.queryParser.standard.processors.StandardQueryNodeProcessorPipeline;
+
+/**
+ * <p>
+ * This query parser works exactly as the standard query parser ( {@link StandardQueryParser} ), 
+ * except that it respect the boolean precedence, so &lt;a AND b OR c AND d&gt; is parsed to &lt;(+a +b) (+c +d)&gt;
+ * instead of &lt;+a +b +c +d&gt;.
+ * </p>
+ * <p>
+ * EXPERT: This class extends {@link StandardQueryParser}, but uses {@link PrecedenceQueryNodeProcessorPipeline}
+ * instead of {@link StandardQueryNodeProcessorPipeline} to process the query tree.
+ * </p>
+ * 
+ * @see StandardQueryParser
+ */
+public class PrecedenceQueryParser extends StandardQueryParser {
+  
+  /**
+   * @see StandardQueryParser#StandardQueryParser()
+   */
+  public PrecedenceQueryParser() {
+    setQueryNodeProcessor(new PrecedenceQueryNodeProcessorPipeline(getQueryConfigHandler()));
+  }
+  
+  /**
+   * @see StandardQueryParser#StandardQueryParser(Analyzer)
+   */
+  public PrecedenceQueryParser(Analyzer analyer) {
+    super(analyer);
+    
+    setQueryNodeProcessor(new PrecedenceQueryNodeProcessorPipeline(getQueryConfigHandler()));
+    
+  }
+
+}