pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / contrib / queryparser / src / java / org / apache / lucene / queryParser / standard / processors / RemoveEmptyNonLeafQueryNodeProcessor.java

diff --git a/lucene-java-3.4.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/processors/RemoveEmptyNonLeafQueryNodeProcessor.java b/lucene-java-3.4.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/processors/RemoveEmptyNonLeafQueryNodeProcessor.java
deleted file mode 100644 (file)
index 0f182a9..0000000
--- a/lucene-java-3.4.0/lucene/contrib/queryparser/src/java/org/apache/lucene/queryParser/standard/processors/RemoveEmptyNonLeafQueryNodeProcessor.java
+++ /dev/null
@@ -1,116 +0,0 @@
-package org.apache.lucene.queryParser.standard.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 java.util.LinkedList;
-import java.util.List;
-
-import org.apache.lucene.queryParser.core.QueryNodeException;
-import org.apache.lucene.queryParser.core.nodes.GroupQueryNode;
-import org.apache.lucene.queryParser.core.nodes.MatchNoDocsQueryNode;
-import org.apache.lucene.queryParser.core.nodes.ModifierQueryNode;
-import org.apache.lucene.queryParser.core.nodes.QueryNode;
-import org.apache.lucene.queryParser.core.processors.QueryNodeProcessorImpl;
-
-/**
- * This processor removes every {@link QueryNode} that is not a leaf and has not
- * children. If after processing the entire tree the root node is not a leaf and
- * has no children, a {@link MatchNoDocsQueryNode} object is returned. <br/>
- * <br/>
- * This processor is used at the end of a pipeline to avoid invalid query node
- * tree structures like a {@link GroupQueryNode} or {@link ModifierQueryNode}
- * with no children. <br/>
- * 
- * @see QueryNode
- * @see MatchNoDocsQueryNode
- */
-public class RemoveEmptyNonLeafQueryNodeProcessor extends
-    QueryNodeProcessorImpl {
-
-  private LinkedList<QueryNode> childrenBuffer = new LinkedList<QueryNode>();
-
-  public RemoveEmptyNonLeafQueryNodeProcessor() {
-    // empty constructor
-  }
-
-  @Override
-  public QueryNode process(QueryNode queryTree) throws QueryNodeException {
-    queryTree = super.process(queryTree);
-
-    if (!queryTree.isLeaf()) {
-
-      List<QueryNode> children = queryTree.getChildren();
-
-      if (children == null || children.size() == 0) {
-        return new MatchNoDocsQueryNode();
-      }
-
-    }
-
-    return queryTree;
-
-  }
-
-  @Override
-  protected QueryNode postProcessNode(QueryNode node) throws QueryNodeException {
-
-    return node;
-
-  }
-
-  @Override
-  protected QueryNode preProcessNode(QueryNode node) throws QueryNodeException {
-
-    return node;
-
-  }
-
-  @Override
-  protected List<QueryNode> setChildrenOrder(List<QueryNode> children)
-      throws QueryNodeException {
-
-    try {
-
-      for (QueryNode child : children) {
-
-        if (!child.isLeaf()) {
-
-          List<QueryNode> grandChildren = child.getChildren();
-
-          if (grandChildren != null && grandChildren.size() > 0) {
-            this.childrenBuffer.add(child);
-          }
-
-        } else {
-          this.childrenBuffer.add(child);
-        }
-
-      }
-
-      children.clear();
-      children.addAll(this.childrenBuffer);
-
-    } finally {
-      this.childrenBuffer.clear();
-    }
-
-    return children;
-
-  }
-
-}