| using J2N.Text; |
| using Lucene.Net.QueryParsers.Flexible.Core.Nodes; |
| using Lucene.Net.QueryParsers.Flexible.Core.Processors; |
| using Lucene.Net.QueryParsers.Flexible.Core.Util; |
| using Lucene.Net.QueryParsers.Flexible.Standard.Nodes; |
| using System; |
| using System.Collections.Generic; |
| |
| namespace Lucene.Net.QueryParsers.Flexible.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. |
| */ |
| |
| /// <summary> |
| /// Processes <see cref="Search.TermRangeQuery"/>s with open ranges. |
| /// </summary> |
| public class OpenRangeQueryNodeProcessor : QueryNodeProcessor |
| { |
| public readonly static string OPEN_RANGE_TOKEN = "*"; |
| |
| public OpenRangeQueryNodeProcessor() { } |
| |
| protected override IQueryNode PostProcessNode(IQueryNode node) |
| { |
| if (node is TermRangeQueryNode rangeNode) |
| { |
| FieldQueryNode lowerNode = (FieldQueryNode)rangeNode.LowerBound; |
| FieldQueryNode upperNode = (FieldQueryNode)rangeNode.UpperBound; |
| ICharSequence lowerText = lowerNode.Text; |
| ICharSequence upperText = upperNode.Text; |
| |
| if (OPEN_RANGE_TOKEN.Equals(upperNode.GetTextAsString(), StringComparison.Ordinal) |
| && (!(upperText is UnescapedCharSequence unescapedUpperText) || !unescapedUpperText.WasEscaped(0))) |
| { |
| upperText = "".AsCharSequence(); |
| } |
| |
| if (OPEN_RANGE_TOKEN.Equals(lowerNode.GetTextAsString(), StringComparison.Ordinal) |
| && (!(lowerText is UnescapedCharSequence unescapedLowerText) || !unescapedLowerText.WasEscaped(0))) |
| { |
| lowerText = "".AsCharSequence(); |
| } |
| |
| lowerNode.Text = lowerText; |
| upperNode.Text = upperText; |
| } |
| |
| return node; |
| } |
| |
| protected override IQueryNode PreProcessNode(IQueryNode node) |
| { |
| return node; |
| } |
| |
| protected override IList<IQueryNode> SetChildrenOrder(IList<IQueryNode> children) |
| { |
| return children; |
| } |
| } |
| } |