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RegexpQueryNode.cs
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RegexpQueryNode.cs
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using Lucene.Net.QueryParsers.Flexible.Core.Nodes;
using Lucene.Net.QueryParsers.Flexible.Core.Parser;
using Lucene.Net.Support;
using Lucene.Net.Util;
using System.Text;
namespace Lucene.Net.QueryParsers.Flexible.Standard.Nodes
{
/*
* 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>
/// A <see cref="RegexpQueryNode"/> represents <see cref="Search.RegexpQuery"/> query Examples: /[a-z]|[0-9]/
/// </summary>
public class RegexpQueryNode : QueryNode, ITextableQueryNode, IFieldableNode
{
private ICharSequence text;
private string field;
/// <summary>
///
/// </summary>
/// <param name="field">field name</param>
/// <param name="text">value that contains a regular expression</param>
/// <param name="begin">position in the query string</param>
/// <param name="end">position in the query string</param>
// LUCENENET specific overload for passing text as string
public RegexpQueryNode(string field, string text, int begin,
int end)
: this(field, text.ToCharSequence(), begin, end)
{
}
/// <summary>
///
/// </summary>
/// <param name="field">field name</param>
/// <param name="text">value that contains a regular expression</param>
/// <param name="begin">position in the query string</param>
/// <param name="end">position in the query string</param>
// LUCENENET specific overload for passing text as StringBuilder
public RegexpQueryNode(string field, StringBuilder text, int begin,
int end)
: this(field, text.ToCharSequence(), begin, end)
{
}
/// <summary>
///
/// </summary>
/// <param name="field">field name</param>
/// <param name="text">value that contains a regular expression</param>
/// <param name="begin">position in the query string</param>
/// <param name="end">position in the query string</param>
public RegexpQueryNode(string field, ICharSequence text, int begin,
int end)
{
this.field = field;
this.text = text.SubSequence(begin, end);
}
public virtual BytesRef TextToBytesRef()
{
return new BytesRef(text.ToString());
}
public override string ToString()
{
return "<regexp field='" + this.field + "' term='" + this.text + "'/>";
}
public override IQueryNode CloneTree()
{
RegexpQueryNode clone = (RegexpQueryNode)base.CloneTree();
clone.field = this.field;
clone.text = this.text;
return clone;
}
public virtual ICharSequence Text
{
get { return text; }
set { this.text = value; }
}
public virtual string Field
{
get { return field; }
set { this.field = value; }
}
public virtual string GetFieldAsString()
{
return field.ToString();
}
public override string ToQueryString(IEscapeQuerySyntax escapeSyntaxParser)
{
return IsDefaultField(field) ? "/" + text + "/" : field + ":/" + text + "/";
}
}
}