forked from apache/lucenenet
/
PhraseSlopQueryNode.cs
117 lines (101 loc) · 3.49 KB
/
PhraseSlopQueryNode.cs
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using Lucene.Net.QueryParsers.Flexible.Core.Messages;
using Lucene.Net.QueryParsers.Flexible.Core.Parser;
using Lucene.Net.QueryParsers.Flexible.Messages;
namespace Lucene.Net.QueryParsers.Flexible.Core.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>
/// Query node for <see cref="Search.PhraseQuery"/>'s slop factor.
/// </summary>
public class PhraseSlopQueryNode : QueryNode, IFieldableNode
{
private int value = 0;
/// <summary>
///
/// </summary>
/// <param name="query"></param>
/// <param name="value"></param>
/// <exception cref="QueryNodeError">throw in overridden method to disallow</exception>
public PhraseSlopQueryNode(IQueryNode query, int value)
{
if (query == null)
{
throw new QueryNodeError(new Message(
QueryParserMessages.NODE_ACTION_NOT_SUPPORTED, "query", "null"));
}
this.value = value;
IsLeaf = false;
Allocate();
Add(query);
}
public virtual IQueryNode GetChild()
{
return GetChildren()[0];
}
public virtual int Value
{
get { return this.value; }
}
private string GetValueString()
{
float f = this.value;
if (f == (long)f)
return "" + (long)f;
else
return "" + f;
}
public override string ToString()
{
return "<phraseslop value='" + GetValueString() + "'>" + "\n"
+ GetChild().ToString() + "\n</phraseslop>";
}
public override string ToQueryString(IEscapeQuerySyntax escapeSyntaxParser)
{
if (GetChild() == null)
return "";
return GetChild().ToQueryString(escapeSyntaxParser) + "~"
+ GetValueString();
}
public override IQueryNode CloneTree()
{
PhraseSlopQueryNode clone = (PhraseSlopQueryNode)base.CloneTree();
clone.value = this.value;
return clone;
}
public virtual string Field
{
get
{
IQueryNode child = GetChild();
if (child is IFieldableNode)
{
return ((IFieldableNode)child).Field;
}
return null;
}
set
{
IQueryNode child = GetChild();
if (child is IFieldableNode)
{
((IFieldableNode)child).Field = value;
}
}
}
}
}