forked from apache/lucenenet
/
JapaneseKatakanaStemFilterFactory.cs
61 lines (57 loc) · 2.61 KB
/
JapaneseKatakanaStemFilterFactory.cs
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using Lucene.Net.Analysis.Util;
using System;
using System.Collections.Generic;
namespace Lucene.Net.Analysis.Ja
{
/*
* 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>
/// Factory for <see cref="JapaneseKatakanaStemFilter"/>.
/// <code>
/// <fieldType name="text_ja" class="solr.TextField">
/// <analyzer>
/// <tokenizer class="solr.JapaneseTokenizerFactory"/>
/// <filter class="solr.JapaneseKatakanaStemFilterFactory"
/// minimumLength="4"/>
/// </analyzer>
/// </fieldType>
/// </code>
/// </summary>
public class JapaneseKatakanaStemFilterFactory : TokenFilterFactory
{
private const string MINIMUM_LENGTH_PARAM = "minimumLength";
private readonly int minimumLength;
/// <summary>Creates a new <see cref="JapaneseKatakanaStemFilterFactory"/></summary>
public JapaneseKatakanaStemFilterFactory(IDictionary<string, string> args)
: base(args)
{
minimumLength = GetInt32(args, MINIMUM_LENGTH_PARAM, JapaneseKatakanaStemFilter.DEFAULT_MINIMUM_LENGTH);
if (minimumLength < 2)
{
throw new ArgumentOutOfRangeException(nameof(minimumLength), "Illegal " + MINIMUM_LENGTH_PARAM + " " + minimumLength + " (must be 2 or greater)"); // LUCENENET specific - changed from IllegalArgumentException to ArgumentOutOfRangeException (.NET convention)
}
if (args.Count > 0)
{
throw new ArgumentException(string.Format(J2N.Text.StringFormatter.CurrentCulture, "Unknown parameters: {0}", args));
}
}
public override TokenStream Create(TokenStream input)
{
return new JapaneseKatakanaStemFilter(input, minimumLength);
}
}
}