/*
* 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.
*/
using System;
namespace Lucene.Net.Analysis
{
/// Holds a map of String input to String output, to be used
/// with {@link MappingCharFilter}.
///
public class NormalizeCharMap
{
//Map submap;
internal System.Collections.IDictionary submap;
internal System.String normStr;
internal int diff;
/// Records a replacement to be applied to the inputs
/// stream. Whenever singleMatch
occurs in
/// the input, it will be replaced with
/// replacement
.
///
///
/// input String to be replaced
///
/// output String
///
public virtual void Add(System.String singleMatch, System.String replacement)
{
NormalizeCharMap currMap = this;
for (int i = 0; i < singleMatch.Length; i++)
{
char c = singleMatch[i];
if (currMap.submap == null)
{
currMap.submap = new System.Collections.Hashtable(1);
}
NormalizeCharMap map = (NormalizeCharMap) currMap.submap[CharacterCache.ValueOf(c)];
if (map == null)
{
map = new NormalizeCharMap();
currMap.submap[c] = map;
}
currMap = map;
}
if (currMap.normStr != null)
{
throw new System.SystemException("MappingCharFilter: there is already a mapping for " + singleMatch);
}
currMap.normStr = replacement;
currMap.diff = singleMatch.Length - replacement.Length;
}
}
}