/*
* 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;
using Token = Lucene.Net.Analysis.Token;
namespace Lucene.Net.Highlight
{
/// {@link Fragmenter} implementation which breaks text up into same-size
/// fragments with no concerns over spotting sentence boundaries.
///
/// mark@searcharea.co.uk
///
public class SimpleFragmenter : Fragmenter
{
private const int DEFAULT_FRAGMENT_SIZE = 100;
private int currentNumFrags;
private int fragmentSize;
public SimpleFragmenter():this(DEFAULT_FRAGMENT_SIZE)
{
}
///
/// size in bytes of each fragment
///
public SimpleFragmenter(int fragmentSize)
{
this.fragmentSize = fragmentSize;
}
/* (non-Javadoc)
* @see Lucene.Net.Highlight.TextFragmenter#start(java.lang.String)
*/
public virtual void Start(System.String originalText)
{
currentNumFrags = 1;
}
/* (non-Javadoc)
* @see Lucene.Net.Highlight.TextFragmenter#isNewFragment(org.apache.lucene.analysis.Token)
*/
public virtual bool IsNewFragment(Token token)
{
bool isNewFrag = token.EndOffset() >= (fragmentSize * currentNumFrags);
if (isNewFrag)
{
currentNumFrags++;
}
return isNewFrag;
}
/// size in bytes of each fragment
///
public virtual int GetFragmentSize()
{
return fragmentSize;
}
/// size in bytes of each fragment
///
public virtual void SetFragmentSize(int size)
{
fragmentSize = size;
}
}
}