public override bool Equals(object other)
{
if (other == this)
{
return(true);
}
if (other is PositionLengthAttribute)
{
PositionLengthAttribute _other = (PositionLengthAttribute)other;
return(positionLength == _other.positionLength);
}
return(false);
}
public override void CopyTo(Attribute target)
{
PositionLengthAttribute t = (PositionLengthAttribute)target;
t.PositionLength = positionLength;
}
/// <summary>
/// Creates NGramTokenFilter with given min and max n-grams. </summary>
/// <param name="version"> Lucene version to enable correct position increments.
/// See <a href="#version">above</a> for details. </param>
/// <param name="input"> <seealso cref="TokenStream"/> holding the input to be tokenized </param>
/// <param name="minGram"> the smallest n-gram to generate </param>
/// <param name="maxGram"> the largest n-gram to generate </param>
public NGramTokenFilter(Version version, TokenStream input, int minGram, int maxGram)
: base(new CodepointCountFilter(version, input, minGram, int.MaxValue))
{
this.version = version;
this.charUtils = version.OnOrAfter(Version.LUCENE_44) ? CharacterUtils.GetInstance(version) : CharacterUtils.Java4Instance;
if (minGram < 1)
{
throw new System.ArgumentException("minGram must be greater than zero");
}
if (minGram > maxGram)
{
throw new System.ArgumentException("minGram must not be greater than maxGram");
}
this.minGram = minGram;
this.maxGram = maxGram;
if (version.OnOrAfter(Version.LUCENE_44))
{
posIncAtt = AddAttribute(typeof(PositionIncrementAttribute));
posLenAtt = AddAttribute(typeof(PositionLengthAttribute));
}
else
{
posIncAtt = new PositionIncrementAttributeAnonymousInnerClassHelper(this);
posLenAtt = new PositionLengthAttributeAnonymousInnerClassHelper(this);
}
}
