/// <summary>
/// Expert: create a new Analyzer with a custom <see cref="ReuseStrategy"/>.
/// <para/>
/// NOTE: if you just want to reuse on a per-field basis, its easier to
/// use a subclass of <see cref="AnalyzerWrapper"/> such as
/// <c>Lucene.Net.Analysis.Common.Miscellaneous.PerFieldAnalyzerWrapper</c>
/// instead.
/// </summary>
public Analyzer(ReuseStrategy reuseStrategy)
{
this.reuseStrategy = reuseStrategy;
}
public AnonymousAnalyzer(Func <string, TextReader, TokenStreamComponents> createComponents, Func <string, TextReader, TextReader> initReader, ReuseStrategy reuseStrategy)
: base(reuseStrategy)
{
if (createComponents == null)
{
throw new ArgumentNullException("createComponents");
}
this.createComponents = createComponents;
this.initReader = initReader;
}
/// <summary>
/// Creates a new instance with the ability to specify the body of the <see cref="CreateComponents(string, TextReader)"/>
/// method through the <paramref name="createComponents"/> parameter, the body of the <see cref="InitReader(string, TextReader)"/>
/// method through the <paramref name="initReader"/> parameter, and allows the use of a <see cref="ReuseStrategy"/>.
/// Simple example:
/// <code>
/// var analyzer = Analyzer.NewAnonymous(createComponents: (fieldName, reader) =>
/// {
/// Tokenizer source = new FooTokenizer(reader);
/// TokenStream filter = new FooFilter(source);
/// filter = new BarFilter(filter);
/// return new TokenStreamComponents(source, filter);
/// }, initReader: (fieldName, reader) =>
/// {
/// return new HTMLStripCharFilter(reader);
/// }, reuseStrategy);
/// </code>
/// <para/>
/// LUCENENET specific
/// </summary>
/// <param name="createComponents">
/// A delegate method that represents (is called by) the <see cref="CreateComponents(string, TextReader)"/>
/// method. It accepts a <see cref="string"/> fieldName and a <see cref="TextReader"/> reader and
/// returns the <see cref="TokenStreamComponents"/> for this analyzer.
/// </param>
/// <param name="initReader">A delegate method that represents (is called by) the <see cref="InitReader(string, TextReader)"/>
/// method. It accepts a <see cref="string"/> fieldName and a <see cref="TextReader"/> reader and
/// returns the <see cref="TextReader"/> that can be modified or wrapped by the <paramref name="initReader"/> method.</param>
/// <param name="reuseStrategy">A custom <see cref="ReuseStrategy"/> instance.</param>
/// <returns> A new <see cref="AnonymousAnalyzer"/> instance.</returns>
public static Analyzer NewAnonymous(Func <string, TextReader, TokenStreamComponents> createComponents, Func <string, TextReader, TextReader> initReader, ReuseStrategy reuseStrategy)
{
return(new AnonymousAnalyzer(createComponents, initReader, reuseStrategy));
}
/// <summary>
/// Creates a new instance with the ability to specify the body of the <see cref="CreateComponents(string, TextReader)"/>
/// method through the <paramref name="createComponents"/> parameter and allows the use of a <see cref="ReuseStrategy"/>.
/// Simple example:
/// <code>
/// var analyzer = Analyzer.NewAnonymous(createComponents: (fieldName, reader) =>
/// {
/// Tokenizer source = new FooTokenizer(reader);
/// TokenStream filter = new FooFilter(source);
/// filter = new BarFilter(filter);
/// return new TokenStreamComponents(source, filter);
/// }, reuseStrategy);
/// </code>
/// <para/>
/// LUCENENET specific
/// </summary>
/// <param name="createComponents">
/// An delegate method that represents (is called by) the <see cref="CreateComponents(string, TextReader)"/>
/// method. It accepts a <see cref="string"/> fieldName and a <see cref="TextReader"/> reader and
/// returns the <see cref="TokenStreamComponents"/> for this analyzer.
/// </param>
/// <param name="reuseStrategy">A custom <see cref="ReuseStrategy"/> instance.</param>
/// <returns> A new <see cref="AnonymousAnalyzer"/> instance.</returns>
public static Analyzer NewAnonymous(Func <string, TextReader, TokenStreamComponents> createComponents, ReuseStrategy reuseStrategy)
{
return(NewAnonymous(createComponents, null, reuseStrategy));
}
/// <summary>
/// Expert: create a new Analyzer with a custom <see cref="ReuseStrategy"/>.
/// <para/>
/// NOTE: if you just want to reuse on a per-field basis, its easier to
/// use a subclass of <see cref="AnalyzerWrapper"/> such as
/// <c>Lucene.Net.Analysis.Common.Miscellaneous.PerFieldAnalyzerWrapper</c>
/// instead.
/// </summary>
protected Analyzer(ReuseStrategy reuseStrategy) // LUCENENET: CA1012: Abstract types should not have constructors (marked protected)
{
this.reuseStrategy = reuseStrategy;
}
/// <summary>
/// Creates a new <see cref="AnalyzerWrapper"/> with the given reuse strategy.
/// <para/>If you want to wrap a single delegate <see cref="Analyzer"/> you can probably
/// reuse its strategy when instantiating this subclass:
/// <c>base(innerAnalyzer.Strategy)</c>.
/// <para/>If you choose different analyzers per field, use
/// <see cref="Analyzer.PER_FIELD_REUSE_STRATEGY"/>.
/// </summary>
/// <seealso cref="Analyzer.Strategy"/>
protected internal AnalyzerWrapper(ReuseStrategy reuseStrategy)
: base(reuseStrategy)
{
}
