/// <summary>
/// Returns a <see cref="Analysis.TokenStream"/> suitable for <paramref name="fieldName"/>, tokenizing
/// the contents of <paramref name="text"/>.
/// <para/>
/// This method uses <see cref="CreateComponents(string, TextReader)"/> to obtain an
/// instance of <see cref="TokenStreamComponents"/>. It returns the sink of the
/// components and stores the components internally. Subsequent calls to this
/// method will reuse the previously stored components after resetting them
/// through <see cref="TokenStreamComponents.SetReader(TextReader)"/>.
/// <para/>
/// <b>NOTE:</b> After calling this method, the consumer must follow the
/// workflow described in <see cref="Analysis.TokenStream"/> to properly consume its contents.
/// See the <see cref="Lucene.Net.Analysis"/> namespace documentation for
/// some examples demonstrating this.
/// </summary>
/// <param name="fieldName">the name of the field the created <see cref="Analysis.TokenStream"/> is used for</param>
/// <param name="text">the <see cref="string"/> the streams source reads from </param>
/// <returns><see cref="Analysis.TokenStream"/> for iterating the analyzed content of <c>reader</c></returns>
/// <exception cref="ObjectDisposedException"> if the Analyzer is disposed. </exception>
/// <exception cref="IOException"> if an i/o error occurs (may rarely happen for strings). </exception>
/// <seealso cref="GetTokenStream(string, TextReader)"/>
public TokenStream GetTokenStream(string fieldName, string text)
{
TokenStreamComponents components = reuseStrategy.GetReusableComponents(this, fieldName);
ReusableStringReader strReader =
(components == null || components.reusableStringReader == null)
? new ReusableStringReader()
: components.reusableStringReader;
strReader.SetValue(text);
var r = InitReader(fieldName, strReader);
if (components == null)
{
components = CreateComponents(fieldName, r);
reuseStrategy.SetReusableComponents(this, fieldName, components);
}
else
{
components.SetReader(r);
}
components.reusableStringReader = strReader;
return(components.TokenStream);
}
public virtual void Test()
{
ReusableStringReader reader = new ReusableStringReader();
Assert.AreEqual(-1, reader.Read());
Assert.AreEqual(-1, reader.Read(new char[1], 0, 1));
Assert.AreEqual(-1, reader.Read(new char[2], 1, 1));
//Assert.AreEqual(-1, reader.Read(CharBuffer.wrap(new char[2])));
reader.Value = "foobar";
char[] buf = new char[4];
Assert.AreEqual(4, reader.Read(buf, 0, 4));
Assert.AreEqual("foob", new string(buf));
Assert.AreEqual(2, reader.Read(buf, 0, 2));
Assert.AreEqual("ar", new string(buf, 0, 2));
Assert.AreEqual(-1, reader.Read(buf, 2, 0));
reader.Close();
reader.Value = "foobar";
Assert.AreEqual(0, reader.Read(buf, 1, 0));
Assert.AreEqual(3, reader.Read(buf, 1, 3));
Assert.AreEqual("foo", new string(buf, 1, 3));
Assert.AreEqual(2, reader.Read(buf, 2, 2));
Assert.AreEqual("ba", new string(buf, 2, 2));
Assert.AreEqual('r', (char)reader.Read());
Assert.AreEqual(-1, reader.Read(buf, 2, 0));
reader.Close();
reader.Value = "foobar";
StringBuilder sb = new StringBuilder();
int ch;
while ((ch = reader.Read()) != -1)
{
sb.Append((char)ch);
}
reader.Close();
Assert.AreEqual("foobar", sb.ToString());
}