/// <summary>
/// Set the target text to be searched. Text iteration will then begin at the
/// start of the text string. This method is useful if you want to reuse an
/// iterator to search within a different body of text.
/// </summary>
///
/// <param name="text">new text iterator to look for match,</param>
/// <exception cref="IllegalArgumentException">thrown when text is null or has 0 length</exception>
/// <seealso cref="M:IBM.ICU.Text.SearchIterator.GetTarget"/>
/// @stable ICU 2.4
public virtual void SetTarget(ICharacterIterator text)
{
if (text == null || text.GetEndIndex() == text.GetIndex())
{
throw new ArgumentException("Illegal null or empty text");
}
targetText = text;
targetText.SetIndex(targetText.GetBeginIndex());
matchLength = 0;
m_reset_ = true;
m_isForwardSearching_ = true;
if (breakIterator != null)
{
breakIterator.SetText(targetText);
}
}
// protected constructor ----------------------------------------------
/// <summary>
/// Protected constructor for use by subclasses. Initializes the iterator
/// with the argument target text for searching and sets the BreakIterator.
/// See class documentation for more details on the use of the target text
/// and BreakIterator.
/// </summary>
///
/// <param name="target">The target text to be searched.</param>
/// <param name="breaker">A <see cref="T:IBM.ICU.Text.BreakIterator"/> that is used to determine theboundaries of a logical match. This argument can be null.</param>
/// <exception cref="IllegalArgumentException">thrown when argument target is null, or of length 0</exception>
/// <seealso cref="T:IBM.ICU.Text.BreakIterator"/>
/// @stable ICU 2.0
protected internal SearchIterator(ICharacterIterator target, BreakIterator breaker)
{
if (target == null ||
(target.GetEndIndex() - target.GetBeginIndex()) == 0)
{
throw new ArgumentException("Illegal argument target. "
+ " Argument can not be null or of length 0");
}
targetText = target;
breakIterator = breaker;
if (breakIterator != null)
{
breakIterator.SetText(target);
}
matchLength = 0;
m_lastMatchStart_ = DONE;
m_isOverlap_ = false;
m_isForwardSearching_ = true;
m_reset_ = true;
m_setOffset_ = DONE;
}
/// <seealso cref="null"/>
public override int GetLength()
{
return(iterator.GetEndIndex() - iterator.GetBeginIndex());
}