import java.io.*;
import java.text.*;
import java.util.*;
/**
 * FileSentenceReader - Uses sound i18n method to parse sentences.
 * Created 12/03, Last mofified 09/07
 * @author: Tony Dahlman
 */
public class FileSentenceReader {
	/** Reads through a text file, parsing it into sentences
	* in sound i18n fashion. Returns an ArrayList of the
	* sentences.  Just open the file and call FileSentenceReader.
	* getAllSentences( filename ).
	*/
	public static ArrayList getAllSentences( File f ) {
		BreakIterator sIter = BreakIterator.getSentenceInstance();
		ArrayList aL = new ArrayList();
		try{
			BufferedReader ins = new BufferedReader( new FileReader( f ) );
			StringBuffer sbuf = new StringBuffer(1025);
			boolean done = false;
			int chCount = 1024;
			char[] text = null;

			while( chCount > -1 && ! done ) {
				text = new char[1024];
				chCount = ins.read( text, 0, 1024 );
				if( chCount < 1024 )
					done = true;		// this is the last pass

				// build a string for the iterator from the stream
				sbuf.setLength(0);
				sbuf.append( text );
				sbuf.append( ' ' );
				String str = sbuf.toString();

				sIter.setText( str );
				int start = sIter.first();
				int end = 0;
				for( end = sIter.next();
					 	end != BreakIterator.DONE;
					 	start = end, end = sIter.next() ) {
					aL.add( str.substring( start, end ) );
				}
			}
			ins.close();	// always close your streams!
			// Eliminate the CR/LF baggage at the end of the text buffer
			String s = (String)aL.remove( aL.size() - 1 );
			s = s.trim();
			aL.add( s );
		} catch( IOException ioe ) {
			ioe.printStackTrace();
		}
		return aL;
	}

	/**
	 * test code
	 */
	public static void main(String[] args) {
		if( args.length != 1 )
			return;

		File f = new File( args[0] );
		if( !f.exists() )
			return;
		if( f.isDirectory() || ! f.canRead() )
			return;

		ArrayList aL = FileSentenceReader.getAllSentences( f );
		System.out.println("Found " + aL.size() 
				+ " sentences in file " + f );
		Iterator i = aL.iterator();
		while( i.hasNext() )
			System.out.println( (String)i.next() );
	}
}