content: package com.japisoft.editix.action.search.file;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.regex.Pattern;
  
  import com.japisoft.editix.toolkit.Toolkit;
  
  /**
  This program is available under two licenses : 
  
  1. For non commercial usage : 
  
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  2. For commercial usage :
  
  You need to get a commercial license for source usage at : 
  
  http://www.editix.com/buy.html
  
  Copyright (c) 2018 Alexandre Brillant - JAPISOFT SARL - http://www.japisoft.com
  
  @author Alexandre Brillant - abrillant@japisoft.com
  @author JAPISOFT SARL - http://www.japisoft.com
  
  */
  public class RegexpSearchEngineImpl implements SearchEngine {
  
  	public List search( File f, String item ) {
  		try {
  			BufferedReader br = new BufferedReader( 
  					Toolkit.getReaderForFile( 
  							f ) );
  			try {
  				String l = null;
  				
  				Pattern p = Pattern.compile( item );
  
  				ArrayList res = null;
  				int cpt = 0;
  				while ( ( l = br.readLine() ) != null ) {
  					if ( p.matcher( l ).matches() ) {
  						if ( res == null )
  							res = new ArrayList();
  						res.add( new SearchResultImpl( l, cpt ) );
  					}
  					cpt++;
  				}
  				return res;
  			} finally {
  				br.close();
  			}
  		} catch (Exception e) {
  			return null;
  		}
  	}
  
  	public String toString() {
  		return "Regular expression";
  	}
  
  }
  