trimfilter.java

java编写的OCR软件

package de.spieleck.app.jacson.filter;

import de.spieleck.config.ConfigNode;

import de.spieleck.app.jacson.JacsonException;
import de.spieleck.app.jacson.JacsonConfigException;
import de.spieleck.app.jacson.JacsonRegistry;

/**
 * This filter trims away (Unicode) whitespace leading and trailing the chunk.
 * @author fsn
 */
public class TrimFilter
    extends ConstFilter
{
    public void init(ConfigNode config, JacsonRegistry registry)
        throws JacsonConfigException
    {
    }

    public boolean accept(ConfigNode node)
    {
        return false;
    }

    public void putChunk(String chunk)
        throws JacsonException
    {
        if ( chunk == null )
        {
            drain.putChunk(chunk);
        }
        else 
        {
            int len = chunk.length();
            int l = 0;
            while ( l < len && Character.isWhitespace(chunk.charAt(l)) )
                l++;
            int r = len-1;
            while ( l < r && Character.isWhitespace(chunk.charAt(r)) )
                r--;
            if ( l == 0 && r == len - 1 )
                drain.putChunk(chunk );
            else
                drain.putChunk(chunk.substring(l,r+1) );
        }
    }
}
//
//    Jacson - Text Filtering with Java.
//    Copyright (C) 2002 Frank S. Nestel (nestefan -at- users.sourceforge.net)
//
//    This library is free software; you can redistribute it and/or
//    modify it under the terms of the GNU Lesser General Public
//    License as published by the Free Software Foundation; either
//    version 2.1 of the License, or (at your option) any later version.
//
//    This library 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
//    Lesser General Public License for more details.
//
//    You should have received a copy of the GNU Lesser General Public
//    License along with this library; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//